作者:Hermann Stetter、Hans-Joachim Kogelnik
DOI:10.1055/s-1986-31501
日期:——
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.
2 δ³H-吡喃-2-酮的新合成方法 2H-吡喃-2-酮(2-吡喃酮)可通过两步法轻松高产制备,包括使用二甲基甲酰胺/草酰氯将 2-二乙氧基膦酰基烷酸与 1-羟甲基烷基酮烷基酯化(Stadler 方法),以及通过 Wittig-Horner-Emmons 反应将生成的 3-氧代-1-烯基 2-二乙氧基膦酰基烷酸酯环化。