Rh2(S-biTISP)2-Catalyzed Asymmetric Functionalization of Indoles and Pyrroles with Vinylcarbenoids
摘要:
Asymmetric functionalization of N-heterocycles by vinylcarbenoids in the presence of catalytic amounts of Rh-2(S-biTISP)(2) has been successfully developed. This bridged dirhodium catalyst not only selectively enforces the reaction to occur at the vinylogous position of the carbenoid but also affords high levels of asymmetric induction.
Rhodium Carbenoid Approach for Introduction of 4-Substituted (<i>Z</i>)-Pent-2-enoates into Sterically Encumbered Pyrroles and Indoles
作者:Yajing Lian、Huw M. L. Davies
DOI:10.1021/ol9028385
日期:2010.3.5
An unusual rhodium carbenoid approach for introduction of 4-substituted (Z)-pent-2-enoates into sterically encumbered pyrroles and indoles is described. These studies show that (Z)-vinylcarbenoids have a greater tendency than (E)-vinylcarbenoids to react at the vinylogous position of the carbenoid rather than at the carbenoid center.
描述了一种将 4-取代的 ( Z )-pent-2-enoates 引入空间阻碍的吡咯和吲哚中的不寻常的铑类胡萝卜素方法。这些研究表明,( Z )-乙烯基类胡萝卜素比( E )-乙烯基类胡萝卜素更倾向于在类胡萝卜素的插烯位置而不是在类胡萝卜素中心发生反应。
Rh<sub>2</sub>(<i>S</i>-biTISP)<sub>2</sub>-Catalyzed Asymmetric Functionalization of Indoles and Pyrroles with Vinylcarbenoids
作者:Yajing Lian、Huw M. L. Davies
DOI:10.1021/ol300632p
日期:2012.4.6
Asymmetric functionalization of N-heterocycles by vinylcarbenoids in the presence of catalytic amounts of Rh-2(S-biTISP)(2) has been successfully developed. This bridged dirhodium catalyst not only selectively enforces the reaction to occur at the vinylogous position of the carbenoid but also affords high levels of asymmetric induction.