synthetic equivalent of α-hydroxy and α-chloro benzyl carbanions by means of a two-step sequence involving (1) highly stereoselective α-C-alkylation with alkyl bromides, and (2) displacement of the sulfinyl group by an OH or a Cl under Pummerer or chloro-Pummerer conditions, respectively. The sulfinyl auxiliary can be effectively regenerated and recycled.
邻-[[(N-甲基)
氨基甲酰基]苯基
苄基亚砜通过两步序列被用作α-羟基和α-
氯苄基碳负离子的合成等价物,该步骤涉及(1)具有烷基的高度立体选择性的α- C-烷基化(2)在Pummerer或
氯-Pummerer条件下分别用OH或Cl取代亚磺酰基。亚磺酰基助剂可以有效地再生和再循环。