Process for the preparation of Schiff's bases by the reaction of

Details Process for the preparation of Schiff's bases by the reaction of Process for the preparation of Schiff's bases by the reaction of

1980-01-10

1981-07-28

Trousof, Natalie

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

Organic compounds

Amino nitrogen containing

C07C11906

Patent

active

042811953

ABSTRACT:
Schiff's bases of the formula ##STR1## are obtained by reacting an amine H.sub.2 N--R.sub.3 with a ketone ##STR2## in presence of calcium hydrogen phosphate, apatite, aluminum oxide, aluminium hydroxide and/or Fuller's Earth and subsequent removing the water by azeotronic distillation.
The products are intermediates for the preparation of phenylene diamines which may be used as age resistors for rubber.

REFERENCES:
patent: 2218587 (1940-10-01), Heinrich et al.
patent: 2533723 (1950-12-01), Dombrow

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