名称:
A simple synthesis of N-acetyl-1,4-dihydropyrano[3,4-b]indol-3-one: Evidence for a stepwise ionic pathway in the generation of indole-2,3-quinodimethanes
摘要:
The fact that N-acetyl-1,4-dihydropyrano[3,4-b]indol-3-one, prepared from ethyl 2-methylindole-3-acetate in four steps, is inert towards thermal decarboxylation and that decarboxylation of other 1,4-dihydropyrano[3,4-b]indol-3-ones is accelerated by polar solvent and by electron-donating groups suggests that the decarboxylation is an ionic process. (C) 1997 Elsevier Science Ltd.