Synthesis 2009(2): 311-317  
DOI: 10.1055/s-0028-1083295
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

A Short Route to the Synthesis of Pyrrolocoumarin and Pyrroloquinolone Derivatives by Sonogashira Cross-Coupling and Gold-Catalyzed Cycloisomerization of Acetylenic Amines

Krishna C. Majumdar*, Buddhadeb Chattopadhyay, Srikanta Samanta
Department of Chemistry, University of Kalyani, Kalyani 741235, WB, India
e-Mail: kcm_ku@yahoo.co.in;
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Publikationsverlauf

Received 11 September 2008
Publikationsdatum:
19. Dezember 2008 (online)

Abstract

The syntheses of pyrrolocoumarin and pyrroloquinolone derivatives have been achieved in excellent yields from the acetylenic amines by gold-catalyzed cycloisomerization in the absence of any silver salts or any other bases. The acetylenic amines were in turn obtained by Sonogashira coupling of the corresponding coumarin and quinolone derivatives.