Synthesis 2008(6): 921-924  
DOI: 10.1055/s-2008-1032195
PAPER
© Georg Thieme Verlag Stuttgart · New York

Amino-Claisen versus Oxy-Claisen Rearrangement: Regioselective Synthesis of Pyrrolocoumarin Derivatives

Krishna C. Majumdar*, Buddhadeb Chattopadhyay
Department of Chemistry, University of Kalyani, Kalyani 741 235, India
Fax: +91(33)25828282; e-Mail: kcm_ku@yahoo.co.in;
Further Information

Publication History

Received 3 December 2007
Publication Date:
28 February 2008 (online)

Abstract

Pyrrolocoumarin and its derivatives have been synthesized regioselectively in excellent yields by the amino-Claisen rearrangement of 3-N-propargylaminocoumarin and 3-N-(aryloxybut-2-ynyl)aminocoumarins.