Process for producing pyridinaldehydes

Details Process for producing pyridinaldehydes Process for producing pyridinaldehydes

1980-06-30

1982-03-30

Jiles, Henry R.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546315, C07D21348

Patent

active

043225365

ABSTRACT:
A new improved process for producing pyridinaldehydes and hydrazone derivatives thereof, for example, pyridinaldehyde-phenylhydrazones, is described. This comprises reacting an aminomethylpyridine with an aldehyde or a ketone to give a compound of the formula ##STR1## isomerizing the compound (III), in the presence of suitable catalysts, to a compound of the formula ##STR2## and converting the compound (V), in the presence of an acid and optionally in the presence of a hydrazine, into a pyridinaldehyde or a pyridinaldehyde-hydrazone. It is possible to produce by the process according to the invention pyridinaldehydes and pyridinaldehyde-hydrazones in a simple manner, under mild ecologically favorable conditions and in good to very good yields.

REFERENCES:
patent: 3008963 (1961-11-01), Mathes et al.
patent: 3531476 (1970-09-01), Miyaho et al.
Karlson, Kurzes Lehrbuch der Biochemie, Stuttgart, Geory Thieme Verlay, 1974, p. 143.

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