Month: April 2021

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 403-54-3, name is 3-Fluorobenzonitrile, This compound has unique chemical properties. The synthetic route is as follows., HPLC of Formula: C7H4FN

Example 19.1 : 3-Fluoro-N-hydroxy-benzamidine3-Fluorobenzonitrile (2.5 g, 0.021 mol), diisopropylethyl amine (10.8 mL, 0.062 mol) and hydroxylamine hydrochloride (4.3 g, 0.062 mol) were mixed in ethanol (30 mL). The reaction mixture was stirred at 70 0C overnight. The reaction mixture was cooled to room temperature and concentrated to half the original volume. The residue was added to a mixture of dichloromethane (200 mL) and water (60 mL). The mixture was basified to pH 9 using 2N NaOH and the organic phase was separated. The aqueous phase was extracted further with dichloromethane (2 x 50 mL) and the combined organic phase was washed with water (75 mL), washed with brine (75 mL), dried over sodium sulfate and concentrated to give the product as a yellow solid (2.8 g, 89 %). 1H NMR (300 MHz, CDCI3): delta 8.05 (bs, 1 H), 7.39 (m, 3H), 7.16 (m, 1 H), 4.88 (bs, 2H).

According to the analysis of related databases, 403-54-3, the application of this compound in the production field has become more and more popular.

In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 610-66-2 as follows. name: 2-(2-Nitrophenyl)acetonitrile

A suspension of (2-nitrophenyl)-acetonitrile (30 g, 185 mmol) and 10% palladium on carbon (2 g) in acetic acid (450 mL) was hydrogenated in a Parr apparatus under 30 psi pressure at ambient temperature for 2 hours. The mixture was filtered through a Celite pad and the filtrate was concentrated in vacuo. The obtained residue was dissolved in ethyl acetate (250 mL). The resulting solution was washed with water (2*100 mL) and saturated sodium chloride (50 mL), and then dried over anhydrous sodium sulfate and concentrated in vacuo to yield product. The crude material was purified by column chromatography (100-200 mesh silica gel) using 8% ethyl acetate in petroleum ether as eluent to afford (2-aminophenyl)acetonitrile (13.5 g, 55%) as a solid. 1HNMR (CDCl3) delta ppm 7.3-7.1 (m, 2H), 6.9-6.7 (m, 2H), 3.7 (br, 2H), 3.5 (s, 2H).

According to the analysis of related databases, 610-66-2, the application of this compound in the production field has become more and more popular.

Application of 3759-28-2,Some common heterocyclic compound, 3759-28-2, name is 2-(Cyanomethyl)benzonitrile, molecular formula is C9H6N2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

100ml of water was added to the reaction vessel, 20mmol (o-cyanophenyl)acetonitrile, 50mmolof potassium (naphthalene-2-yl)trifluoroborate, 0.8mmol palladium acetylacetonate, 2mmol nitrogen ligands L-1, and p-toluenesulfonic acid monohydrate 150mmol at 100 deg.] C under stirring for 20 hours.After completion of the reaction, the mixture was poured into ethyl acetate, sequentially with saturated NaHCO3aqueoussolution and brine, the aqueous layer was extracted with ethyl acetate, the combined organic layers (i.e., wash the combinedorganic layer and the extract obtained after the organic layer), dried over anhydrous of Na2the SO4dried, vacuum evaporatedsolvent was removed and the residue was purified by flash column chromatography (hexane / ethyl acetate, volume ratio of between1: 1) to give the desired product as a solid .The yield was 59.6%,% purity was 98.4(the HPLC).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-(Cyanomethyl)benzonitrile, its application will become more common.

These common heterocyclic compound, 1080-74-6, name is 2-(3-Oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. name: 2-(3-Oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile

Then F (1.07 g, 1.5 mmol) was dissolved in chloroform.G (1.16g 6mmol) was added and 1mL of pyridine was added as a catalyst. The reaction was carried out at reflux temperature of chloroform for 12 hours. After the reaction was completed, water was added three times with dichloromethane, and the solvent such as dichloromethane was removed by rotary evaporation.The crude product was obtained and purified further by silica gel column chromatography.Using petroleum ether/dichloromethane 1:1 (v/v) as an eluent, a blue-black solid (1.41 g, yield 88%) was obtained as the object compound M2.

The synthetic route of 2-(3-Oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile has been constantly updated, and we look forward to future research findings.

Reference of 330793-38-9, These common heterocyclic compound, 330793-38-9, name is 4-Bromo-2-methoxybenzonitrile, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

b) 4-Bromo-2-methoxybenzoic acid 4-Bromo-2-methoxybenzonitrile (7.35 g, 35 mmol) was dissolved in dioxane (400 mL). Sodium hydroxide (2.0 N, 200 mL) was added and the suspension was heated at 100° C. for 16 hours. Organic solvent was removed under reduced pressure and the aqueous mixture was filtered and washed with water. The filtrate was neutralized with hydrochloric acid (5.0N) to pH 1. The solid was collected by filtration to give 4-bromo-2-methoxybenzoic acid (3 g, 37percent). 1H NMR (DMSO-d6) delta 3.84(s, 3H), 7.21 (d, J=8.25 Hz, 1H), 7.33 (s, 1H), 7.58 (d, J=8.23 Hz, 1H).

Statistics shows that 4-Bromo-2-methoxybenzonitrile is playing an increasingly important role. we look forward to future research findings about 330793-38-9.

