Unexpected reversible nitrogen atom transfer in the synthesis of polysubstituted imides and 7-aza-hexahydroindolones via enaminonitrile γ-lactams
作者:Nabila Oukli、Sébastien Comesse、Nafa Chafi、Hassan Oulyadi、Adam Daïch
DOI:10.1016/j.tetlet.2009.01.072
日期:2009.4
An effective route to novel polysubstituted imides is described, which involves the reaction of enamino-nitrile gamma-lactams derived from N-alkylated alpha-bromoacetamides and malononitrile with acryloyl chloride derivatives. This preceded via a sequence 1,4-addition-intramolecular peptidic coupling and a gamma-lactam hydrolysis in a one 'pot-procedure'. These imides were regioselectively reduced into corresponding N-acyliminium precursors, Which Subsequently submitted to an intramolecular aza-cyclization in acidic medium to provide novel 7-hexahydro-aza-indoles. (C) 2009 Elsevier Ltd. All rights reserved.