Synthesis of (−)-(<i>R</i>)-Pyrrolam A and Studies on Its Stability: A Caveat on Computational Methods
作者:Rhett T. Watson、Vinayak K. Gore、Kishan R. Chandupatla、R. Karl Dieter、James P. Snyder
DOI:10.1021/jo049460r
日期:2004.9.1
The asymmetric synthesis of (−)-(R)-pyrrolam A was achieved in three operations from N-Boc pyrrolidine via an α-(N-carbamoyl)alkylcuprate vinylation reaction followed by N-Boc deprotection and cyclization. One-pot deprotection−cyclization procedures led to mixtures of pyrrolam A and its double bond isomers. These isomerization events could be circumvented by use of a two-step procedure. To guide aspects