Synthesis 2010(20): 3461-3466  
DOI: 10.1055/s-0030-1258199
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Efficient Copper(II) Acetate Catalyzed Homo- and Heterocoupling of Terminal Alkynes at Ambient Conditions

Kaluvu Balaraman, Venkitasamy Kesavan*
Department of Biotechnology, Indian Institute of Technology Madras, Chennai 600036, India
Fax: +91(44)22574102; e-Mail: vkesavan@iitm.ac.in;
Further Information

Publication History

Received 14 June 2010
Publication Date:
05 August 2010 (online)

Abstract

Symmetrical 1,3-diynes were obtained in quantitative yields using the copper(II) acetate catalyzed homocoupling of terminal alkynes in the presence of a stoichiometric amount of piperidine at 25 ˚C under aerobic conditions. We also accomplished facile syntheses of unsymmetric 1,3-diynes by heterocoupling terminal alkynes in very good yields under the reported reaction conditions.