反应详情

A solution of 0.067 g (0.109 mmole) 4-[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)-3-fluoro-benzoylamino]-piperidine-1-carboxylic acid tert-butyl ester (I-229) in 3 mL of dichloromethane was stirred with 3 mL of trifluoroacetic acid for 2 hours and then concentrated under reduced pressure. The residue was dissolved in 80 mL of dichloromethane, washed with 15 mL of sodium carbonate solution, twice with 15 mL of brine and concentrated under reduced pressure. The residue was purified by reverse phase silica gel chromatography, eluting with water-acetonitrile (gradient, 90:10-0:100) to give 0.0533 g 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)-3-fluoro-N-piperidin-4-yl-benzamide (I-230) as a white solid.

1. concentrationconcentrated under reduced pressure
2. dissolutionThe residue was dissolved in 80 mL of dichloromethane
3. washwashed with 15 mL of sodium carbonate solution, twice with 15 mL of brine
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by reverse phase silica gel chromatography
6. washeluting with water-acetonitrile (gradient, 90:10-0:100)