A New, Simple, and High-Yielding Synthesis of 2,9-Dihydro-1H-pyrido[3,4-b]indol-1-ones
摘要:
A new, simple, and high-yielding method was developed to prepare 2,9-dihydro-1H-pyrido[3,4-b]indol-1-ones by selective cyclization of the appropriate N-(2,2-dimethoxyethyl)-1H-indole-2-carboxamide in polyphosphoric acid at 110 degrees C for 30 minutes. The reaction yield was strongly dependent on the acid used. The method was less affected by the presence of electron-donating and -withdrawing substituents at 5-position of the indole nucleus.
Blaikie; Perkin, Journal of the Chemical Society, 1924, vol. 125, p. 313
作者:Blaikie、Perkin
DOI:——
日期:——
A New, Simple, and High-Yielding Synthesis of 2,9-Dihydro-1H-pyrido[3,4-b]indol-1-ones
作者:Giuseppe La Regina、Valeria Famiglini、Sara Passacantilli、Sveva Pelliccia、Pasqualina Punzi、Romano Silvestri
DOI:10.1055/s-0033-1339155
日期:——
A new, simple, and high-yielding method was developed to prepare 2,9-dihydro-1H-pyrido[3,4-b]indol-1-ones by selective cyclization of the appropriate N-(2,2-dimethoxyethyl)-1H-indole-2-carboxamide in polyphosphoric acid at 110 degrees C for 30 minutes. The reaction yield was strongly dependent on the acid used. The method was less affected by the presence of electron-donating and -withdrawing substituents at 5-position of the indole nucleus.