Process for production of 2-pyrazolin-5-ones

Details Process for production of 2-pyrazolin-5-ones Process for production of 2-pyrazolin-5-ones

1989-04-20

1990-06-05

Ramsuer, Robert W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546279, 548364, 548367, C07D23120

Patent

active

049315650

ABSTRACT:
A process for production of 2-pyrazolin-5-ones having the formula (I): ##STR1## which comprises cyclizing hydrazone derivatives having the formula (II): ##STR2## in the presence of a base; wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represents a specific group; compounds having the formula (I) as well as compounds having the formula (II) and a process for production thereof.

REFERENCES:
patent: 3957814 (1976-05-01), Moller et al.

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