Palladium‐Catalyzed Formal Hydroalkylation of Aryl‐Substituted Alkynes with Hydrazones
作者:Lin Yu、Leiyang Lv、Zihang Qiu、Zhangpei Chen、Ze Tan、Yu‐Feng Liang、Chao‐Jun Li
DOI:10.1002/anie.202005132
日期:2020.8.10
naturally abundant aldehydes, as both alkylation reagents and hydrogen donors. The hydroalkylation proceeds with high regio‐ and stereoselectivity to form (Z )‐alkenes, which are more difficult to generate compared to (E )‐alkenes. The reaction is compatible with a wide range of functional groups, including hydroxy, ester, ketone, nitrile, boronicester, amine, and halide groups. Furthermore, late‐stage modifications
Preparation of Organozinc Reagents via Catalyst Controlled Three-Component Coupling between Alkyne, Iodoarene, and Bis(iodozincio)methane
作者:Yukako Shimada、Zenichi Ikeda、Seijiro Matsubara
DOI:10.1021/acs.orglett.7b00917
日期:2017.7.7
Three-component coupling between an alkyne, iodoarene, and bis(iodozincio)methane yields allylic zinc with a tetrasubstituted alkene moiety in the presence of a nickel catalyst. The reaction proceeds via aryl nickelation of the alkyne and subsequent cross-coupling with bis(iodozincio)methane. Meanwhile, the same combination in the presence of a palladium and cobalt catalyst gives tetrasubstituted alkenylzinc