反应详情

A mixture of 0.11 g (0.30 mmole) of 2-chloro-7,7-difluoro-9-(4-methoxy-benzyl)-5-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one (VII-291), 0.088 g (0.22 mmole) of 4-amino-3-methoxy-N-(1-methyl-piperidin-4-yl)-benzamide, 0.062 g (0.33 mmole) of p-toluenesulfonic acid monohydrate and 4 mL of isopropanol was heated in pressure tube at 140 degrees overnight. After cooling, dichloromethane and saturated sodium carbonate were added. The mixture was extracted with dichloromethane twice. 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, 100:0-60:40) gave 0.13 g of 4-[7,7-difluoro-9-(4-methoxy-benzyl)-5-methyl-6-oxo-6,7,8,9-tetrahydro-5H-pyrimido[4,5-b][1,4]diazepin-2-ylamino]-3-methoxy-N-(1-methyl-piperidin-4-yl)-benzamide (I-291) as a white solid.

1. temperaturewas heated in pressure tube at 140 degrees overnight
2. temperatureAfter cooling
3. extractionThe mixture was extracted with dichloromethane twice
4. washThe combined organic layers were washed three times with sodium carbonate, three times with brine
5. dry with materialdried over anhydrous sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customPurification by silica gel chromatography
9. washeluting with dichloromethane-methanol (gradient, 100:0-60:40)