A Highly Active and General Catalyst for the Stille Coupling Reaction of Unreactive Aryl, Heteroaryl, and Vinyl Chlorides under Mild Conditions
作者:Dong-Hwan Lee、Yingjie Qian、Ji-Hoon Park、Jong-Suk Lee、Sang-Eun Shim、Myung-Jong Jin
DOI:10.1002/adsc.201300075
日期:2013.6.17
efficient and general catalyst in the Stillecouplingreaction of various aryl and heteroaryl chlorides with organostannanes. The results show that this catalytic system allows for the use of less reactive substrates such as deactivated or sterically hindered arylchlorides. A catalyst loading of 0.5 mol% was sufficient to achieve excellent performance under relatively mild reaction conditions. Furthermore
Rhodium-catalyzed C–H activation and conjugate addition under mild conditions
作者:Luo Yang、Camille A. Correia、Chao-Jun Li
DOI:10.1039/c1ob05993a
日期:——
An efficient rhodiumIII-catalyzed CâH activation and subsequent conjugate addition was achieved under mild conditions. The reaction utilized inert arenes to replace stoichiometric organometallic reagents and can tolerate various functional groups as well as air and water.
inexpensive and atom‐economical approach to CH bond functionalization, a cationic CoIII complex (see scheme) was used to generate nucleophilic organometallic species in situ without additional activating reagents. Under these conditions, aryl CH bonds underwent efficient addition to polar electrophiles, including α,β‐unsaturated N‐acyl pyrroles as β‐substituted ester and amide surrogates.
A manganese(<scp>i</scp>)tricarbonyl-catalyst for near room temperature alkene and alkyne hydroarylation
作者:Shweta Choudhary、Diego M. Cannas、Matthew Wheatley、Igor Larrosa
DOI:10.1039/d2sc04295a
日期:——
We have rationally designed a new Mn(I)-catalyst for hydroarylation reactions that displays much improved catalytic activity over the commonly used MnBr(CO)5. Our catalyst, MnBr(CO)3(MeCN)2, avoids the formation of the off-cycle manganacycle-(CO)4 species responsible for low catalyst activity, allowing near roomtemperaturehydroarylation of alkenes and alkynes with broad functional group tolerance including