反应详情

A mixture of 0.08 g (0.25 mmole) of 2-chloro-9-cyclopentyl-7,7-difluoro-5-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one (VII-20) and 0.075 g (0.25 mmole) of 4-amino-N-[1-(2-fluoro-ethyl)-piperidin-4-yl]-3-methoxy-benzamide and 0.072 g (0.38 mmole) of p-toluenesulfonic acid monohydrate in 3 mL of isopropanol was stirred in a sealed tube at 140 degrees overnight. The mixture was cooled, and dichloromethane and saturated sodium carbonate were added. The mixture was extracted twice with dichloromethane. The combined organic layers were washed three times with sodium carbonate three times with brine, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. Purification by silica gel chromatography, eluting with dichloromethane-methanol (gradient, 100:0-90:10) gave 0.080 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)-N-[1-(2-fluoro-ethyl)-piperidin-4-yl]-3-methoxy-benzamide (I-75).

1. temperatureThe mixture was cooled
2. extractionThe mixture was extracted twice with dichloromethane
3. washThe combined organic layers were washed three times with sodium carbonate three times with brine
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customPurification by silica gel chromatography
8. washeluting with dichloromethane-methanol (gradient, 100:0-90:10)