Synthesis of indoles via ring closure of 2-alkylnitroaniline derivatives
作者:Jan Bergman、Peter Sand
DOI:10.1016/s0040-4020(01)87932-1
日期:1990.1
A variety of nitroindoles have been prepared from imidate, amidine, and sec-anilide derivatives of 2-alkyl-3- or 5-nitroanilines by a base-induced cyclization promoted by dialkyl oxalates. It is shown that essentially the same procedure also can be used to synthesize the corresponding nitroindole-3-glyoxylates in one simple operation. The synthetic potential is discussed and a mechanism is proposed