The addition of zinc(II)bromide reverses the diastereoselectivity of the diisobutyl-aluminium hydride (DIBAL-H) reduction of benzylidene sulphinamide R(S)R-(−)-4. The same reversal is not observed in the reactions of analogues lacking an amide side chain.
溴化锌(II)的添加逆转了亚苄基亚磺酰胺R (S) R-(-)- 4的
二异丁基氢化铝(D
IBAL-H)还原的非对映选择性。在缺少酰胺侧链的类似物的反应中未观察到相同的逆转。