87841-03-0Relevant academic research and scientific papers
Butenolide Syntheses, II. Simple Synthesis of 4-Substituted 2,2-Diethoxy-5-alkylidene-2,5-dihydrofurans, 3-Substituted 4-Alkylidene-2-butene-4-olides or 5,6-Dihydro-2-pyrones
Saalfrank, Rolf W.,Schierling, Peter,Hafner, Wieland
, p. 3482 - 3486 (2007/10/02)
Reaction of the (2,2-diethoxyvinylidene)triphenylphosphorane (5) with enolizing 1,2-diketones 3 via the (2,2-diethoxyvinyl)triphenylphosphonium enolates 6 yields the orthoesterphosphoranes 7, which in an intermolecular Wittig reaction spontaneously give t
