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 efficient diastereoselective Diels-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.
活化的2-(N-酰基氨基)-1-硫-1,3-二烯经过有效的非对映选择性Diels-Alder环加成反应,可获得高光学纯度的硫吡喃。由位置的变化和性质的手性助剂的,我们已经能够诱导高度的面部的选择性内切选择性环加成和诱导总面部控制在外型选择性环加成。