Category: 2510-01-2

On February 16, 1960, Dormael, Andre van; Nys, Jean; Depoorter, Henri published a patent.Synthetic Route of 2510-01-2 The title of the patent was Polymethine dyes containing phosphorus. And the patent contained the following:

Polymethine dyes containing the system: P: C(C: C)nC: are obtained from tri(alkyl or aryl), phosphonium cyclopentadienylides or from the corresponding bisphosphonium compounds by usual polymethine dye reactions. Thus, 2-(β-phenyleniminoethylidene)-3-ethylbenzoselenazoline and triphenylphosphonium cyclopentadienylide (I) give 2-[2-(5-triphenylphosphoranylidene-1-cyclopentadienyl)vinyl]-3-ethylbenzoselenazolium perchlorate, m. 150-51° (EtOH), absorption maximum 522 mμ, and sensitizing an Ag (Cl,Br) emulsion (30 mg. being added per kg. emulsion) to 600 mμ with a maximum at 565 mμ. Similarly, [m.p. (EtOH), absorption maximum (mμ), emulsion, mg. sensitizer, sensitization limit, and maximum (mμ) given]: 2-(β-phenyliminoethylidene)-3-ethyl-5,6-dimethylbenzoxazoline (II) and I give 2-[2-(5-triphenylphosphoranylidene-1-cyclopentadienyl)vinyl]-3-ethyl-5,6-dimethylbenzoxazolinium perchlorate, 284°, 480, AgBr, 30, 565, 520; 2-[β-[N-(p-toluenesulfonyl)anilino]vinyl]-3-ethylbenzothiazolium iodide (III) and I give 2-[2-(5-triphenylphosphoranylidene-1-cyclopentadienyl)vinyl]-3-ethylbenzothiazolium perchlorate, 150° 515, Ag(Cl,Br), 50, 606, 560; 1-methyl-2-methylthioquinolinium methosulfate and I give 1-methyl-2-(5-triphenylphosphoranylidene-1- cyclopentadienyl)quinolinium perchlorate, 192° 445, AgCl, 100, 510, 480; 3-ethyl-5(acetylanilinomethylidene)rhodanine and I give 2-thio-3ethyl-5-(5-triphenylphosphoranylidene-l-cyclopentadienylmethylidene)-2,4-thiazolidinedione, 240° (PrOH), 487, Ag(Cl,Br), 20, 600, 550; I and CH(OEt)3 give 1-triphenylphosphonio-5-(5-triphenylphosphoranylidene-l-cyclopentadienylmethylidene)cyclopentadiene iodide, 249-50o 487, AgBr, 30, 510, -; I and 2-(β-acetylanilinovinyl)-3-ethylthiazolinium bromide give 2-[2-(5-triphenylphosphoranylidene- 1-cyclopentadienyl )vinyl] -3-ethyl-2-thiazolinium perchlorate, 218deg;, 460, AgCl, 30, 520,490; I and 2-thio-3-ethyl5-[2-( 3-ethyl-2-benzothiazolinylidene )-1-benzylethylidene]2,4-thiazolidinedione give 2-(5-triphenylphosphoranylidene1-cyclopentadienyl )-3-ethyl-4-oxo – 5- [2 – (3-ethyl-2-benzothiazolinylidene)-1-benzylethylidene] thiazolinium iodide, 282-3°, 606, Ag(Br,I), 20, 670, 640; I and 4-Me2NC6H4CHO give 1-triphenylphosphonio-5-(p-dimethylaminophenylmethylidene)cyclopentadiene perchlorate, 250°, 495, -, -, -, -; I and 2-methylthio-3-methylbenzothiazolium methosulfate give 2- (5- triphenylphosphoranylidene- 1-cyclopentadienyl)- 3 – methylbenzothiazolium perchlorate, 242°, 398, AgCl, 100, 445, 425; I