Both cis-and trans-,-diaryl-,,7,8-tetrahydro[,] oxazepino[, -c]sydnones prepared from the reaction of -( -phenyl- -hydr用 -( -苯基- -羟基丙基)斯德酮和芳香醛反应合成了cis-和trans-,,7,8-四氢-,-二芳基氧杂吖庚因[, -c]斯德酮,这两种异构体在通常情况下都是稳定的,可以用柱层析进行分离提纯.