作者:A. hercouet、M. Le corre
DOI:10.1016/s0040-4020(01)92356-7
日期:1981.1
ω-Acyloxy n-butylidenetriphenylphosphoranes give α-acyl n-butylidenetriphenylphosphoranes by intermolecular condensation in t-BuOH, and 3,4-dihydro-(2H)-pyrans by intramolecular condensation in toluene. The α-acyl n-butylidene phosphoranes, which are the tautomeric form of α-acyloxaphosphanes, do not lead to cyclobutylketones but to dihydropyrans.
ω-酰氧基正丁基亚氨基三苯基苯基膦通过在t - BuOH中的分子间缩合生成α-酰基正丁基亚甲基三苯基苯基膦,并通过在甲苯中的分子内缩合生成3,4-二氢-(2H)-吡喃。作为α-酰基氧杂膦的互变异构形式的α-酰基正丁叉基膦烷不导致环丁基酮而是二氢吡喃。