Ir-Catalyzed Regio- and Stereoselective Hydrosilylation of Internal Thioalkynes: A Combined Experimental and Computational Study
作者:Li-Juan Song、Shengtao Ding、Yong Wang、Xinhao Zhang、Yun-Dong Wu、Jianwei Sun
DOI:10.1021/acs.joc.6b00854
日期:2016.8.5
However, the exploitation for selectivehydrosilylation of unsymmetrical internal alkynes has been limitedly known. Described here is a new example of this type. Specifically, [(cod)IrCl]2 catalyzes the efficient and mild hydrosilylation of thioalkynes by various silanes with excellent regio- and stereoselectivity. DFT studies suggested a new mechanism involving Ir(I) hydride as the key intermediate.
Stereoselective Synthesis of Fully-Substituted Acrylonitriles via Formal Acylcyanation of Electron-Rich Alkynes
作者:Bing Liu、Yong Wang、Ying Chen、Qian Wu、Jing Zhao、Jianwei Sun
DOI:10.1021/acs.orglett.8b01180
日期:2018.6.15
A Sc(OTf)3-catalyzed formal acylcyanation of electron-rich alkynes for the efficient synthesis of fully-substituted acrylonitriles is described. By means of alkyne carbonyl metathesis, the reaction features mild conditions, high regio- and stereoselectivity, and a broad scope. The strong preference of the nitrile group for inward rotation in the torquoselective ring opening of the oxetane intermediate