Metal‐free photochemical carbene‐transfer reactions of tosylhydrazones were developed under blue light irradiation at room temperature. This reaction constructs C−X (X=C, N, O, S) bonds and cyclopropanes from readily available and stable starting materials.
Hemin-Catalyzed, Cyclodextrin-Assisted Insertion of Carbenoids into NH Bonds
作者:Xiaofei Xu、Chang Li、Zhihao Tao、Yuanjiang Pan
DOI:10.1002/adsc.201500418
日期:2015.10.12
An aqueous hemin-catalyzed, cyclodextrin-assisted NH insertion reaction of α-diazo ester into aromatic amines is described here. This aqueous catalytic system showed good compatibility with various arylamines, with yields up to 96%. A size-controlled reaction phenomenon by different cyclodextrins (CDs) was also observed when ethyl diazoacetate (EDA) was used. The reaction mechanism was also preliminarily
The utility of gold catalysis for carbene X-H bond insertion chemistry is described for the first time, taking advantage of the unique reactivity of sulfoxonium ylides as metal carbene precursors. (C) 2010 Elsevier Ltd. All rights reserved.