Stereocontrol with phosphine oxides: synthesis of optically active cyclopropyl ketones
作者:Adam Nelson、Stuart Warren
DOI:10.1039/a907321c
日期:——
Treatment of β-keto γ′-hydroxy phosphine oxides, or silylated hemiacetal derivatives of these compounds, with potassium tert-butoxide in tert-butyl alcohol leads to the formation of cyclopropyl ketones. The synthesis of optically active 1,2-di- and 1,2,3-trisubstituted cyclopropyl ketones is described. The reaction is kinetically controlled and the ring-closure is generally stereospecific. A model
用叔丁醇钾在叔丁醇中处理β-酮γ'-羟基氧化膦或这些化合物的甲硅烷基化半缩醛衍生物会导致形成环丙基酮。描述了旋光的1,2-二-和1,2,3-三取代的环丙基酮的合成。反应是动力学控制的,并且闭环通常是立体定向的。描述了一个模型来解释反应的立体化学过程。