4.5 Article

A convenient and improved Baylis-Hillman synthesis of 3-substututed 2H-1-benzopyran-2-ones

Journal

SYNTHESIS-STUTTGART
Volume -, Issue 18, Pages 2701-2706

Publisher

GEORG THIEME VERLAG KG
DOI: 10.1055/s-2002-35984

Keywords

heterocycles; synthesis; coumarins; 2H-1-benzopyran-2-ones; Baylis-Hillman reaction

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Halogen acid-catalysed deprotection and cyclisation of Baylis-Hillman products obtained using O-benzylated salicylaldehyde precursors has been shown to afford 3-(halomethyl)coumarins (3-halomethyl-2H-1-benzopyran-2-ones) chemoselectively and in good yield.

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