Diisopropylethylamine → HCID 67075977, compound

Participants

Reaction Steps

A mixture of 0.0801 g of the 2:1 mixture of 4-(9-cyclopentyl-7,7-difluoro-5-methyl-6-oxo-6,7,8,9-tetrahydro-5H-pyrimido[4,5-b][1,4]diazepin-2-ylamino)-2,3-difluoro-benzoic acid and 4-{4-[(2-carboxy-2,2-difluoro-ethyl)-cyclopentyl-amino]-5-methylamino-pyrimidin-2-ylamino}-2,3-difluoro-benzoic acid (from example 243) in 7 mL of dimethylformamide was treated with 0.154 g (0.393 mmole) of 1-[bis(dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium-3-oxide hexafluorophosphate and 0.1185 g (0.918 mmole) of diisopropylethylamine. After 15 minutes, 0.0328 g (0.256 mmole) of 4-amino-1-ethylpiperidine in 1 mL of dimethylformamide was added. The reaction mixture stirred for 30 minutes and then diluted with 150 mL of ethyl acetate and 25 mL of water. The mixture was then washed successively with 20 mL of ammonium chloride, 20 mL of saturated aqueous sodium bicarbonate, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. Purification by silica gel chromatography, eluting with dichloromethane-methanol (gradient, 95:5-80:20) gave 0.0651 g of 4-(9-cyclopentyl-7,7-difluoro-6-oxo-6,7,8,9-tetrahydro-5H-pyrimido[4,5-b][1,4]diazepin-2-ylamino)-N-(1-ethyl-piperidin-4-yl)-2,3-difluoro-benzamide (I-244) as a white solid.

Provenance & Evidence