Ytterbium triflate hydrate catalyzed Michael addition and cyclocondensation of α,β-unsaturated ketones with active methylene compounds  

作　　者：Zhi Wei Chen Yan Li Wang Ren Er Chen Wei Ke Su 

机构地区：[1]Key Laboratory of Pharmaceutical Engineering of Ministry of Education, Zhejiang University of Technology, PR China [2]College of Pharmaceutical Sciences, Zhejiang University of Technology, Itangzhou 310014, PR China

出　　处：《Chinese Chemical Letters》2008年第9期1024-1026,共3页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China (No.20676123) for financial support.

摘　　要：Catalyzed by ytterbium（III） triflate hydrate [Yb（OTf）3.xH20], the Michael addition and cyclocondensation of α,β-unsaturated ketones with active methylene compounds to afford the 1,4-adducts and benzo[b]pyran derivatives, respectively were studied.Catalyzed by ytterbium（III） triflate hydrate [Yb（OTf）3.xH20], the Michael addition and cyclocondensation of α,β-unsaturated ketones with active methylene compounds to afford the 1,4-adducts and benzo[b]pyran derivatives, respectively were studied.

关 键 词：Ytterbium（Ⅲ） triflate hydrate α β-Unsaturated ketones Active methylene compounds Benzo[b]pyran derivatives 

分 类 号：O621.25[理学—有机化学]