and 2-methylthio-3-methylthiazolinium iodide give 2-(5-triphenylphosphoranylidene1-cyclopentadienyl)-3-methyl-2-thiazolinium iodide, 210°, 346, -, -, -, -; I and 2-(β-phenyliminoethylidene)-3ethylbenzoxazoline (IV) give 2-[2-(5-triphenylphosphoranylidene-l-cyclopentadienyl)vinyl] – 3 – ethylbenzoxazolium perchlorate, <250°, 480, Ag(Cl,Br), 30, 540, 515; I and 2- (β- methylthio - β - ethylvinyl) - 3 - ethylnaphtho [ 1,2-d] thiazolinium methosulfate give 1-ethyl-2-[2-(5-triphenylphosphoranylidene- 1 -cyclopentadienyl)- 2 - ethylvinyl] naphtho[1,2-d]thiazolium perchlorate, 160°, 542, Ag(Br,I), 30, 625, 580; I and 1-ethyl-2-(β-phenyliminoethylidene)-6methoxy-1,2-dihydroquinoline give 1-ethyl-2-[2-(5-triphenylphosphoranylidene- 1 -cyclopentadienyl)vinyl] -6-methoxyqulnolinium perchlorate, 210°, 550, Ag(Cl,Br), 30, 625, 570; I and -anilinoacrolein anil hydrochloride give 1-triphenylphosphonio-5-[3-(5- triphenylphosphoranylidene-1 cyclopentadienyl)allylidene] cyclopentadiene perchlorate, 244° 597, -, -, -, -; I and glutaconaldehyde dianil hydrochloride give 1-triphenylphosphonio-5-[5-(5-triphenylphosphoranylidene-1-cyclopentadienyl) - 2,4-pentadienylidene] cyclopentadiene perchlorate, <250°, 695, -, -, -, -; I and 1,3-diethyl-2-[β-[N-(p-toluenesulfonyl)anilino]vinyl]5,6-dichlorobenzimidazolium chloride give 1-ethyl-2-[2(5 - triphenylphosphoranylidene-1-cyclopentadienyl)vinyl] 3-ethyl-5,6-dichlorobenzimidazolium iodide, <260°, 482, Ag(Cl,Br), 20, 550, 520; I and anilinomethylidenemalonitrile give 3-(5-triphenylphosphoranylidene-1-cyclopentadienyl)-2-cyano-2-acrylonitrile, 199° (PrOH), 402 -, -, -, -; I, Ac2O, and MeC(OEt)3 give 1-triphenylphosphonio 5-[α-(5-triphenylphosphoranylidene-1-cyclopentadienyl)ethylidene]cyclopentadiene perchlorate, 160°, 488, -, -; II and p-bromophenyldiphenylphosphonium cyclopentadienylide (V) (m. 215°) give 2-[2-[5-(p-bromophenyldiphenylphosphoranylidene)-1-cyclopentadienyl]vinyl]3-ethyl-5,6-dimethylbenzoxazolium perchlorate, 220°, 485, AgBr, 30, 570, 525; III and V give 2-[2-[5-(p-bromophenyldiphenylphosphoranylidene)-1-cyclopentadienyl] vinyl]-3ethylbenzothiazolium perchlorate, -, 519, AgBr, 30, 610, 565; IV and V give 2-[2-[5-(p-bromophenyldiphenylphosphoranylidene)-1-cyclopentadienyl] vinyl]-3-ethylbenzoxazolium perchlorate, -, 478, Ag(Cl,Br), 30, 540, 515; tripropylphosphonium cyclopentadienylide (VI) and II give 2-[2- [ 5-(tripropylphosphoranylidene)-1-cyclopentadienyl] vinyl]-3-ethyl-5,6-dimethylbenzoxazolium perchlorate, -, 487, -, -, -, -; VI and III give 2-[2-[5-(tripropylphosphoranylidene)-1-cyclopentadienyl] vinyl]-3-ethylbenzothiazolium perchlorate. -, 519, -, -, -, -. The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).Synthetic Route of 2510-01-2

