1-Hydroxybenzotriazole → 4-[(9-cyclopentyl-6,7,8,9-tetrahydro-5-methyl-6-oxospiro[5H-pyrimido[4,5-b][1,4]diazepine-7,1'-cyclopropan]-2-yl)amino]-3-methyl-N-(1-methyl-4-piperidinyl)benzamide

Participants

Reaction Steps

To a suspension of 0.0262 g (0.000062 mole) of 4-[(9-cyclopentyl-6,7,8,9-tetrahydro-5-methyl-6-oxospiro[5H-pyrimido[4,5-b][1,4]diazepine-7,1′-cyclopropan]-2-yl)amino]-3-methylbenzoic acid (I-60) in 3 mL of dimethylformamide was added 0.0144 g (0.000107 mole) of 1-hydroxybenzotriazole, 0.0365 g (0.000096 mole) of 1-[bis(dimethylamino)methylene]-1H-benzotriazolium 3-oxide hexafluorophosphate and 0.07 mL (0.000402 mole) of ethyldiisopropylamine. The mixture was stirred for 20 minutes and then 0.012 g (0.0001 mole) of 4-amino-1-methylpiperidine was added. The mixture was stirred for an additional 2.5 hours and then concentrated under reduced pressure. The residue was dissolved in ethyl acetate and washed successively with 1 M sodium hydroxide, brine, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by silica gel chromatography, eluting with dichloromethane-methanol (98:2-80:20) to give 0.021 g of 4-[(9-cyclopentyl-6,7,8,9-tetrahydro-5-methyl-6-oxospiro[5H-pyrimido[4,5-b][1,4]diazepine-7,1′-cyclopropan]-2-yl)amino]-3-methyl-N-(1-methyl-4-piperidinyl)benzamide (I-61)

Provenance & Evidence