1-Piperidinecarbonyl chloride → ((3R,4R)-3-(6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)-4-methylpiperidin-1-yl)(piperidin-1-yl)methanone

Participants

Reaction Steps

A round bottom flask was charged with 1-((3R,4R)-4-methylpiperidin-3-yl)-6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazine hydrochloride (0.050 g, 0.17 mmol, Example #5, Step J), TEA (0.10 mL, 0.69 mmol) in THF (1.6 mL). The reaction mixture was stirred for about 5 min at ambient temperature and then piperidine-1-carbonyl chloride (0.019 g, 0.13 mmol) was added. The reaction was heated at about 45° C. for about 18 h, cooled to ambient temperature, and concd under reduced pressure. The crude product was dissolved in DCM (5 mL) and washed with water (3 mL), dried over anhydrous MgSO4, filtered, and concd under reduced pressure. The material was purified by RP-HPLC (Table 1, Method f) to give ((3R,4R)-3-(6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)-4-methylpiperidin-1-yl)(piperidin-1-yl)methanone (0.018 g, 8%): LC/MS (Table 1, Method b) Rt=1.80 min; MS m/z 367 (M+H)+.

Provenance & Evidence