2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas:2510-01-2) belongs to nitriles. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.Synthetic Route of 2510-01-2

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Anderson, D. M. W.; Bell, F.; Duncan, J. L. published an article in 1961, the title of the article was Some condensation products of malononitrile.Reference of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile And the article contains the following content:

Malononitrile (I) was condensed with a variety of carbonyl compounds, and the infrared spectra of the products recorded. I and Me2CO gave isopropylidenemalononitrile (II), b10 98°. The residue from the distillation formed a yellow powder, decomposed at 300°. Interaction of Me2CO with I gave a yellow K salt, and decomposition with AcOH gave plates, decomposed at 170° with evolution of isobutcne. This yielded a yellow powder as above. II was soluble in aqueous NH4OH. NHEt2 (0.2 cc.) in 2 cc. Me2CO added to 25 cc. Me2CO and 5 g. I, left overnight, and the product crystallized gave 2.4 g. of the isopropylidenemalonouitrile dimer (III), prisms, m. 171-4°. The solution contained Me2CO, identified as the 2,4-dinitrophenylhydrazone. If in this reaction the concentration of I was raised, the principal product was no longer III but the compound which decomposed at 170°. NHEt2 (0.2 cc.) in 2 cc. alc. kept 2 hrs. at 70° with 3 cc. mesityl oxide and 1.7 g. I in 5 cc. alc. gave 1.1 g. of the product, m. 170° (decomposition). II was treated with piperidine or in C6H6 solution of piperidine or in Me2CO solution with NHEt2; in each case the product disintegrated at 170°. Mesityl oxide did not react with I under the conditions used to prepare II. No condensation product was isolated from a mixture of phorone and I containing NHEt2. No reaction occurred between III and Me2CO with NHEt2. Condensation in alc. by KOEt also failed. When NH4OH was added to a solution of 3 g. I in 5 cc. Me2CO the mixture became hot and set to a yellow crystalline mass. acidification and isolation gave malononitrile trimer. Schenck’s I trimer, prepared by the action of dry NH3 on C6H6 suspension of I, crystallized to give a product, m. 220-4°. When I trimer was heated to 230° violent change occurred; the residual mass was extracted with refluxing C5H5N and diluted with alc.; and the product, unmelted at 360° was obtained as yellow crystals from refluxing HCO2H. I (1 g.) added to 1 cc. NHEt2 became very hot and treatment with dilute HCl gave a dimer, m. 168-70°. Submission of I to Schenck’s method for a trimer gave only a dimer, m. 170°. This dimer heated to 200° underwent complex decomposition Acetophenone (4 cc.) and 2 g. I containing a few drops NHEt2 kept warm a few hrs., cooled, and the product crystallized gave 1,1-dicyano-2-methyl2-phenylethylene (IV), m. 94°, and canary yellow needles of an isomer (V), m. 205-7°. IV could be partially converted into V by heating 3 hrs. at 70° in the presence of some NHEt2. The spectrum of V did not agree with the expected 4-amino-1,1,5-tricyano-2,6-diphenylhepta-1,3,5triene. Et α-cyano-1-indanylideneacetate formed needles, m. 100-2°; Me ester m. 142-4°. Refluxing I and indanone in C5H5N or alc. containing a drop piperidine gave 1-dicyanomethyleneindan (VI), m. 152°. 2-(1′-Indanylidene)indan1-one was unchanged after reflexing with I, I dimer, or Et cyanoaeetate in alc. K2CO3 (3 g.) added to 2 g. 1-indanone and 1.5 g. I in alc. and warmed 10 min. gave a compound as yellow prisms, m. about 250°. K2CO3 (2.5 g.) refluxed 0.5 hr. with 1.3 g. indanone and 1.8 g. IV in 40 cc. alc., a small amount VI filtered off, and the filtrate acidified and recrystallized gave a compound, m. 250-5°. Fluorenylidenemakmo nitrile from AcOH formed red needles, m. 234-5°. Benzophenone and I gave 1,1-dicyano-2,2-diphenylethylene, m. 138°. NHEt2 added to a mixture of 2.1 g. benzoin and 1.4 g. I in 20 cc. alc., left 2 hrs. and cooled gave 0.7 g. benzil and the filtrate afforded needles, m. 204-6°. NHEt2 (0.2 g.) added to 2.1 g. benzil and 1.4 g. I in 25 cc. alc. and kept 2 hrs. at 70° gave 2-amino-4-benznyl-1,1,3-tricyano-4phenylbutadiene, m. 195° (decomposition). Condensation of benzil and Et cyanoaectate gave Et α-cyano-β-benzoyl-Cinnamate, prisms, m. 139-41°, and a compound suspected of being Et α,γ-dicyano-β-phenylbenzoylglutarate, prisms, m. 169-71°. NHEt2, 2.1 g. benzil, and 1.7 g. cyanoacetamide kept in alc. overnight gave a product, prismatic needles, m. 167-70°. 3-Dicyanomethyleneoxindole when refluxed 1 hr. with Ac2O gave the N-acetyl derivative, m. 170°. Addition of anhydrous K2CO3 to a refluxing suspension of 1 g. isatin in 10 cc. MeOH containing 1 cc. Me cyanoacetate gave Me α-cyano3-oxindolylideneacetate, m. 240-2° (decomposition); N-acetyl derivative, yellow crystals, m. 147-9°. Addition of I to a refluxing alc. solution of 5-methylisatin gave 5-methyl-3-dicyanomethyleneoxindole, m. 260°; N-acetyl derivative m. 198-200°. Treating 1 g. 5-methylisatin and 1 g. I dimer in 20 cc. alc. gave red crystals of 3-(2-amino-1,3,3-tricyanoallylidene)-5methyloxindole, m. 333° (decomposition). Anhydrous K2CO3 (3 g.) added to a refluxing mixture of 2 g. acenaphthenequinone (2 g.) and 2 g. I in 100 cc. alc., left 0.5 hr., and diluted with 100 cc. hot H2O, followed by extraction by Soxhlet gave a blueblack product, decomposed above 300°. NHEt2 added to 1 g. phenanthraquinone and 1 g. I in 200 cc. alc. gave a black product, decomposed at 300°. N-(α-Cyanobenzylidene)-phydroxyaniline was prepared Too long contact with alc.NaOH gave conversion into p-hydroxybenzanilide, m. 214°. By the same method 3-methyl-4-nitrosophenol gave N-(α-cyanobenzylidene)-4-hydroxy-2-methylaniline, yellow needles, m. 198-200°, and 2-methyl-4-nitrosophenol gave N-(α-cyanobenzylidene)-4-hydroxy-3-methylaniline, m. 142-4° (alc.) The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).Reference of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile

