Synthesis 2002(9): 1191-1194
DOI: 10.1055/s-2002-32542
PAPER
© Georg Thieme Verlag Stuttgart · New York

An Efficient Synthesis of Dibenzocycloocta-4a,6a,-diene-5,11-diyne and its Precursors

Sterling Chaffins, Michael Brettreich, Fred Wudl*
Exotic Materials Institute and Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA
Fax: +1(310)8250767; e-Mail: wudl@chem.ucla.edu;
Further Information

Publication History

Received 27 April 2002
Publication Date:
28 June 2002 (online)

Abstract

Two efficient syntheses of dibenzocyclooctadienediyne 1 were developed employing known reactions, which utilize commercially available reagents. Both methods are an improvement on known syntheses resulting in 41% and 43% overall yields. The latter method also offers an efficient synthesis of dibenzocyclooctatetraene 9, which is one of the key reagents now commercially unavailable.

3

Brettreich M.; Bendikov, M.; Chaffins, S.; Duong, H.; Perepichka, D. F.; Helgeson, R.; Wudl, F., in press.