Process for the preparation of 1-phenylpyrazoline-3-carboxylic a

Details Process for the preparation of 1-phenylpyrazoline-3-carboxylic a Process for the preparation of 1-phenylpyrazoline-3-carboxylic a

1998-09-04

1999-06-01

Ramsuer, Robert W.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23106

Patent

active

059089385

ABSTRACT:
There is described a process for the preparation of 1-phenylpyrazoline-3-carboxylic acid derivatives of the formula III by means of base-catalyzed reaction of hydrazones of the formula I with olefins of the formula II ##STR1## where Ph, R.sup.1, R.sup.2, R.sup.3, X and Y have the following meanings: Ph is optionally substituted phenyl,

REFERENCES:
patent: 5037468 (1991-08-01), Sohn et al.
patent: 5103017 (1992-04-01), Sohn et al.
patent: 5700758 (1997-12-01), Rosch et al.
patent: 5703008 (1997-12-01), Rosch et al.

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