Highly efficient diastereoselective Exo Diels-Alder reactions of homochiral 2-(N-acylamino)-1-thia-1,3-dienes: A powerful entry into optically pure thiopyrans
作者:Andrew S. Bell、Colin W.G. Fishwick、Jessica E. Reed
DOI:10.1016/0040-4039(95)02089-6
日期:1996.1
4-Phenyl-2-N-(R-(−)-α-(2-naphthyl)ethylamino)-1-thia-1,3-dienes when activated by acetyl chloride, undergo extremely efficientdiastereoselectiveexoDiels-Alder cycloadditions giving access to thiopyrans of high optical purity.
Generation and cycloadditions of 2-(N-acylamino)-1-thia-1,3-dienes part III: Control of diastereoselectivity using homochiral auxiliaries
作者:Andrew S. Bell、Colin W.G. Fishwick、Jessica E. Reed
DOI:10.1016/s0040-4020(98)00067-2
日期:1998.3
Activated 2-(N-acylamino)-1-thia-1,3-dienes undergo efficientdiastereoselectiveDiels-Alder cycloadditions giving access to thiopyrans of high optical purity. By variation of the position and nature of the chiral auxiliaries we have been able to induce a high degree of facial selectivity in endo selective cycloadditions and induce total facial control in exo selective cycloadditions.