The Alkoxy Substitution Reaction on α-Oxo Ketene Dithioacetals: A New Access to α-Oxo Ketene O,S-/O,O-Acetals
作者:Mang Wang、Xian-Xiu Xu、Shao-Guang Sun、Qun Liu
DOI:10.1081/scc-120027265
日期:2004.1
Abstract The substitution reaction of alkylthio group of α,α′-dioxo ketene dibenzylthioacetals by alkoxy group was performed successfully. This transformation provides a facile route to the useful α,α′-dioxo keteneO,S- and O,O-acetals.
A Clean, Facile and Practical Synthesis of α-OxoketeneS,S-Acetals in Water
作者:Yan Ouyang、Dewen Dong、Haifeng Yu、Yongjiu Liang、Qun Liu
DOI:10.1002/adsc.200505331
日期:2006.1
A clean, facile and practical synthesis of α-oxoketene S,S-acetals in water has been developed. Catalyzed by tetrabutylammonium bromide (TBAB) at room temperature in water, a range of β-dicarbonyl compounds have been converted to the corresponding α-oxoketene S,S-acetals in very high yields. The catalyst in the aqueous phase can be recycled after the separation of organic products.