3(5)-aryl-5(3)-[2-(2-hydroxyphenyl)-2-hydrazonoethyl]-1H-pyrazoles, which upon acid hydrolysis gave 3(5)-aryl-5(3)-[2-(2-hydroxyphenyl)-2-oxoethyl]-1H-pyrazoles. The reaction mechanisms for these transformations, involving 1,6- followed by 1,4-conjugate additions, are discussed and the structures of all new compounds were established by NMR studies.
用于合成新方法(ê)-3-卤代-2-
苯乙烯基-4- ħ -苯并
吡喃-4-酮来建立。这些化合物与
水合
肼反应,得到新的和意想不到的3(5) -芳基-5-(3) - [2-(2-羟基苯基)-2- hydrazonoethyl] -1- ħ -pyrazoles,其在酸
水解,得到3( 5) -芳基-5-(3) - [2-(2-羟基苯基)-2-氧代乙基] -1- ħ -pyrazoles。这些转化反应机理,涉及1,6-随后1,4-共轭加成,进行了讨论,并通过NMR研究建立的所有新化合物的结构。