1-Amino-pyrazolic derivatives

Details 1-Amino-pyrazolic derivatives 1-Amino-pyrazolic derivatives

1975-03-07

1976-03-16

Moyer, Donald B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

424273, C07D23146, A61K 31415

Patent

active

039445631

ABSTRACT:
1-AMINO-5-ALKOXY-PYRAZOLE COMPOUNDS OF THE FORMULA: ##EQU1## wherein R.sub.1 represents a lower alkyl group having 1 to 4 carbon atoms, R.sub.2 and R.sub.3, which may be identical or different, represent a hydrogen atom, a lower alkyl group, a phenyl group, a phenyl group substituted by one or more groups selected from lower alkyl, halogen, nitro and lower alkoxy; R.sub.4 represents an amino group, a mono-lower alkyl amino group or a di-lower alkyl amino group; as well as their salts with a mineral or organic acid.
A method for the preparation thereof, consisting essentially in internally transforming, in the presence of hydrazine, a 5-hydrazino-isoxazole (or 5-halogenoisoxazole) derivative and alkylating the 5-hydroxy-derivative obtained with a suitable diazoalkane.

REFERENCES:
patent: 3207763 (1965-09-01), Harder et al.
patent: 3694456 (1972-09-01), Noguchi et al.
Bull. Soc. Chim. [4]; No. 1, p. 234, (1907).

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