Journal
JOURNAL OF SUPERCRITICAL FLUIDS
Volume 92, Issue -, Pages 70-74Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.supflu.2014.05.005
Keywords
Homocoupling; Terminal alkyne; Supercritical CO2; Copper catalyst; 1,3-Diyne
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Funding
- National Natural Science Foundation of China [21266019, 21062011, 21362019]
- Program for New Century Excellent Talents in University [NCET-08-858]
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An efficient method for CuCl-catalyzed homocoupling reaction of terminal alkynes in the synthesis of symmetric 1,3-diynes has been developed in supercritical CO2 (ScCO2) without organic solvent. Homocoupling of various terminal alkynes (solid or liquid) could afford the corresponding products in moderate to excellent yields. In addition, ScCO2 play the role of reactive solvent, and DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) acts as the key additive for homocoupling reactions of terminal alkynes, which enhanced the reaction rate and the solubility of copper(l) catalyst in ScCO2. (C) 2014 Elsevier B.V. All rights reserved.
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