<i>N</i>,<i>N</i>-Acetals as <i>N</i>-Acyliminium Ion Precursors: Synthesis and Absolute Stereochemistry of Epiquinamide
作者:Marloes A. Wijdeven、Roel Wijtmans、Rutger J. F. van den Berg、Wim Noorduin、Hans E. Schoemaker、Theo Sonke、Floris L. van Delft、Richard H. Blaauw、Richard W. Fitch、Thomas F. Spande、John W. Daly、Floris P. J. T. Rutjes
DOI:10.1021/ol801490m
日期:2008.9.18
A stereoselectivesynthesis of (+)-epiquinamide is presented in combination with determination of the absolute configuration of the natural product. Key steps in the sequence involved chemoenzymatic formation of an enantiomerically pure cyanohydrin, reductive cyclization to the corresponding cyclic N,N-acetal, and subsequent conversion into a suitable N-acyliminium ion precursor to enable construction