2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas:2510-01-2) belongs to nitriles. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.Reference of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

On October 31, 1957, there was a patent about photographic paper, photography.Name: 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile The title of the patent was Photographic emulsions. And the patent contained the following:

The emulsion consists of a mixture of nontanned gelatin, a Ag halide, a tanning or nontanning developer, and a stabilizer. The latter is chosen from 5,5-dimethyl-1,3-cyclohexanedione (I), oxalyl dihydrazone of cyclohexanone (II), 4-cyano-5-phenyl-1,3-cyclohexanedione (III), 5-phenyl-1,3-cyclohexanedione (IV), dicyanomethylenecyclohexane, 1-dicyanomethylene-1,2,3,4-tetrahydronaphthalene, 2-methyl-1-phenyl-4,6-(1H,5H)-pyrimidinedione, dicyanomethyleneindan, (1-cyano-1-ethoxycarbonylmethylene)cyclopentane, cyclohexanone oxime, 2,4-pentanedione dioxime, and 2,5-hexanedione dioxime. I, II, III, and IV also prevent tanning during aging. For example, a contrasting AgCl emulsion (1 mole AgCl in 340 g. gelatin) was melted at 40°; 200 g. aqueous 15% saponin solution and 5 g. dimedon in 50 cc. MeOH were added. A solution of 45 g. 4-phenylpyrocatechol and 19.3 g. 4-methoxy-naphthol in 129 g. tritolyl phosphate at 80° was poured in a stirred solution containing 64.3 g. gelatin, 64 g. aqueous 8% saponin solution and 579 cc. H2O at 50°. The dispersion thus obtained was added to the previous emulsion. The mixture was coated on 46 sq. m. nontanned gelatinized paper. The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).Name: 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile

2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas:2510-01-2) belongs to nitriles. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.Name: 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Fox, Kenneth; Turner, J. E. published an article in 1966, the title of the article was W.K.B. treatment of bound states in an electric-dipole potential.Safety of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile And the article contains the following content:

The W.K.B. (Wentzel-Kramers-Brillouin) method is applied to the problem of bound states of an electron in the field of a finite dipole. A necessary condition for binding is derived which suggests that bound states may exist only if the dipole moment is larger than a certain min. value. The number of bound states given by the W.K.B. method is comparable to the exact number for the 1- and 3-dimensional sq.-well potentials. The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).Safety of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile

