Treatment of the 3-monomethanesulfonates of 1,2,2-trisubstituted 1,3-propanediols under phase-transfer conditions affords 2-aryl (or alkyl)-3,3-dialkyloxetanes. Twelve oxetanes have been obtained by this method; three of these oxetanes have been obtained enantiomerically pure as both enantiomers starting from the appropriate enantiomerically pure 1,3-diols. In these reactions the chiral center does not undergo inversion and the oxetanes have the same absolute configuration as the starting 1,3-diols.
在相转移条件下对1,2,2-三取代
1,3-丙二醇的3-单
甲磺酸酯进行处理,可以得到2-芳基(或烷基)-3,3-二烷氧杂
环丁烷。通过这种方法获得了十二种氧杂
环丁烷;其中三种氧杂
环丁烷是作为两个对映体从相应的对映体纯的1,3
-二醇中获得的。在这些反应中,手性中心不发生反转,氧杂
环丁烷与起始的1,3
-二醇具有相同的绝对构型。