Synlett 2005(1): 144-148  
DOI: 10.1055/s-2004-836023
LETTER
© Georg Thieme Verlag Stuttgart · New York

Low-Coordinated Diphosphinidenecyclobutene Ligands: A New Entry for Stille Cross-Coupling of Aryl Bromides

Anil S. Gajarea, Rader S. Jensena, Kozo Toyotaa, Masaaki Yoshifuji*a, Fumiyuki Ozawab
a Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan
b Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
Fax: +81(22)2176562; e-Mail: yoshifj@mail.tains.tohoku.ac.jp;
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Publikationsverlauf

Received 7 September 2004
Publikationsdatum:
08. November 2004 (online)

Abstract

A sterically protected diphosphinidenecyclobutene/palladium system has been used to mediate the catalytic cross-coupling of aryl bromides with organostannanes. An air- and moisture-stable diphosphinidenecyclobutene ligand proved the efficiency and generality of this class of ligand for cross-coupling reactions.