which the sulfoxide asymmetry is matched with the inducing effect of the auxiliary give good diastereoselection in SPAC reactions affording γ-hydroxy-α,β-unsaturatod alcohols of high optical purity. Asymmetry at the sulfoxide has a greater effect than the auxiliaries on the stereochemical outcome of these reactions.
从单手性醇制备具有确定的立体
化学的4-
氯苯基亚磺酰基
乙酸酯:化合物(2)来自(+)-薄荷醇;(-)-
8-苯基薄荷醇中的3和4;(+)-反式-
2-苯基环己醇的5和6 ; (7)和(9)来自(-)-10-二环己基
氨磺酰基-D-异
冰片醇。亚砜不对称性与助剂的诱导作用相匹配的试剂在S
PAC反应中具有良好的非对映选择性,从而提供了具有高光学纯度的γ-羟基-α,β-不饱和醇。亚砜的不对称性比助剂对这些反应的立体
化学结果的影响更大。