Organocatalysis as a Safe Practical Method for the Stereospecific Dibromination of Unsaturated Compounds
作者:Gloria Hernández-Torres、Bin Tan、Carlos F. Barbas
DOI:10.1021/ol300456x
日期:2012.4.6
Organocatalytic stereospecific dibromination of a wide variety of functionalized alkenes was achieved using a stable, inexpensive halogen source, 1,3-dibromo 5,5-dimethylhydantoin, and a simple thiourea catalyst at room temperature. The presence of a tertiary amine enhanced the rate of the dibromination reaction, and yields were good in various solvents, including aqueous solvents. The procedure was
在室温下,使用稳定,廉价的卤素源,1,3-二溴5,5,5-二甲基乙内酰脲和简单的硫脲催化剂可实现多种官能化烯烃的有机催化立体有择二溴化反应。叔胺的存在提高了二溴化反应的速率,并且在包括水性溶剂在内的各种溶剂中产率都很高。通过使用1,3-二氯乙内酰脲衍生物,该方法扩展到炔烃和芳环以及二氯化反应。