Enhanced diastereo and enantioselectivity in the formation of acyldithiolane sulphoxides by the asymmetric oxidation of their enolsilyl ethers
作者:M.Teresa Barros、Alcino J. Leitão、Christopher D. Maycock
DOI:10.1016/s0040-4039(97)01101-5
日期:1997.7
The sulphoxidation of the enol ethers of some acyldithiolanes using the Sharpless epoxidation reagents followed by fluorolysis results in better overall stereoselectivity than direct oxidation of the acyldithiolane thus providing a highly stereoselective route to acyldithiolane sulphoxides. Fluorolysis under acid conditions of non terminal enol ethers results in complete racemisation of the product. (C) 1997 Published by Elsevier Science Ltd.
Synthesis of 2-Alkylidene-3,3-dialkyl-1,4-dithianes and Their Oxathiane Analogues by 1,2-Sulphur Migration
作者:Christopher D. Maycock、M. Teresa Barros、Lúcia S. Santos