Statistics shows that 4-(4-(Dimethylamino)-1-(4-fluorophenyl)-1-hydroxybutyl)-3-(hydroxymethyl)benzonitrile is playing an increasingly important role. we look forward to future research findings about 103146-25-4.
Synthetic Route of 103146-25-4, These common heterocyclic compound, 103146-25-4, name is 4-(4-(Dimethylamino)-1-(4-fluorophenyl)-1-hydroxybutyl)-3-(hydroxymethyl)benzonitrile, 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.
10.0g of 4-(4-fluoro-benzoyl)-3-hydroxymethyl-benzonitrile (MW: 255.25, assay: 96.7%; 37.9mmol) are dissolved in 14OmL of toluene. 7.77g of (S)-2-lambda/,lambda/-dimethylaminophenylethanol (MW: 165.24, 47.0mmol, 1.24 eq.) and 2.51g of methylboronic acid (MW: 59.86, assay: 98%, 41.1mmol, 1.08eq.) are added. The solution becomes slightly turbid and drops of water are rapidly formed. The mixture is heated to 500C. At reduced pressure (~60-70mbar) -10OmL of toluene / water are carefully removed. 10OmL of toluene are added and -10OmL of toluene / water are removed. 12OmL of toluene are added and about -2OmL of toluene / water are removed to get a solution of mixed boronate (~80mmol) in about 25OmL of solvent. The water content is below 0.1% as determined by a Karl Fischer titration. The reaction is cooled to – 65C. Within about 10-20 minutes 38.OmL of a -2M solution of dimethylaminopropyl magnesiumchloride in THF (-2 eq.) are added. Thereby, the temperature does not exceed -500C. The solution is stirred for another 30 minutes. Reaction control is performed with HPLC (ee = 90%). After complete conversion (area% 4-(4-fluoro-benzoyl)-3-hydroxymethyl-benzonitrile <2%) the reaction is worked up.2OmL of water are and 35mL of 2M aqueous H2SO4 (70mmol) are added to get a pH of -1.5 in the aqueous layer. After phase separation, the organic layer is washed once with 2OmL water, adjusted to pH 1 with 2M aqueous H2SO4. 15OmL of CH2CI2 are added to the combined aqueous layers. 7M aqueous NH3 is now added (29mL) until a pH of -9.0 is reached. After phase separation the aqueous layer is washed twice with 25mL of MED (at pH 9.0). The combined CH2CI2 layers are washed with 15mL of water. 7OmL of H2O are added. 10.7mL of 2M aqueous H2SO4 are added to adjust the pH to 6.4. After stirring for 10 minutes the layers are separated (pH 6.4). 35mL of water are added to the CH2CI2 layer. Addition of 1.5mL of 2M aqueous H2SO4 gives a pH of 6.4. After stirring for 10 minutes the layers are separated. 8OmL of CH2CI2 are added to the combined aqueous layers. Addition of 2mL of 7M aqueous RG/G-50021-BCK9987NH3 gives a pH of 6.4 (after equilibration). The layers are separated. The combined organic layers are washed with 2OmL of water. The layers are separated. The combined CH2CI2 layer contains the enantiomerically enriched diol. The combined aqueous layer contains -90% of the chiral auxiliary. 20OmL of CH2Cl2 are removed. 6OmL of 2-propanol are added. 3OmL of 2-propanol / CH2CI2 are removed under reduced pressure. 3OmL of 2-propanol are added to obtain -13g of CIT-DIOL in 6OmL of ISO. To this solution 6.59g of (+)-ditoluoyl tartaric acid (MW: 386.36; assay: 99%; 17.1mmol, 0.45eq.), dissolved in 42mL of 2-propanol and 8mL of CH2CI2, are added. The product starts to crystallize after 5 minutes (or immediately after seeding). The mixture is stirred for 90 minutes at 35C, for 10 minutes at 600C and than slowly cooled down to room temperature (within ~5hours) and crystallized without stirring for 10 hours. The product is isolated by filtration to give 17.2g of S-CIT-DIOLlambda’ (+)-DTTA.lambda1 ISO.lambda1 H2O (yield: 81.0%; ee: 99.0%, assay: 61.0%) after drying for IOhours at 400C and 20mbar.
Statistics shows that 4-(4-(Dimethylamino)-1-(4-fluorophenyl)-1-hydroxybutyl)-3-(hydroxymethyl)benzonitrile is playing an increasingly important role. we look forward to future research findings about 103146-25-4.
Reference:
Patent; SANDOZ AG; WO2007/82771; (2007); A1;,
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts