Formic Acid → N,N-dicyclopropyl-6-ethyl-4-(1-ethyl-5-methyl-1H-pyrazol-3-ylamino)-1-methyl-1,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridine-7-carboxamide

Participants

Reaction Conditions

Reaction Steps

A mixture of (Z)-N,N-dicyclopropyl-6-ethyl-1-methyl-4-(1-(methylthio)-3-oxobut-1-enylamino)-1,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridine-7-carboxamide (example 74B, 70 mg, 0.155 mmol) and tert-butyl 1-ethylhydrazinecarboxylate (49.6 mg, 0.309 mmol) in acetic acid (1 mL) wan stirred at 35° C. for 4 h (monitored by LC/MS until no starting material left). Formic acid (1 mL) was added and the reaction mixture stirred at 60° C. for 6 h. The solvent was evaporated and the crude product was purified by flash chromatography on silica gel using an automated ISCO system (12 g column, eluting with 2-10% methanol/dichloromethane). The material was further purified by preparative HPLC to afford N,N-dicyclopropyl-6-ethyl-4-(1-ethyl-5-methyl-1H-pyrazol-3-ylamino)-1-methyl-1,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridine-7-carboxamide (38 mg, 53.4% yield) as an off-white solid.

Provenance & Evidence