p-toluenesulfinate. 1-Fluorovinyl p-tolyl sulfoxides 1 were prepared in good yields by Horner−Wittig reaction of 2 with aldehydes, in excellent enantiomeric excess (ee). With ketones, yields were generally low. Stereoselectivity was high for aliphatic aldehydes, producing (Z) isomers, and for benzaldehydes, yielding the (E) isomers. A two-step, one-pot procedure for the conversion of 3 into 1 was also developed
(小号小号) - [
氟(p -tolylsulfinyl)甲基] diphenylphosphane氧化物(2)与来自(
氟甲基)diphenylphosphane氧化物(完整的立体选择性获得3)和(小号) - ( - ) -薄荷基p -toluenesulfinate。1-Fluorovinyl
对甲苯基亚砜1是通过2与醛的Horner-Wittig反应以极好的对映体过量(ee)制备的,收率很高。使用酮时,收率通常较低。对于脂肪醛,产生(Z)异构体和
苯甲醛,产生(E)的立体选择性高。)异构体。还开发了两步一锅法将3转化为1的过程。2的溶剂化为对映体纯的(S)-1-(
氟甲基)亚磺酰基-4-甲基苯(7)提供了第一条途径。