Process for the preparation of 3-chloro-5-hydroxypyrazoles

Details Process for the preparation of 3-chloro-5-hydroxypyrazoles Process for the preparation of 3-chloro-5-hydroxypyrazoles

1980-03-12

1981-03-17

Jiles, Henry R.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548116, 548360, 548363, 548367, 542423, 542413, 424200, C07D23120, C07D23122

Patent

active

042569028

ABSTRACT:
Phosphoric or thiophosphoric esters of 5(3)-hydroxypyrazoles are disclosed having the formula: ##STR1## wherein: R=H; alkyl with 1-7 carbon atoms optionally substituted with halogens, CN, and carboalkoxy groups; phenyl optionally substituted; benzyl; alkenyl; or alkynyl;

REFERENCES:
patent: 2439098 (1948-04-01), Porter et al.
patent: 3166475 (1965-01-01), Fiordalisi
patent: 3644374 (1972-02-01), Buijle et al.
Wiley et al., "Pyrazolones, Pyrazolidones and Derivatives", Interscience, New York, 1964, pp. 5-6, 14-16.

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