We report an environmentally friendly, efficient method for transforming terminal acetylenes into 1,3-diynes based on catalytic amounts of a Cu(II) salt and base under solvent-free conditions. The developed process conforms to the principles of ‘green’ chemistry and addresses the shortage of such methods for the synthesis of 1,3-diynes. The reaction is quite general and results in good yields. Interestingly
Recyclable Cu/C<sub>3</sub>N<sub>4</sub> composite catalysed homo- and cross-coupling of terminal alkynes under mild conditions
作者:Hang Xu、Keying Wu、Jing Tian、Li Zhu、Xiaoquan Yao
DOI:10.1039/c7gc03120c
日期:——
for the homo- & cross-coupling of terminal alkynes. Excellent functional group tolerance and good yields were observed with oxygen as an oxidant in an isopropanol solution (or as additive) under ambient conditions. Furthermore, the composite catalyst shows good recyclability and can be recovered simply and reused several times without significant loss in its catalytic activities.
制备了Cu / C 3 N 4复合材料,并将其用作高效和环保的末端炔烃均相和交叉偶联催化剂。在环境条件下,使用氧气作为异丙醇溶液(或作为添加剂)的氧化剂,观察到出色的官能团耐受性和良好的产率。此外,该复合催化剂显示出良好的可循环性,并且可以简单地回收并重复使用几次而不会显着降低其催化活性。
Iron/copper promoted oxidative homo-coupling reaction of terminal alkynes using air as the oxidant
An inexpensive catalytic system, which used a readily available Fe(acac)(3) and trace quantity of Cu (acac)(2) as the co-catalyst and air as the oxidant for the homo-coupling of terminal alkynes, has been developed. The catalytic system could also apply to the cross-coupling reaction of two different terminal alkynes. (C) 2010 Elsevier Ltd. All rights reserved.