Synthesis of hydrazine and chlorinated derivatives of...

Details Synthesis of hydrazine and chlorinated derivatives of... Synthesis of hydrazine and chlorinated derivatives of...

2007-05-22

2007-05-22

Wilson, James O. (Department: 1624)

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

Reexamination Certificate

active

10745230

ABSTRACT:
The present invention relates to both a novel method of preparing hydralazine hydrochloride and to a novel method of preparing hydrazine derivatives of compounds containing a pyridazine ring, including, for example, pyridazines, phthalazines and other compounds containing the pyridazine ring.

REFERENCES:
patent: 2484029 (1949-10-01), Hartmann et al.
patent: 2001-172248 (2001-06-01), None
Druey and Ringier, “Hydrazinderivate der Phtalazin- und Pyridazinreihe” Helvetica Chimica Acta, vol. 34(21), pp. 195-210 (1951).
Sycheva et al, “Synthesis of Apressine” Meditsinskaya Promyshlennost SSSR, vol. 14(2), pp. 13-17 (1960) Caplus Abstract.
Butula et al, “Eine neue Methode zur Gewinnung von 1-Hydrazino-phthalazin” Croatica Chemica Acta, vol. 52(1), pp. 43-45 (1979).

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