Phenylglyoximes are transformed in a single operation into 3-amino-4-phenyl-furoxans which rearrange quantitatively to their 3-phenyl-4-amino-isomers above 80°. A mechanism for the synthesis is proposed and supported by the isolation of intermediates. Proof for the structure of both furoxan isomers and intermediate phenylaminoglyoximes rests on chemical transformations, mechanistic considerations,
苯乙二
肟在一次操作中即可转化为3-
氨基-4-苯基-
呋喃喃酮,后者可在80°以上定量重新排列为它们的3-苯基-4-
氨基-异构体。提出了一种合成机制,并由中间体的分离提供了支持。
呋喃烷异构体和中间体苯基
氨基乙二
肟的结构证明均取决于
化学转化,机理考虑因素以及某些结构变化对UV-光谱的影响。