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The reaction of oxovinylidenetriphenylphosphorane or its dimer with aromatic carboxylic acid chlorides leads not to cyclobutanedione derivatives but to pyrone compounds, which can be converted to open chained bisphosphoranes with sodium methoxide (equation 104). If the acid chlorides carry an... [Pg.191]

See other pages where 2-Pyrones carboxylic acid chloride is mentioned: [Pg.468] [Pg.301] [Pg.382] [Pg.476] [Pg.382] [Pg.640] [Pg.65]

See also in sourсe #XX -- [ Pg.24 , Pg.45 ]