Journal
TETRAHEDRON LETTERS
Volume 44, Issue 22, Pages 4199-4201Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(03)00902-X
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A novel generally applicable synthesis of coumarins from phenolic substrates utilizing ring-closing metathesis is described. This sequence involves O-allylation of phenols followed by ortho-Claisen rearrangement, subsequent base-induced isomerization affording 2-(1-propenyl)phenols, acylation with acryloyl chloride, and finally ring-closing metathesis (RCM) with Grubbs' second generation catalyst. (C) 2003 Elsevier Science Ltd. All rights reserved.
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