Synthesis 2003(7): 1100-1104
DOI: 10.1055/s-2003-39175
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

InCl3-Catalyzed [3 + 2] Cycloaddition Reactions: A Facile Synthesis of trans-Dihydrobenzofurans and Substituted Cyclobutane Derivatives

J. S. Yadav*, B. V. S. Reddy, G. Kondaji
Division of Organic Chemistry, Indian Institute of Chemical Technology, Hyderabad-500 007, India
Fax: +91(40)27160512; e-Mail: yadav@iict.ap.nic.in;
Further Information

Publication History

Received 30 January 2003
Publication Date:
09 May 2003 (online)

Abstract

1,4-Benzoquinones undergo smoothly [3 + 2] cycloaddition reactions with electron rich alkenes in the presence of 10 mol% indium trichloride or 5 mol% iodine under mild conditions to afford the corresponding 2,3-dihydrobenzofurans in excellent yields with trans-selectivity. Similarly, methyl vinyl ketone reacts with electron rich olefins to produce substituited trans-cyclobutane derivatives.