Process for synthesis of N,N-disubstituted hydrazone

Details Process for synthesis of N,N-disubstituted hydrazone Process for synthesis of N,N-disubstituted hydrazone

1989-12-05

1991-02-05

Ramsuer, Robert W.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544102, 548503, 548561, 564112, 564251, C07C24916, C07D20982

Patent

active

049906259

ABSTRACT:
A process for synthesizing an N,N-disubstituted hydrazone comprises carrying out nitrozation by adding an aqueous solution of sodium nitrite to a solution having one part by weight of an N,N-disubstituted amine dissolved in 3 to 30 parts by weight of an organic acid, then reducing the nitrozated product to an N,N-disubstituted hydrazine by adding a reducing agent to the mixture containing the nitrozated product, and thereafter adding to the mixture containing the N,N-disubstituted hydrazine a carbonyl compound of the formula: ##STR1## wherein A represents an aromatic hydrocarbon group or an aromatic heterocyclic group which may have a substituent, B represents a hydrogen atom, an alkyl group, an aryl group or an aromatic heterocyclic group, which may have a substituent, thereby performing condensation of the N,N-disubstituted hydrazine with the carbonyl compound.

REFERENCES:
patent: 2754326 (1956-07-01), Bradley
patent: 2945062 (1960-07-01), Hinman
patent: 3359316 (1947-12-01), Biel
patent: 4332948 (1982-06-01), Sakai et al.

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