Intermediates for pyrazolyl acetic acid derivatives

Details Intermediates for pyrazolyl acetic acid derivatives Intermediates for pyrazolyl acetic acid derivatives

1996-11-01

1997-09-23

Ramsuer, Robert W.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23118

Patent

active

056706480

ABSTRACT:
The invention discloses a novel process for the preparation of a compound of formula II ##STR1## wherein R.sub.1 is C.sub.1-5 alkyl,
R.sub.2 is hydrogen or C.sub.1-5 alkyl, and
R.sub.3 is optionally substituted phenyl,
comprising the reaction of a 4-hydroxypyrazole of formula III ##STR2## wherein R.sub.1 and R.sub.2 are as defined for formula II, with a benzylhalide of formula IV

REFERENCES:
Tetrahedron Letters, No. 19, Apr. 1971, pp. 1591-1592.

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