2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas:2510-01-2) belongs to nitriles. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.Safety of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

On September 2, 1960, there was a patent about color photography.Quality Control of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile The title of the patent was Cyanines for color photography. And the patent contained the following:

1-Dicyanomethyleneindan (I), m. 147-8o (MeOH), was prepared in 65% yield as grayish white crystals by refluxing 39.6 g. 1-indanone, 19.8 g. malononitrile, 2.5 g. NH4OAc, 4 cc. AcOH, 40 cc. CHCl3, and simultaneous distillation of 5.4 cc. H2O. 2-Dicyanomethyl- eneindan, m. 190-3, was prepared in 73% yield (brownish), 1-dicyanomethylene-1,2,3,4-tetrahydronaphthalene (colorless), m. 107-8 (EtOH), in 48% yield from 1-tetralone, and 2-dicyanomethylene-1,2,3,4-tetrahydronaphthalene (colorless), m. 102-3 (MeOH), in 22% yield. 1,3-Diethyl-5-(2indanylidene)barbituric acid (colorless), m. 165-7 (EtOH) was prepared in 47% yield by refluxing for 2 h. 19 g. 2-indanone, 26.5 g. 1,3-diethylbarbituric acid, and 2.5 cc. piperidine in 100 cc. EtOH. 1-Dicyanomethylene-2-(3methyl-2-benzothiazolinylidene)indan (orange), m. 245-6 (decomposition) (pyridine/MeOH), was prepared in 35% yield by refluxing for 15 min. 5.4 g. I, 7.4 g. 3-methyl-2-methylthiobenzothiazolium p-toluenesulfonate, 6.06 g. Et3N, 50 cc. EtOH; it sensitized Ag(Br,I) emulsions to 565 mμ, maximum 545 mμ. Similarly were obtained (m.p., % yield, limit and absorption maximum in mμ given): 1-dicyanomethylene-2-(3-ethyl2-benzothiazolinylideneethylidene)indan (green needles), 259-60 (decomposition), -, 680, 660; 1-dicyanomethylene-2[(3 – Et – 2- benzothiazolinylidene) – 2- butenylidene]indan (dark green), 240-1 (decomposition), 36, -, -; 1-dicyanomethylene- 2- (3- methyl-2- benzoxazolinylidene)indan (brownish red ), 230-1 ( decomposition ), -, 510, 490; 1-dicyanomethylene2- ( 1 – methylnaphtho [ 1,2] thiazolin-2- ylidene)indan (red), 265-7 (decomposition), 55, 575, 550; 1-dicyanomethylene-2-(1ethyl-2(1H)-quinolylidene)indan, 227-8 (decomposition), 19, -,-; 1-dicyanomethylene-2-[(1-ethylnaphtho[1,2]thiazolin-2-ylidene)isopropylidene]indan (dark), 191-3 (decomposition), 1, -, -; 2-dicyanomethylene-1-[(3-ethyl-2benzothiazolinylidene)ethylidene]indan (II) (green), 246-50 (decomposition), 21, -, -; 2-dicyanomethylene-1-[(3ethyl-2-benzothiazolinylidene)-2-butenylidene]indan (dark green), 228-30, 22, -, -; 2-dicyanomethylene-1-[(3ethyl-2-benzoxazolinylidene)ethylidene]indan (green), 2145 (decomposition), 28, -, -; 2-dicyanomethylene-1,3-bis(3methyl-2-benzothiazolinylidene )indan (dark needles), <310, 32, 610, 565; 2-dicyanomethylene-1,3-bis[(3-ethyl2-benzothiazollnylidene)ethylidene]indan (dark green), 2889, 33, 780, 690; 2-dicyanomethylene-1,3-bis[(3-ethyl-2benzothiazolinylidene)-2-butenylidene]indan (dark), 2378 (decomposition), 13, 690, 630; 2-dicyanomethylene-1-[(3ethyl-2-benzothiazolinylidene )-2- butenylidene] - 3- [( 3- ethy-2-benzothiazolinylidene)ethylidene]indan (black), 244-5 (decomposition), 35, 840, 810; 2-dicyanomethylene-1-[(3-ethyl2-benzothiazolinylidene)ethylidene]-3- [(3-ethyl-2-benzoxazolinylidene)ethylidene]indan (gray), 255-6° (decomposition), 45,730,685; 1,3-diethyl-5-[1-(3-methyl-2-benzothiazolinylidene)indan-2-ylidene] barbituric acid (brownish red), 272-3 (decomposition) (pyridine), 12, -, -; 1,3-diethyl-5-[1,3-bis(3-methyl- 2- benzothiazolinylidene)indan-2-ylidene] barbituric acid (red), <310, 28, -, -; 1,3-diethyl-5-[1,3-bis(3ethyl - 2 - benzothiazolinylideneethylidene)indan - 2 - ylidene] barbituric acid (green), <310, 61, 770, 750; corresponding benzoxazolinylidene derivative (green), 280-1 (decomposition), 41, 720, 680; 1,3-diethyl-5-[1,3-bis(methylnaphtho [ 1,2] thiazolin-2-ylidene )indan-2-ylidene] barbituric acid (dark), 242-3, 62, 620, 590; 1,3-diethyl-5-[1-(3-ethyl-2benzothiazolinylidene)-2-butadienylidene] -3-(3-methyl-2- benzothiazolinylidene )indan-2-ylidene] barbituric acid (green), 285-43 (decomposition), 27, 810, 730; 1,3-diethyl-5-[1- (3 - methyl- 2- benzothiazolinylidene)- 3- ( 1 -methylnaphtho- [1,2]thiazolinylidene)indan-2-ylidene]barbituric acid (red), 231-2 (decomposition), 54, 575, 555; 1-dicyanomethylene- 1,2,3,4- tetrahydro- 2- (3-methyl- 2- benzothiazolinylidene)- naphthalene (red), 232-3 (decomposition), 76, 555, -; 1-di- cyanomethylene- 1,2,3,4- tetrahydro-2- (1-methylnaphtho- [1,2]thiazolin-2-ylidene)naphthalene (brownish red), 289- 90 (decomposition), 80, 580, 555; 1-dicyanomethylene-2-(1- ethyl-2(1H)-quinolylidene)- 1,2,3,4-tetrahydronaphthalene (red), 285-6 (decomposition), 33, -, -; 1-dicyanomethylene- 2-[(3-ethyl-2-benzoxazolinylidene)ethylidene]- 1,2,3,4-tetra- hydronaphthalene (green needles), 213-14 (decomposition), 19, 690, 600; and 1-dicyanomethylene-1,2,3,4-tetrahydro-2-[(3-methyl-2-benzothiazolinylidene)ethylidene] naphthalene (green needles), 231-2 ( decomposition ), 5, 690, 580. The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).Quality Control of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile

