Intramolecular reaction of stabilised γ-acylphosphoniumylides derived from esters, thiolesters and amides withγ-lactone carbonyl groups resulted in the formation, by a Wittig-type cyclisation, of tetronic, thiotetronic and tetramic γ-lactones respectively.
衍生自酯,
硫酯和酰胺的稳定的γ-酰基yl与γ-内酯羰基的分子内反应导致通过Wittig型环化作用分别形成了远电子,
硫代电子和四氢γ-内酯。