作者:Kenichi Murai、Tomoyo Matsushita、Akira Nakamura、Shunsuke Fukushima、Masato Shimura、Hiromichi Fujioka
DOI:10.1002/anie.201005409
日期:2010.11.22
A productive alliance: In an enantioselective organocatalytic bromolactonization of 5‐substituted hex‐5‐enoic acids (see scheme), it appears that the formation of an ion pair through interaction of the trisimidazoline catalyst 1 with the substrate both creates a chiral environment and promotes the cyclization by activating the carboxylic acid. DBDMH=1,3‐dibromo‐5,5‐dimethylhydantoin.
一个有效的联盟:在5个取代的6-5个烯酸的对映选择性有机催化溴化内酰胺中(参见方案),似乎通过三咪唑啉催化剂1与底物的相互作用形成离子对,既创造了手性环境,又促进了通过活化羧酸环化。DBDMH = 1,3-二溴-5,5-二甲基乙内酰脲。