2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas:2510-01-2) belongs to nitriles. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.Quality Control of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

On April 7, 1965, Brooker, Leslie G. S.; Webster, Frank G. published a patent.SDS of cas: 2510-01-2 The title of the patent was Holopolar cyanine dyes. And the patent contained the following:

Merocyaninelike dyes of structure I and holopolar cyanine dyes (CA 55, 6220b) of structure of II are described. The dyes are useful photog. sensitizers. A mixture of 19.8 g. 2-indanone, 11 g. CH2(CN)2, 2.5 g. NH4OAc, 4 mL. HOAc, and 100 mL. CHCl3 was refluxed 30 min., evaporated to dryness, and the residue washed with H2O and MeOH to give 73% 2-(dicyanomethylene)indan (III), m. 190-3°. Similarly prepared were (compound, m.p., and % yield given): 1-(dicyanomethylene)indan, 147-8°, 65; 1,3diethyl-5-(2-indanylidene)barbituric acid, 165-7°, 47; 1-(dicyanomethylene)-1,2,3,4-tetrahydronaphthalene, 107-8°, 48; 2-(dicyanomethylene)-1,2,3,4-tetrahydronaphthalene, 102-3°, 22; 4-(2-indanylidene)-3-phenylisoxazolin-5-one, 144-5°, 17; 4-(2-indanylidene)-1-phenyl-5-pyrazolone, 273-4°, 71; 3-ethyl-5-(1-indanylidene)rhodanine, 164-6°, 22. A mixture of III 5.4, 2-(acetanilidovinyl)-3-ethylbenzothiazolium iodide (IV) 13.5, Et3N 3.3 g., and 50 mL. EtOH was refluxed 15 min. and cooled. The precipitate was extracted with hot MeOH and recrystallized from pyridine-MeOH to give 21% I [X = S, Y = C(CN)2, R = Et, R’ = H, n = 0, m = p = 1] (V),m. 246-50° (decomposition). A mixture of V 1.98, IV 2.25, Et3N 0.6 g., and 15 mL. pyridine was refluxed 10 min. and cooled. The precipitate was extracted with two 350-mL. portions of hot pyridine to give 33% II [X = Z = S, Y = C(CN)2, R = R’ = Et, p = q = 1], m. 288-9°, sensitivity maximum 690 mμ, sensitivity limit 780 mμ. Similarly prepared I and II are tabulated. Formula,X,Y,Z,R,R1,Ar,Ar1,n,m,p,q,%yield,m.p.(decomposition),sensitivity maximum(mμ),sensitivity limit(mμ);I,S,C(CN)2, ,Me, , , ,1,0,0, ,35,245-6°,545,565;I,S,C(CN)2, ,Et,H, , ,1,0,1, , ,259-60°,660,680;I,S,C(CN)2, ,Et,H, , ,1,0,2, ,36,240-1°, , ;I,O,C(CN)2, ,Me, , , ,1,0,0, ,28,230-1°,490,510;I,S,C(CN)2, ,Me, ,benzo, ,1,0,0, ,55,265-7°,550,575;I,CH:CH:,C(CN)2, ,Et, , , ,1,0,0, ,19,227-8°, , ;I,S,C(CN)2, ,Et,Me,benzo, ,1,0,1, ,1,191-3°, , ;I,S,C(CN)2, ,Et, , , ,0,1,0, ,46,256-8°, , ;I,S,C(CN)2,Et,H, , ,0,1,2, ,22,228-30°, , ;I,O,C(CN)2, ,Et,H, , ,0,1,1, ,28,214-15°, , ;I,S,A, ,Me, , , ,0,1,0, ,12,272-3°, , ;I,S,C(CN)2, ,Me, , , ,2,0,0, ,76,232-3°, ,555;I,S,C(CN)2, ,Me, ,benzo, ,2,0,0, ,80,289-90°,555,580; I,CH:CH,C(CN)2, ,Et, , , ,2,0,0, ,33,285-6°, , ;I,O,C(CN)2, ,Et,H, , ,2,0,1, ,19,213-14°,600,690;I,S,C(CN)2, ,Me,H, , ,2,0,1, ,5,231-2°,580,690;I,O,B, ,Et,H, , ,1,0,1, ,4,192-7°, , ;I,S,B, ,Et,H,benzo, ,1,0,1, ,8,169-70°, , ;I,S,C(CM)2, ,Et, , , ,1,1,0, ,54,254-6°, , ;I,S,C(CN)2, ,Et, ,benzo, ,1,1,0, ,4,222-5°, , ;I,S,C(CN)2, ,Et,H, , ,1,1,1, ,8,218-25°, , ;II,S,C(CN)2,S,Et,Et, , , , ,2,2,13,237-8°,630,690;II,S,C(CN)2,S,Et,Et, , , , ,1,2,35,244-5°,810,840;II,O,C(CN)2,S,Et,Et, , , , ,1,1,45,255-6°,685,730;II,S,A,S,Me,Et, , , , ,0,2,27,285-6°,730,810;II,S,A,S,Me,Me, , , , ,0,0,28,>310°, , ;II,S,A,S,Et,Et, , , , ,1,1,61,>310°,750,770;II,O,A,O,Et,Et, , , , ,1,1,41,280-1°,680,720;II,S,A,S,Me,Me,benzo,benzo, , ,0,0,62,241-3°,590,620;II,S,C(CN)2,S,Me,Me, , , , ,0,0,32,>310,565,610;II,S,A,S,Me,Me, ,benzo, , ,0,0,54,231-2°,555,575; The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).SDS of cas: 2510-01-2

