Stereocontrolled synthesis of novel enantiomerically pure sulfides and selenides from (+)-camphor and (+)-camphor-10-sulfonyl chloride
作者:David J. Procter、Nicolas J. Archer、Robert A. Needham、David Bell、Allan P. Marchington、Christopher M. Rayner
DOI:10.1016/s0040-4020(99)00507-4
日期:1999.7
Synthetic approaches to novelenantiomericallypure sulfides and selenides derived from (+)-camphor and (+)-camphor-10-sulfonate esters are described. Lewis acid mediated hemiacetal formation between a camphor-derived ketone and a thiol or selenol, and subsequent in situ reduction using triethylsilane selectively gives the exo-sulfide or -selenide in moderate overall yields. The initial sulfonate ester