Piperidine → 2-[4-(4-Amino-piperidine-1-carbonyl)-phenylamino]-9-cyclobutyl-7,7-difluoro-5-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one

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Reaction Steps

A mixture of 0.220 g (0.31 mmole) of {1-[4-(9-cyclobutyl-7,7-difluoro-5-methyl-6-oxo-6,7,8,9-tetrahydro-5H-pyrimido[4,5-b][1,4]diazepin-2-ylamino)-benzoyl]-piperidin-4-yl}-carbamic acid 9H-fluoren-9-ylmethyl ester, 1 mL of piperidine and 5 mL of dichloromethane was stirred for 1 hour and then concentrated under reduced pressure. The residue was purified by silica gel chromatography, eluting with dichloromethane-methanol-ammonium hydroxide (92:8:0.3) to give 0.038 g of 2-[4-(4-amino-piperidine-1-carbonyl)-phenylamino]-9-cyclobutyl-7,7-difluoro-5-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one (I-15).

Provenance & Evidence