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Synthesis 2008(6): 921-924
DOI: 10.1055/s-2008-1032195
DOI: 10.1055/s-2008-1032195
PAPER
© Georg Thieme Verlag Stuttgart · New York
Amino-Claisen versus Oxy-Claisen Rearrangement: Regioselective Synthesis of Pyrrolocoumarin Derivatives
Further Information
Received
3 December 2007
Publication Date:
28 February 2008 (online)
Publication History
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.
Key words
amino-Claisen rearrangement - oxy-Claisen rearrangement - [3,3]-sigmatropic rearrangement - 3-aminocoumarin - pyrrolocoumarin - 5-exo-trig
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