A process for production of 2-pyrazolin-5-ones of the general formula (I):
which comprises cyclizing hydrazone derivatives of the general formula (II):
in the presence of a base;
wherein R1, R2, R3 and R4 each represents a specific group; compounds of the general formula (I) as well as compounds of the general formula (II) and a process for production thereof.
一种生产通式(I)的 2-
吡唑啉-5-酮的工艺:
其中包括将通式(II)的腙衍
生物环化:
在碱存在下;
其中 R1、R2、R3 和 R4 各代表一个特定基团;通式 (I) 的化合物以及通式 (II) 的化合物及其生产工艺。