Nickel-catalyzed cross-coupling reaction of acetylenic sulfones with alkynyl Grignard reagents: a facile method for the preparation of unsymmetrical 1,3-diynes
作者:Kuang Fang、Meihua Xie、Zhannan Zhang、Peng Ning、Guanying Shu
DOI:10.1016/j.tetlet.2013.05.049
日期:2013.7
The cross-coupling reaction of acetylenic sulfones with acetylenic Grignardreagents was realized by using Ni(acac)2 as catalyst to afford unsymmetrical 1,3-diynes under mild conditions without homocoupling byproducts. By using this method, 1,4-diaryl-1,3-diynes could be obtained in moderate to good yields (59–83%), whereas, the yields for alkyl substituted 1,3-diynes are lower (30–54%).
First Catalytic Reductive Coupling of 1,3-Diynes to Carbonyl Partners: A New Regio- and Enantioselective C−C Bond Forming Hydrogenation
作者:Ryan R. Huddleston、Hye-Young Jang、Michael J. Krische
DOI:10.1021/ja030415v
日期:2003.9.1
Upon exposure of diynes and glyoxals to cationic Rh(I) catalysts under 1 atm of hydrogengas, regioselective condensation occurs to afford highly unsaturated enyne products without over-reduction. In the presence of chiral phosphine ligands, reductive coupling products are obtained in high enantiomeric excess at ambient temperature and pressure. The present studies are among the first examples of the
approaches to targets with high complexity are directed toward using small, modular building blocks similar to a “Lego” construction using iterative chemistry and automated synthesis. Organoboron compounds are currently in the spotlight for achieving these goals. Here, we report an operationally simple, regioselective protoboration of 1,3-diynes using a mixed diboron reagent and Cu(I)/phosphine catalyst
In the present work, we demonstrate a regioselective [2 + 2 + 2] cyclotrimerization of 1,3-diynes catalyzed by Ni0 to provide hexasubstituted benzenes (HSBs). HSBs have significant applications as functional materials and pharmaceuticals. The present protocol exhibited remarkable versatility, transforming 1,3-diynes with diverse alkyl, aryl, and heterocyclic groups to the corresponding HSBs. With the
Multicomponent Synthesis of 3(2H)‐Furanones Initiated by Copper(II)‐Catalyzed Alkyne‐Carbonyl Cross Metathesis
作者:Zhenjie Su、Shaozhong Wang
DOI:10.1002/chem.202401999
日期:2024.8.27
The cooperative Lewis- and Brønsted acid catalysis enables a multicomponent synthesis of 3(2H)-furanones from 1,3-diynes, alkyl glyoxylates and water, in which a highly chemo-, regio- and stereoselective alkyne-carbonyl cross metathesis of 1,3-diynes has been developed and suggested as the initial step of the annulation.