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-methoxy-N-(1-methyl-4-piperidinyl)benzamide

Participants

Reaction Steps

To a suspension of 0.2463 g (0.000563 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-methoxybenzoic acid (I-53) in 15 mL of dimethylformamide was added 0.1222 g (0.00091 mole) of 1-hydroxybenzotriazole, 0.3307 g (0.00087 mole) of 1-[bis(dimethylamino)methylene]-1H-benzotriazolium 3-oxide hexafluorophosphate and 0.59 mL (0.00339 mole) of ethyldiisopropylamine. The mixture was stirred for 20 minutes and then 0.0980 g (0.00086 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 0.166 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-methoxy-N-(1-methyl-4-piperidinyl)benzamide (I-54).

Provenance & Evidence