Electrophilic Activation of Lactams with Tf<sub>2</sub>O and Pyridine: Expedient Synthesis of (±)-Tetraponerine T4
作者:André B. Charette、Simon Mathieu、Jonathan Martel
DOI:10.1021/ol052069n
日期:2005.11.1
see text] The electrophilic activation of lactams with triflicanhydride in the presence of pyridine was investigated by NMR. It was found that 2-pyrrolidone led to the clean formation of the corresponding pyridinium imidate in 89% isolated yield. The subsequent nucleophilic addition of organometallic reagents led to 2-substituted dihydropyridines. A synthesis of (+/-)-tetraponerine T4 with three simple