Reactions of (2<i>S</i>)-1-Arenesulfonyl-2-alkanol Dianions with Aldehydes, Application to the Synthesis of Enantiomerically Pure (3<i>S</i>)-1-Alken-3-ols and (2<i>E</i>,4<i>S</i>)-4-Hydroxy-2-alkenenitriles
作者:Rikuhei Tanikaga、Ken Hosoya、Aritsune Kaji
DOI:10.1246/cl.1987.829
日期:1987.5.5
Enantiomerically pure (2S)-1-arenesulfonyl-2-alkanols (1) were prepared by yeast reduction of 1-arenesulfonyl-3-chloro-2-propanones, followed by epoxydation and alkylation. Reaction of dianions of 1 with aldehydes occurred at the Pro (R) position of C(1) to give 1,3-diols, which were converted to (3S)-1-alken-3-ols or (2S,4S)-4-hydroxy-2-alkenenitriles in 100% e.e.
对映体纯净的 (2S)-1-芳烷磺酰基-2-烷醇 (1) 是通过酵母还原 1-芳烷磺酰基-3-氯-2-丙酮制备的,随后进行了环氧化和烷基化反应。1 的二负离子与醛的反应发生在 C(1) 的 Pro (R)位,生成 1,3-二醇,这些二醇进一步转化为 (3S)-1-烯-3-醇或 (2S,4S)-4-羟基-2-烯腈,具有 100% 的对映体过量。