Synthesis 2005(8): 1345-1349  
DOI: 10.1055/s-2005-861871
PAPER
© Georg Thieme Verlag Stuttgart · New York

Palladium-Catalyzed Cross-Coupling Reactions of 7-Bromo-2,3-diphenylpyrido[2,3-b]pyrazine

Lunxiang Yin, Jürgen Liebscher*
Institut für Chemie, Humboldt-Universität Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
Fax: +49(30)20937552; e-Mail: liebscher@chemie.hu-berlin.de;
Further Information

Publication History

Received 13 December 2004
Publication Date:
17 March 2005 (online)

Abstract

First examples of palladium-catalyzed cross-coupling reactions, such as Suzuki, Sonogashira, Heck and Buchwald-Hartwig reactions, are reported in the pyrido[2,3-b]pyrazine series. This methodology circumvents problems found in uncatalyzed nucleophilic substitution used so far to introduce substituents into the pyrido[2,3-b]pyrazine ring.