2-(trifluoromethyl)-1H-indole-5-carbonitrile → (2-(Trifluoromethyl)-1h-indol-5-yl)methanamine

A solution of 2-trifluoromethyl-1H-indole-5-carbonitrile (Intermediate 3, 0.16 g, 0.761 mmol) in tetrahydrofuran (5 ml) cooled in an ice-water bath, was treated with a 1M solution of borane tetrahydrofuran complex (3.05 ml, 3.05 mmol) dropwise via syringe. The reaction mixture was then left to stir under argon for 18 hrs while allowing it to warm to room temperature. The reaction mixture was then quenched with methanol (10 mL) and stirred at room temperature for 10 min. The reaction mixture was then poured onto a SCX cartridge (10 g) and washed well with methanol. The desired product was then eluted using 2M ammonia/methanol solution. Evaporation to dryness gave the title compound which was used in the next step without further purification.

1. waitThe reaction mixture was then left
2. customThe reaction mixture was then quenched with methanol (10 mL)
3. stirringstirred at room temperature for 10 min
4. additionThe reaction mixture was then poured onto a SCX cartridge (10 g)
5. washwashed well with methanol
6. washThe desired product was then eluted
7. customEvaporation to dryness

ORD record

ord-21e994dab0cb4188859efb80266db0b0

Source dataset

uspto-grants-2013_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08377941B2