Desymmetrization of Cyclohexadienones via Brønsted Acid-Catalyzed Enantioselective Oxo-Michael Reaction
摘要:
Desymmetrization of cyclohexadienones via enantioselective oxo-Michael reaction catalyzed by chiral phosphoric acid to afford highly enantioenriched 1,4-dioxane and tetrahydrofuran derivatives in excellent yields has been realized. The newly established methodology allows the facile enantioselective synthesis of cleroindicins C, D, and F.
Desymmetrization of Cyclohexadienones via Brønsted Acid-Catalyzed Enantioselective Oxo-Michael Reaction
作者:Qing Gu、Zi-Qiang Rong、Chao Zheng、Shu-Li You
DOI:10.1021/ja100207s
日期:2010.3.31
Desymmetrization of cyclohexadienones via enantioselective oxo-Michael reaction catalyzed by chiral phosphoric acid to afford highly enantioenriched 1,4-dioxane and tetrahydrofuran derivatives in excellent yields has been realized. The newly established methodology allows the facile enantioselective synthesis of cleroindicins C, D, and F.
Asymmetric Intramolecular Oxa-Michael Reactions of Cyclohexadienones Catalyzed by a Primary Amine Salt
作者:Wenbin Wu、Xin Li、Huicai Huang、Xiaoqian Yuan、Junzhu Lu、Kailong Zhu、Jinxing Ye
DOI:10.1002/anie.201206977
日期:2013.2.4
Michael brings the rings: An asymmetricintramolecular oxa‐Michael reaction involving iminium activation has been developed. This reaction provides enantioenriched 1,4‐dioxane derivatives with up to 99 % yield and 98 % ee. The method allows for concise and stereoselective access to stereodiverse, complex tetracyclic compounds containing a bicyclo[2.2.2]octan‐2‐one backbone with multiple chiral centers