A Convenient Synthesis of Indole-Substituted 2-Pyrrolidones and Their Cyclized Derivatives
作者:Michel Boisbrun、Laurent Jeannin、Loïc Toupet、Jean-Yves Laronze
DOI:10.1002/1099-0690(200009)2000:17<3051::aid-ejoc3051>3.0.co;2-3
日期:2000.9
Condensation between indole, Meldrum's acid, and benzyloxycarbonylacetaldehyde or aminoacetaldehyde derivatives yielded trimolecular adducts 7a-c. The latter were cyclized to indole-substituted 2-pyrrolidones 15a-b or 3-aminopyrrolid-2-ones 18a-b, depending on the starting material. Derivative 18a was transformed into pyrrolo[3',4' :5,6]pyrido[3,4-b]indol-3(2H)-ones 19a and 20a by a Pictet-Spengler condensation with benzaldehyde.