2-methyl-3-(trifluoromethyl)benzaldehyde

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a sol. of 2-methyl-3-trifluoromethylbenzyl alcohol (0.500 g, 2.63 mmol) in CH2Cl2 (25 mL) was added activated MnO2 (2.29 g, 26.3 mmol). After stirring for 72 h, the mixture was filtered over Celite, and the solvents were removed under reduced pressure. The aldehyde is used in the next step without further purification. 1H NMR (CDCl3) δ 10.40 (s, 1H), 8.00 (d, 1H), 7.85 (d, 1H), 7.45 (t, 1H), 2.8 (s, 3H). the mixture was filtered over Celite the solvents were removed under reduced pressure The aldehyde is used in the next step without further purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of malononitrile (2.352 g, 35.6 mmol) in 95% Ethanol (50 mL) was added 2-methyl-3-(trifluoromethyl)benzaldehyde (6.7 g, 35.6 mmol). The reaction was stirred at rt for 18 h. Additional EtOH (20 mL) was added and the mixture was stirred for 20 minutes and cooled to 0° C. in an ice bath. Sodium borohydride (0.364 g, 9.61 mmol) was introduced to the vigorously stirred mixture and the reduction was complete in about 10 min. To the reaction mixture was added water (40 mL). 1N HCl was added in to quench the excess hydride. More water was added in until precipitation was complete. Filtration gave {[2-methyl-3-(trifluoromethyl)phenyl]methyl}propanedinitrile (6.5 g, 77%). To a mixture of {[2-methyl-3-(trifluoromethyl)phenyl]methyl}propanedinitrile (6.5 g, 27.3 mmol) in Ethanol (80 mL) was added hydrazine hydrate (2.68 mL, 54.6 mmol). The reaction mixture was heated at reflux temperature for 8 h. The reaction mixture was concentrated. The crude material was purified on a silica column (eluting with MeOH/DCM: 0˜10%) to give the product (3.5 g, 47%). 1H NMR (400 MHz, METHANOL-d4) δ ppm 2.47 (s, 3H) 3.69 (s, 2H) 7.11-7.37 (m, 2H) 7.51 (d, 1H); LC/MS: MS (ES+) m/e 271.2 [M+H]+. the mixture was stirred for 20 minutes cooled to 0° C. in an ice bath the reduction was complete in about 10 min to quench the excess hydride More water was added in until precipitation Filtration

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-methyl-3-(trifluoromethyl)benzaldehyde (3.0 g, 16 mmol) and 3,3-bis(ethyloxy)propanenitrile (2.3 g, 20 mmol) in methanol (10 mL) was added a 25% sodium methoxide in methanol over 20 minutes. The mixture was stirred at room temperature overnight. Most of solvent was evaporated in vacuo and the residue was dissolved with ethyl acetate (30 mL) and water (15 mL). Two layers were separated. Organic layer was separated, washed with brine (15 mL), dried and solvent was evaporated in vacuo. The residue was then purified to give product. (3.66 g, 64%); 1H NMR (400 MHz, DMSO-d6) δ ppm 2.40 (s, 3H) 2.94 (m, J=11.37 Hz, 1H) 3.08 (m, J=4.80 Hz, 1H) 3.20 (s, 1H) 3.43 (d, J=10.36 Hz, 1H) 3.42 (d, J=11.12 Hz, 6H) 3.45-3.52 (m, 1H) 4.60 (d, J=4.80 Hz, 1H) 7.39 (t, J=7.71 Hz, 1H) 7.59 (dd, J=17.18, 7.83 Hz, 2H). Most of solvent was evaporated in vacuo the residue was dissolved with ethyl acetate (30 mL) and water (15 mL) Two layers were separated Organic layer was separated washed with brine (15 mL) dried solvent was evaporated in vacuo The residue was then purified to give product

