期刊
TETRAHEDRON LETTERS
卷 53, 期 41, 页码 5559-5561出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2012.08.050
关键词
Base; Homocoupling; Terminal alkyne; 1,3-Diyne; Copper
资金
- National Natural Science Foundation of China [21142012, 21002061, 20902057]
- Key Laboratory of Synthetic Chemistry of Natural Substances, Chinese Academy of Sciences
- Leading Academic Discipline Project of Shanghai Municipal Education Commission [J50101]
- Graduate Innovation Fund of Shanghai University
Copper-catalyzed, solvent-free oxidative homocoupling of terminal alkynes can be performed to 1,3-diynes in good to excellent yields in the absence of any additives, using air as environmentally friendly oxidant and the occurrence of water as an exclusive byproduct in the whole process. It is shown that AcO- of copper (II) acetate catalyst may take the role of base and found that the homocoupling cannot occur using weakly basic copper salt catalysts such as CuBr, CuCl, or Cul. Thus, the bases are absolutely necessary in the process of the homocoupling of terminal alkynes. (C) 2012 Elsevier Ltd. All rights reserved.
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