N,N'-Disubstituted hexahydropyrimidines

Details N,N'-Disubstituted hexahydropyrimidines N,N'-Disubstituted hexahydropyrimidines

1978-06-16

1982-10-12

Coughlan, Jr., Paul M.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

260814, C07D23502, C07D23506

Patent

active

043540252

ABSTRACT:
This invention relates to hexahydropyrimidines prepared by condensing cyclohexanone, or derivatives thereof, with ammonia to yield tetrahydropyrimidines, which can be reduced to hexahydropyrimidines, whose pyrimidine ring can be broken to yield diamines having one primary amino group, which primary group can be reacted with a carbonyl to yield Schiff base imines, which Schiff base imines can be reduced to N-substituted amino groups. The two amino groups of the reduced Schiff base can be bridged by reaction with an aldehyde to form the novel N,N'-disubstituted hexahydropyrimidines.
This invention also relates to the use of these products as antioxidants.

REFERENCES:
patent: 2486648 (1949-11-01), Haury
patent: 2525855 (1950-10-01), Bergmann
patent: 3248243 (1966-04-01), Hodge et al.
patent: 4085105 (1978-04-01), Alink
Amarego et al., Chem. Abstracts, 71 (1969), 69950t.

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