Copper-Catalyzed Cross-Dehydrogenative Coupling (CDC) of Alkynes and Benzylic CH Bonds
作者:Camille A. Correia、Chao-Jun Li
DOI:10.1002/adsc.201000066
日期:——
The activation of benzylic CH bonds and subsequent coupling with terminal alkynes in the presence of 2,3‐dichloro‐5,6‐dicyanoquinone (DDQ) and a catalyticamount of copper(I) triflate is presented. Good to moderate yields of disubstituted alkynes are obtained for this cross‐dehydrogenative coupling (CDC) reaction between a variety of aromatic alkynes and diphenylmethane derivatives.
Sp–sp3 C–C bond formation via Fe(OTf)3/TfOH cocatalyzed coupling reaction of terminal alkynes with benzylic alcohols
作者:Shi-Kai Xiang、Li-He Zhang、Ning Jiao
DOI:10.1039/b911905a
日期:——
An Fe(OTf)(3)/TfOH cocatalyzed sp-sp(3) C-C bond formation through the coupling of benzylic alcohols with terminalalkynes in the absence of base has been developed. H(2)O is the sole by-product.
sulfonyl‐containing ammonium‐based Brønstedacidionic liquid was prepared and used as a liquid heterogeneous catalyst for organic reactions. The unique macroscopic phase heterogeneity of the IL in the reaction system not only ensures an excellent catalytic activity of the IL catalyst but also avoids the use of organic reaction solvents. The catalyst system is applicable for a wide range of reactions.
Catalytic CN Bond Alkynylation of<i>N</i>-Benzylic Sulfonamides with Terminal Alkynes
作者:Congrong Liu、Fulai Yang、Tingting Wang
DOI:10.1002/cjoc.201400194
日期:2014.5
of N‐benzylic sulfonamides with terminalalkynes for the synthesis of internal alkynes is reported. In the presence of 5 mol% of (Tf)2NH/Bi(OTf)3 (1:1), a broad range of N‐benzylic sulfonamides react smoothly with arylacetylenes to afford structurally diverse internal alkynes in moderate to excellent yields. We reasoned that vinyl cations could be formed by the regioselective attack of terminal alkynes
Indium(III) Catalyzed Direct sp<sup>3</sup>-sp C-C Bond Formation from Alcohols and Terminal Alkynes
作者:Guangming Nan、Jun Zhou
DOI:10.2174/1570178611310080004
日期:2013.8.1
C-C bond formationreaction via direct coupling of alcohols with terminalalkynes has been developed under mild conditions without any ligand, base or additive, in which both of aromatic and aliphatic alkynes and various alcohols such as benzylic, allylic and propargylicalcohols can be tolerated. This simple reaction system provides an attractive approach to a large number of internal alkynes in moderate