Eine neue Synthese von 2H-Pyran-1-onen
- 1 January 1986
- journal article
- research article
- Published by Georg Thieme Verlag KG in Synthesis
- Vol. 1986 (02) , 140-142
- https://doi.org/10.1055/s-1986-31501
Abstract
A New Synthesis of 2γH-Pyran-2-ones 2H-Pyran-2-ones (2-pyrones) are easily prepared in high yield by a two-step sequence consisting of esterification of 2-diethoxyphosphinylalkanoic acids with alkyl 1-hydroxymethylenealkyl ketones using dimethylformamide/oxalyl chloride (Method of Stadler) and cyclization of the resultant 3-oxo-1-alkenyl 2-diethoxyphosphinylalkanoates by the Wittig-Horner-Emmons reaction.Keywords
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