3,4-Dihydro-2-hydroxymethyl-2H,5H-pyrano[3,2-c][1]benzopyran-5-ones are the main products of the reaction of dimethylsulphoxonium methylide on Michael adducts of 4-hydroxycoumarins and α,β-unsaturated ketones. Minor quantities of 3,4-dihydro-2-hydroxymethyl-2H,5H-pyrano[2,3-b][1]benzopyran-5-ones are also sometimes obtained.

Oxygen Heterocycles by Sulphur Ylide Annulation: Synthesis of 3,4-Dihydro-2H,5H-pyrano[3,2-c][1]benzopyran-5-ones by Dimethylsulphoxonium Methylide

BRAVO, PIERFRANCESCO;RESNATI, GIUSEPPE;TICOZZI, CALIMERO;
1984

Abstract

3,4-Dihydro-2-hydroxymethyl-2H,5H-pyrano[3,2-c][1]benzopyran-5-ones are the main products of the reaction of dimethylsulphoxonium methylide on Michael adducts of 4-hydroxycoumarins and α,β-unsaturated ketones. Minor quantities of 3,4-dihydro-2-hydroxymethyl-2H,5H-pyrano[2,3-b][1]benzopyran-5-ones are also sometimes obtained.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/656759
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