Catalytic Enantioselective Synthesis of Flavanones and Chromanones
摘要:
The enantioselective synthesis of flavanones and chromanones is described. Bifunctional thiourea catalysts promote an asymmetric oxo-conjugate addition to a beta-ketoester alkylidene in high yields with excellent enantioselectivity (80-94% ee) for aryl and alkyl substrates. Decarboxylation of the beta-ketoester proceeds smoothly in a one-pot procedure to afford the enantioenriched flavanones and chromanones.
Catalytic enantioselective synthesis of flavanones and chromanones
申请人:Scheidt Karl
公开号:US20090259055A1
公开(公告)日:2009-10-15
Various chromanone, flavanone and abyssinone compounds as can be prepared enantioselectively using a chiral thiourea catalyst.
可以使用手性硫脲催化剂对各种色酮、黄酮和阿比西农化合物进行对映选择性合成。
US7851640B2
申请人:——
公开号:US7851640B2
公开(公告)日:2010-12-14
Catalytic Enantioselective Synthesis of Flavanones and Chromanones
作者:Margaret M. Biddle、Michael Lin、Karl A. Scheidt
DOI:10.1021/ja070394v
日期:2007.4.1
The enantioselective synthesis of flavanones and chromanones is described. Bifunctional thiourea catalysts promote an asymmetric oxo-conjugate addition to a beta-ketoester alkylidene in high yields with excellent enantioselectivity (80-94% ee) for aryl and alkyl substrates. Decarboxylation of the beta-ketoester proceeds smoothly in a one-pot procedure to afford the enantioenriched flavanones and chromanones.