Adding a certain compound to certain chemical reactions, such as: 35202-54-1, name is 4,5-Dimethoxy-1-cyanobenzocyclobutane, belongs to nitriles-buliding-blocks compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 35202-54-1, name: 4,5-Dimethoxy-1-cyanobenzocyclobutane

EXAMPLE 4 (R,S)-3,4-Dimethoxy-bicyclo[4.2.0]octa-4,3,5-triene-7-carbaldehyde 10 g (52.8 mmol) of 3,4-dimethoxy-bicyclo[4.2.0]octa-1,3,5-triene-7-carbonitrile are dissolved in 100 ml of anhydrous toluene. The solution is cooled to -78° C. and then 55 ml of diisobutylaluminum hydride solution (1.2M in toluene) are added dropwise while maintaining the temperature below -65° C. (addition time=45 minutes). Stirring is carried out for 1 hour at -78° C. once the addition is complete. Hydrolysis is carried out by adding dropwise 20 ml of methanol. The temperature is allowed to return to -30° C. and then the reaction mixture is added to 200 ml of HCl (0.1N) and extraction with ether is carried out twice. The organic phase is washed in succession with water and saturated aqueous NaCl solution and then dried over MgSO4, filtered and evaporated to dryness to obtain 8 g of title product in the form of pale yellow oil. Yield=79percent IR (pure): nu=2714, 2630, 1712 cm-1.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 4,5-Dimethoxy-1-cyanobenzocyclobutane, other downstream synthetic routes, hurry up and to see.

Adding a certain compound to certain chemical reactions, such as: 268734-34-5, name is Methyl 4-cyano-3-fluorobenzoate, belongs to nitriles-buliding-blocks compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 268734-34-5, COA of Formula: C9H6FNO2

EXAMPLE 52B 2-fluoro-4-(hydroxymethyl)benzonitrile A solution of Example 52A (1.0 g, 5.58 mmol) in THF (20 mL) at room temperature was treated with a solution of CaCl2 (1.24 g, 11.16 mmol) in ethanol (20 mL). The resulting solution was treated with NaBH4 (845 mg, 22.33 mmol) over 20 minutes, stirred for 1.25 hours, then slowly quenched with saturated ammonium chloride (100 mL), and concentrated. The remaining aqueous portion was extracted with ethyl acetate (3*100 mL) and the combined extracts were dried (MgSO4), filtered, and concentrated to provide the desired product. MS (APCI) m/z 169 (M+NH4)+; 1H NMR (300 MHz, CDCl3) delta7.60 (t, 1H), 7.29-7.23 (m, 2H), 4.80 (s, 2H).

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, Methyl 4-cyano-3-fluorobenzoate, other downstream synthetic routes, hurry up and to see.

In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 67515-59-7, name is 4-Fluoro-3-(trifluoromethyl)benzonitrile belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. SDS of cas: 67515-59-7

A mixture of 4-fluro 3-trifluro-methylbenzonitrile (5 g, 26.4 mmol) and 2-methylpiperidine (6.25 ml_, 52.9 mmol) was heated at 10O C under N2 for 12h.The reaction mixture was diluted with water (100 ml_) and was extracted with EtOAc (2chi100ml_). The organic layer was washed with water (2chi100mL) and brine solution (10OmL). The solvent was dried over sodium sulphate and concentrated. The residue was purified by flash chromatography using silica-gel (60-120 mesh) and pet-ether /EtOAc as eluent to afford the title compound as an off-white solid. 1H NMR (CDCI3, 400 MHz) delta 7.87 (s, 1 H), 7.71 -7.74 (d, 1 H), 7.50 (bs, 1 H), 2.95-3.03 (m, 2H), 2.49-2.54 (m, 1 H), 1.71 -1 .77 (m, 3H), 1 .58-1.59 (m, 1 H), 1.36-1.39 (m, 2H), 0.75-0.77 (d, 3H). HPLC (Method C) Rt 5.09 min (Purity: 98.8%).

The synthetic route of 67515-59-7 has been constantly updated, and we look forward to future research findings.

In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 42872-74-2, name is 3-Bromo-4-methylbenzonitrile belongs to nitriles-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Application In Synthesis of 3-Bromo-4-methylbenzonitrile

A solution of 3-bromo-4-methylbenzonitrile (1 g), acetamidine hydrochloride (714 mg), cesium carbonate (5 g) and copper (I) bromide (36 mg) in dry dimethyl sulfoxide (25 mL) was stirred at 120 C. for 3 h. The mixture was chilled, diluted with EtOAc (200 mL) and washed with water. The organic layer was dried and the volatiles were removed under reduced pressure. The residue was purified by chromatography (SiO2, 150 g, DCM/MeOH) to yield the desired product (36% yield). LC-MS (Method 1): m/z [M+H]+=252.1 (MW calc.=252.11); Rt=3.5 min.

The synthetic route of 42872-74-2 has been constantly updated, and we look forward to future research findings.

Application of 103146-25-4, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 103146-25-4 name is 4-(4-(Dimethylamino)-1-(4-fluorophenyl)-1-hydroxybutyl)-3-(hydroxymethyl)benzonitrile, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

350 ml of isopropyl alcohol was charged to the residue and heated and stirred, then cooled to room temperature. 35 gm of (+)-DPTTA was added to the above solution and stirred for one hour at room temperature to isolation of the solid. The reaction mixture was heated to about 40-45 C, stirred for about 2 hours. The reaction mixture was cooled to room temperature, filtered the solid and dried to get 39 gm of the title compound.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 4-(4-(Dimethylamino)-1-(4-fluorophenyl)-1-hydroxybutyl)-3-(hydroxymethyl)benzonitrile, and friends who are interested can also refer to it.