The Ag+-induced reaction between N-cyclohexyl-α-chloro-propionaldonitrone and the two diastereomeric 2-butenes in liquid SO2 is a stereospecific cis-addition. The use of N-cyclo-hexyl-α,β-dichloro-propionaldonitrone in this type of reaction provides a preparative route from olefines to α-methylidene-butyrolactones.
在液体SO 2中,N-环己基-α-
氯-
丙二腈与两个非对映体
2-丁烯之间的Ag +诱导的反应是立体特异性顺式加成。在这种类型的反应中使用N-环己基-α,β-二
氯-
丙二腈提供了从烯烃到α-亚甲基
-丁内酯的制备途径。