作者:Xue-Liang Wu、Guan-Wu Wang
DOI:10.1016/j.tet.2009.08.069
日期:2009.10
The PhI(OAc)2-catalyzed aminobromination of electron-deficient olefins has been achieved in pure water with TsNH2 and NBS as nitrogen and bromine sources, respectively. With a catalytic amount of PhI(OAc)2, various olefins including α,β-unsaturated ketones, cinnamates, and cinnamides could be aminobrominated efficiently, giving the vicinal bromoamines in good yields and high regio- and diastereoselectivities
在纯水中分别用TsNH 2和NBS作为氮源和溴源,已实现了PhI(OAc)2催化的缺电子烯烃的氨基溴化反应。用催化量的PhI(OAc)2,可以有效地将各种烯烃(包括α,β-不饱和酮,肉桂酸酯和肉桂酰胺)进行氨基溴化反应,从而使邻位溴胺的收率高,区域和非对映选择性高。以水为溶剂对于催化实现这种氨基溴化反应至关重要。在目前的水性条件下,苯乙烯的氨基溴化的区域选择性也大大提高了。