2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas:2510-01-2) belongs to nitriles. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.SDS of cas: 2510-01-2

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Campaigne, E.; Subramanya, R.; Maulding, Donald R. published an article in 1963, the title of the article was Ring closure of ylidenemalononitriles. II. Steric effect of a ring at the β position.Synthetic Route of 2510-01-2 And the article contains the following content:

cf. CA 58, 4481b. Heating 1-indanylidenemalononitrile in concentrated sulfuric or polyphosphoric acid yielded the I. Using similar conditions, ring closure of 1-benzosuberylidenemalononitrile to II was effected. Structural assignment on the basis of the infrared and ultraviolet spectra of these and related compounds was given. The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).Synthetic Route of 2510-01-2

2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas:2510-01-2) belongs to nitriles. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.Synthetic Route of 2510-01-2

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Weiler-Feilchenfeld, Hannah; Agranat, Israel; Bergmann, Ernst D. published an article in 1966, the title of the article was Dipole moments of substituted 1,1-dicyanoethylenes.Application of 2510-01-2 And the article contains the following content:

The dipole moments of a number of 2-substituted 1,1-dicyanoethylenes have been measured. The moments are explained by a combination of 2 effects, partial charge separation and compression of the C(CN)2 angle. From the data obtained with ω,ω-dicyanofulvenes it is concluded that in compounds such as I and II, pseudoarom. structures (such as Ia and IIa contribute to the ground state of the mols. 31 references The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).Application of 2510-01-2

2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas:2510-01-2) belongs to nitriles. Some nitriles are manufactured by heating carboxylic acids with ammonia in the presence of catalysts. This process is used to make nitriles from natural fats and oils, the products being used as softening agents in synthetic rubbers, plastics, and textiles and for making amines.Application of 2510-01-2

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

On October 31, 2003, Elinson, M. N.; Fedukovich, S. K.; Vereshchagin, A. N.; Dorofeev, A. S.; Dmitriev, D. E.; Nikishin, G. I. published an article.Application of 2510-01-2 The title of the article was Electrocatalytic transformation of malononitrile and cycloalkylidenemalononitriles into spirobicyclic and spirotricyclic compounds containing 1,1,2,2-tetracyanocyclopropane fragment. And the article contained the following:

The electrolysis of malononitrile and cycloalkylidenemalononitriles, e.g. I, to afford spirocyclic compounds containing a 1,1,2,2-tetracyanocyclopropane fragment, e.g. II, in 50-88% yields, is reported. A plausible mechanism is proposed. The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).Application of 2510-01-2

The Article related to spirocyclic compound tetracyanocyclopropane preparation electrolysis malononitrile cycloalkylidenemalononitrile reaction mechanism, Alicyclic Compounds: Spiro Compounds and other aspects.Application of 2510-01-2

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

On August 31, 1980, Sandberg, Rune; Domeij, Karl-Erik; Stening, Goeran; Willman, Nils; Aekerman, Bengt published an article.Recommanded Product: 2510-01-2 The title of the article was N-Aminoalkylsuccinimides as local anesthetics. III. 1,2,3,4-Tetrahydronaphthalene-2-, indane-1-, and indane-2-spiro-3′-pyrrolidine-2-‘5-diones. And the article contained the following:

In a series of N-aminoalkylindanespirosuccinimides, compounds with the spiro-atom in the 2-position possessed a higher local anesthetic potency and toxicity than the corresponding spiro-1-indanes. Similar differences in potency and toxicity were seen between tetralin-1- and tetralin-2-spirosuccinimides. Most of the new compounds were more active by topical application than lidocaine but also more toxic. The tetrahydronaphthalene derivative I [75639-71-3] compared favorable with prilocaine both regarding low toxicity and good nerve blocking properties but displayed local irritation. The experimental process involved the reaction of 2-(2,3-Dihydro-1H-inden-1-ylidene)malononitrile(cas: 2510-01-2).Recommanded Product: 2510-01-2

The Article related to naphthalenespiropyrrolidinedione local anesthetic, indanspiropyrrolidinedione local anesthetic, aminoalkylsuccinimide local anesthetic, Pharmacodynamics: Effects On Mammals and other aspects.Recommanded Product: 2510-01-2

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts