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Synthesis 1986; 1986(2): 140-142
DOI: 10.1055/s-1986-31501
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Eine neue Synthese von 2 H-Pyran-1-onen

Hermann Stetter* , Hans-Joachim Kogelnik
  • *Institut für Organische Chemie der Rheinisch-Westfälischen Technischen Hochschule Aachen, Prof.-Pirlet-Straße 1, D-5100 Aachen, Bundesrepublik Deutschland
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Publication Date:
20 August 2002 (online)

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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.

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