Cyclic nitrones, C-phenyl-N-methylnitrone, benzonitrile oxide, and 2,4,6-trimethylbenzonitrile oxide react in benzene with cis-cyclobut-3-ene-1,2-diol to give as the sole or the dominant products the sterically disfavoured syn-adducts.
环硝酮,C-苯基-N-甲基硝基,氧化
苄腈和2,4,6-三甲基
苄腈氧化物在苯中与顺式-环丁-3-烯-1,2
-二醇反应生成唯一或占主导地位的产物在空间上不利的顺式加合物。