反应详情

温度

-30 °C

To a solution of the oil prepared in Example 3 in 100 ml of tetrahydrofuran, cooled at -30° C. with external cooling, was added dropwise 1.7 ml of ammonia. After stirring at -30° C. for about 15 minutes, the suspension was purged with N2 to remove excess ammonia, then evaporated at less than 30° C. under vacuum. After adding ice-water to the residue, the suspension was extracted with methylene chloride, dried (MgSO4) and evaporated under vacuum. The residue was triturated with hexane to yield 2.5 g of the subject compound as a crude solid, m.p. 155° to 158° C., NMR(CDCl3 +DMSO):

1. customthe suspension was purged with N2
2. customto remove excess ammonia
3. customevaporated at less than 30° C. under vacuum
4. additionAfter adding ice-water to the residue
5. extractionthe suspension was extracted with methylene chloride
6. dry with materialdried (MgSO4)
7. customevaporated under vacuum
8. customThe residue was triturated with hexane