First isolation and characterization of 1,2-oxaphosphetanes with three phenyl groups at the phosphorus atom in typical Wittig reaction using cyclopropylidenetriphenylphosphorane
作者:Masashi Hamaguchi、Yuji Iyama、Eiko Mochizuki、Takumi Oshima
DOI:10.1016/j.tetlet.2005.10.086
日期:2005.12
stable crystals in the typical Wittig reaction of cyclopropylidenetriphenylphosphorane with activated carbonyl compounds. X-ray analysis of the oxaphosphetane showed that the phosphorus atom is at the center of a slightly distorted trigonal bipyramidal structure. Thermal decomposition of these oxaphosphetanes was carried out to give the starting carbonyl compounds and Wittig reaction products, olefins.
首次成功地分离出带有三个直接键合到磷原子上的三个苯基的1,2-氧杂磷杂环丁烷作为稳定的晶体,这是典型的环丙基亚乙基三苯基膦与活化的羰基化合物的Wittig反应的结晶。氧杂磷杂环丁烷的X射线分析表明,磷原子位于略微变形的三角双锥体结构的中心。进行这些氧杂磷杂环丁烷的热分解,得到起始的羰基化合物和Wittig反应产物烯烃。