(+/-)-iso-Amarine is a potent organocatalyst at 1 mol% loading for both the bromoacetoxylation of alkenes with added acetic acid and bromolactonisation of unsaturated carboxylic acids with stoichiometric NBS as the electrophilic bromine source. A simple bromoamidine with an N-Br bond has been characterised crystallographically for the first time. Asymmetric induction in the bromination reactions with enantiopure amidines was zero. (c) 2007 Elsevier Ltd. All rights reserved.
“(+/-)-iso-Amine是一种在1 mol%负载下对烯烃的
溴代乙酰氧基化反应(使用
乙酸作为添加剂)以及不饱和
羧酸的
溴酯化反应(使用当量的
NBS作为亲电
溴源)的高效有机催化剂。首次通过晶体学方法表征了一种简单的具有N-Br键的
溴代脒结构。使用对映体纯的脒类催化剂的
溴化反应中,不对称诱导效应为零。©2007 Elsevier Ltd. 保留所有权利。”