Process for the preparation of pyridine-4-aldehyde phenylhydrazo

Details Process for the preparation of pyridine-4-aldehyde phenylhydrazo Process for the preparation of pyridine-4-aldehyde phenylhydrazo

1980-06-26

1982-01-12

Jiles, Henry R.

Harness for working animal

C07D21353, C09B 5500

Patent

active

043106641

ABSTRACT:
Pyridine-4-aldehyde phenylhydrazones are prepared by catalytic hydrogenation of 4-cyano-pyridine under normal pressure or almost normal pressure in the presence of phenylhydrazine or nuclear-substitution products thereof, in an aqueous medium in the absence of organic solvents, at a pH value between 9 and 12, preferably between 9.5 and 11, and in a temperature range from 0.degree. to 60.degree. C.

REFERENCES:
patent: 3274206 (1966-09-01), Wilbert et al.
patent: 3419551 (1968-12-01), Komachiya et al.
patent: 3573287 (1971-03-01), Schorr et al.
patent: 4026885 (1977-05-01), Frey et al.
patent: 4237275 (1980-12-01), Bader et al.
Zajac, Jr. et al., J. Org. Chem., 1971, vol. 36(23), pp. 3539-3541.

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