Synthesis 2006(4): 666-674  
DOI: 10.1055/s-2006-926299
PAPER
© Georg Thieme Verlag Stuttgart · New York

An Efficient CuI-Promoted Synthesis of Tri- and Tetrasubstituted Alkenes Using Organozinc Species

Song Xue*, Lin He, Yong-Kang Liu, Kai-Zhen Han, Qing-Xiang Guo
Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. of China
Fax: +86(551)3606689; e-Mail: xuesong@ustc.edu.cn;
Further Information

Publication History

Received 27 July 2005
Publication Date:
11 January 2006 (online)

Abstract

An efficient method for the synthesis of multifunctionalized alkenes has been developed. In the presence of 5 mol% CuI as catalyst, organozinc species CF3COOZnEt, CF3COOZnMe and CF3COOZnPh reacted with α,β-acetylenic ketones and aldehydes in one pot providing trisubstituted alkenes in high yields with stereoselectivity. The reaction with β-substituted-α,β-acetylenic ketones gave tetrasubstituted alkenes in good yields with Z-isomers as the major products.