Methanol → 5-(5-(3-(hydroxymethyl)-1H-pyrrol-1-yl)-4-(piperidin-3-ylmethylamino)pyridin-2-ylamino)pyrazine-2-carbonitrile

Participants

Reaction Conditions

Reaction Steps

tert-Butyl 3-((5-amino-2-(5-cyanopyrazin-2-ylamino)pyridin-4-ylamino)methyl)piperidine-1-carboxylate (37 mg, 0.074 mmol) (Synthesis 107-A) was dissolved in methanol (1.5 mL) and cooled to 0° C. Sodium borohydride (15 mg, 0.396 mmol) was added and the reaction was stirred at 0° C. for 4 h. The solution was evaporated and the residue was partitioned between water and dichloromethane. The two phases were separated and the aqueous phase was extracted with dichloromethane. The combined organic phases were evaporated and the residue was dissolved in methanol (1 mL) and absorbed onto a TsOH solid phase extraction cartridge. After 1.5 h the cartridge was eluted with 7M ammonia in methanol. The basic eluent was evaporated to dryness. The residue was purified by HPLC to give 5-(5-(3-(hydroxymethyl)-1H-pyrrol-1-yl)-4-(piperidin-3-ylmethylamino)pyridin-2-ylamino)pyrazine-2-carbonitrile (3.18 mg, 11%).

Provenance & Evidence