Facile preparation of α,β-unsaturated O,S-acetals and mixed acetals via 3-alkoxy-2-alkenylenesulfonium salts.
作者:Sunggak Kim、Joo Hyeon Park、Joo Moon Lee
DOI:10.1016/s0040-4039(00)73856-1
日期:1993.9
tetrahydrofuran at −78 °C, affords 3-alkoxy-2-alkenylenesulfonium salts which undergo facile nucleophilic substitution reactions with lithium thioalkoxides and trialkyltin alkoxides to yield α,β-unsaturated O,S-acetals and mixed acetals.
在TMSOTf存在下,于四氢呋喃中于-78°C下使α,β-不饱和缩醛与二甲硫反应,得到3-烷氧基-2-亚烯基s盐,并与硫代硫醇锂和三烷基锡醇盐进行容易的亲核取代反应,生成α,β -不饱和O,S-缩醛和混合缩醛。