Iridium-Catalyzed [3 + 2] Annulation of 1,3-Dienes with <i>ortho</i>-Carbonylated Phenylboronic Acids. A Catalytic Process Involving Regioselective 1,2-Addition
Annulation of 1,3-dienes with 2-formylphenylboronic acid proceeded with high regio- and stereoselectivity in the presence of a hydroxoiridium catalyst to give high yields of indanol derivatives. Various 1,3-dienes bearing electron-withdrawing and -donating substituents were successfully used under the catalytic conditions.
Iridium-Catalyzed [3 + 2] Annulation of Cyclic <i>N</i>-Sulfonyl Ketimines with 1,3-Dienes via C–H Activation
作者:Takahiro Nishimura、Yusuke Ebe、Tamio Hayashi
DOI:10.1021/ja311968d
日期:2013.2.13
Ir-catalyzed [3 + 2] annulation of cyclic N-sulfonyl ketimines with 1,3-dienes, in which an aryliridium intermediate is formed via C-H activation, gives amino-indane derivatives in high yields with high regio- and diastereoselectivity.
Stereoselective synthesis of alkenylated malonic diamide using masked acyl cyanide
A highly stereoselective synthesis of an alkenylated malonic diamide starting from a gamma,delta-epoxy-alpha,beta-unsaturated carboxamide was accomplished using the masked acyl cyanide (MAC: the protected hydroxymalonitrile) via palladium-catalyzed regio- and stereoselective carbon-carbon bond formation. (C) 1999 Elsevier Science Ltd. All rights reserved.