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-methyl-3-(trifluoromethyl)benzaldehyde (3.0 g, 16 mmol) and 3,3-bis(ethyloxy)propanenitrile (2.3 g, 20 mmol) in methanol (10 mL) was added a 25% sodium methoxide in methanol over 20 minutes. The mixture was stirred at room temperature overnight. Most of solvent was evaporated in vacuo and the residue was dissolved with ethyl acetate (30 mL) and water (15 mL). Two layers were separated. Organic layer was separated, washed with brine (15 mL), dried and solvent was evaporated in vacuo. The residue was then purified to give product. (3.66 g, 64%); 1H NMR (400 MHz, DMSO-d6) δ ppm 2.40 (s, 3H) 2.94 (m, J=11.37 Hz, 1H) 3.08 (m, J=4.80 Hz, 1H) 3.20 (s, 1H) 3.43 (d, J=10.36 Hz, 1H) 3.42 (d, J=11.12 Hz, 6H) 3.45-3.52 (m, 1H) 4.60 (d, J=4.80 Hz, 1H) 7.39 (t, J=7.71 Hz, 1H) 7.59 (dd, J=17.18, 7.83 Hz, 2H). Most of solvent was evaporated in vacuo the residue was dissolved with ethyl acetate (30 mL) and water (15 mL) Two layers were separated Organic layer was separated washed with brine (15 mL) dried solvent was evaporated in vacuo The residue was then purified to give product

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a sol. of 2-methyl-3-trifluoromethylbenzyl alcohol (0.500 g, 2.63 mmol) in CH2Cl2 (25 mL) was added activated MnO2 (2.29 g, 26.3 mmol). After stirring for 72 h, the mixture was filtered over Celite, and the solvents were removed under reduced pressure. The aldehyde is used in the next step without further purification. 1H NMR (CDCl3) δ 10.40 (s, 1H), 8.00 (d, 1H), 7.85 (d, 1H), 7.45 (t, 1H), 2.8 (s, 3H). the mixture was filtered over Celite the solvents were removed under reduced pressure The aldehyde is used in the next step without further purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of malononitrile (2.352 g, 35.6 mmol) in 95% Ethanol (50 mL) was added 2-methyl-3-(trifluoromethyl)benzaldehyde (6.7 g, 35.6 mmol). The reaction was stirred at rt for 18 h. Additional EtOH (20 mL) was added and the mixture was stirred for 20 minutes and cooled to 0° C. in an ice bath. Sodium borohydride (0.364 g, 9.61 mmol) was introduced to the vigorously stirred mixture and the reduction was complete in about 10 min. To the reaction mixture was added water (40 mL). 1N HCl was added in to quench the excess hydride. More water was added in until precipitation was complete. Filtration gave {[2-methyl-3-(trifluoromethyl)phenyl]methyl}propanedinitrile (6.5 g, 77%). To a mixture of {[2-methyl-3-(trifluoromethyl)phenyl]methyl}propanedinitrile (6.5 g, 27.3 mmol) in Ethanol (80 mL) was added hydrazine hydrate (2.68 mL, 54.6 mmol). The reaction mixture was heated at reflux temperature for 8 h. The reaction mixture was concentrated. The crude material was purified on a silica column (eluting with MeOH/DCM: 0˜10%) to give the product (3.5 g, 47%). 1H NMR (400 MHz, METHANOL-d4) δ ppm 2.47 (s, 3H) 3.69 (s, 2H) 7.11-7.37 (m, 2H) 7.51 (d, 1H); LC/MS: MS (ES+) m/e 271.2 [M+H]+. the mixture was stirred for 20 minutes cooled to 0° C. in an ice bath the reduction was complete in about 10 min to quench the excess hydride More water was added in until precipitation Filtration

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-methyl-3-(trifluoromethyl)benzaldehyde (3.0 g, 16 mmol) and 3,3-bis(ethyloxy)propanenitrile (2.3 g, 20 mmol) in methanol (10 mL) was added a 25% sodium methoxide in methanol over 20 minutes. The mixture was stirred at room temperature overnight. Most of solvent was evaporated in vacuo and the residue was dissolved with ethyl acetate (30 mL) and water (15 mL). Two layers were separated. Organic layer was separated, washed with brine (15 mL), dried and solvent was evaporated in vacuo. The residue was then purified to give product. (3.66 g, 64%); 1H NMR (400 MHz, DMSO-d6) δ ppm 2.40 (s, 3H) 2.94 (m, J=11.37 Hz, 1H) 3.08 (m, J=4.80 Hz, 1H) 3.20 (s, 1H) 3.43 (d, J=10.36 Hz, 1H) 3.42 (d, J=11.12 Hz, 6H) 3.45-3.52 (m, 1H) 4.60 (d, J=4.80 Hz, 1H) 7.39 (t, J=7.71 Hz, 1H) 7.59 (dd, J=17.18, 7.83 Hz, 2H). Most of solvent was evaporated in vacuo the residue was dissolved with ethyl acetate (30 mL) and water (15 mL) Two layers were separated Organic layer was separated washed with brine (15 mL) dried solvent was evaporated in vacuo The residue was then purified to give product