Triphenylmethyl azo and hydrazino substituted pyridazines

Details Triphenylmethyl azo and hydrazino substituted pyridazines Triphenylmethyl azo and hydrazino substituted pyridazines

1986-02-20

1986-12-30

Daus, Donald G.

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

Organic compounds

Azo

544224, C07C10704, C07D23712, C07D23720

Patent

active

046329820

ABSTRACT:
Preparation of ethyl {6-[ethyl-(2-hydroxypropyl)amino]-3-pyridazinyl}hydrazino carboxylate is disclosed, from 3-chloro-6-hydrazinopyridazine in protected form, which is oxidized to yield the corresponding azo derivative, which is treated with ethyl-(2-hydroxypropyl)amine in the presence of strong bases, the corresponding amino derivative being subjected to reduction and deprotection, and finally acylated to yield ethyl{6-[ethyl-(2-hydroxypropyl)amino]-3-pyridazinyl}hydrazinocarboxylate.

REFERENCES:
patent: 3642792 (1972-02-01), Bellasio et al.
patent: 3769278 (1973-10-01), Pifferi
patent: 4002753 (1977-01-01), Carpi et al.
patent: 4086343 (1978-04-01), Dorigotti et al.

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