A Michael Route to Acetals and Thioacetals: Preparation of Acetals (Thioacetals) of 2-Sulfonylacetaldehyde from Alkynyl and Other Unsaturated Aryl Sulfones
摘要:
本文介绍了将芳基磺酰基炔 1、(Z)- 和 (E)-1,2- 双(苯磺酰基)乙烯 (2) 以及 (E)-1-chloro-2-phenylsulfonylethylene (3) 直接转化为乙酰砜的乙醛或硫代乙醛的简单方案。它涉及醇或硫醇与 1-3 在室温下 2-12 小时的 NaH 催化反应。重点是对映纯 C 2 对称二元醇,以生产用于不对称合成的手性构件。
A general, selective synthesis of ω-hydroxyethenyl ethers
作者:E Cabianca、F Chéry、P Rollin、A Tatibouët、O De Lucchi
DOI:10.1016/s0040-4039(01)02195-5
日期:2002.1
A general selective synthesis of β-, γ- and δ-hydroxyethenyl ethers, a class of compounds containing two mutually reactive functionalities positioned at an interacting distance, is based on the reaction of diols with 1,2-bis-(phenylsulfonyl)ethylene (BPSE) followed by reductive elimination of the resulting β-phenylsulfonyl acetals with sodium amalgam.