Process for the preparation of pyrazoles

Details Process for the preparation of pyrazoles Process for the preparation of pyrazoles

1996-03-04

1997-02-25

McKane, Joseph

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

5483751, 5483761, 5483771, C07D207323, C07D207325

Patent

active

056060742

ABSTRACT:
The invention relates to a process for the preparation of pyrazoles of the formula (I) ##STR1## in which R represents hydrogen, alkyl, unsubstituted or substituted cycloalkyl, unsubstituted or substituted aryl or unsubstitited or substituted arylalkyl,
by reaction of propenylideneammonium chloride derivatives of the formula (II) ##STR2## with hydrazines of the formula (III)

REFERENCES:
patent: 5118853 (1992-06-01), Lee et al.
H. Bredereck et al., Chemische Berichte, vol. 93, No. 5, pp. 1208-1211 (1960).
CA93: 45871 Orthoamides. XXXIV. Syntheses with vinylidenediamines. Kantlehner et al. p. 856. 1980.
CA117: 191344 Preparation of . . . intermediates. Lee et al., p. 749. 1992.

Affiliated with

Also associated with

Rating

Process for the preparation of pyrazoles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of pyrazoles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of pyrazoles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1975177