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Catalyst-Controlled Regio- and Stereoselective Bromolactonization with Chiral Bifunctional Sulfides
Synlett ( IF 1.7 ) Pub Date : 2019-05-20 , DOI: 10.1055/s-0037-1610716
Ayano Tsuchihashi , Seiji Shirakawa 1
Affiliation  

Highly regioselective 5-exo bromolactonizations of stilbene-type carboxylic acids bearing electron-withdrawing substituents are achieved for the first time via the use of chiral bifunctional sulfide catalysts possessing a urea moiety. The chiral phthalide products are obtained in moderate to good enantioselectivities as the result of 5-exo cyclizations.

中文翻译:

手性双功能硫化物催化控制的区域选择性和立体选择性溴内酯化

通过使用具有尿素部分的手性双功能硫化物催化剂,首次实现了具有吸电子取代基的二苯乙烯型羧酸的高度区域选择性 5-外溴内酯化。作为 5-exo 环化的结果,手性苯酞产物以中等至良好的对映选择性获得。
更新日期:2019-05-20
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