Process for preparing a 2-alkyl-1,4,5,6-tetrahydropyrimidine

Details Process for preparing a 2-alkyl-1,4,5,6-tetrahydropyrimidine Process for preparing a 2-alkyl-1,4,5,6-tetrahydropyrimidine

1987-09-16

1989-11-14

Shah, Mukund J.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544298, C07D23926, C07D23936

Patent

active

048809292

ABSTRACT:
The invention relates to a process for preparing a 2-alkyl-1,4,5,6-tetrahydropyrimidine with the formula ##STR1## where R represents a straight or branched chain with 1-8 C-atoms or a phenyl group from 1,3-diaminopropane and an alkanecarboxylic acid, in which the alkyl group of such an acid is the same as the R group described above, wherein the starting materials are reacted in the gas phase in the presence of an oxide catalyst at a temperature of between 250.degree. and 450.degree. C. and from the reaction mixture thus obtained the 2-alkyl-1,4,5,6-tetrahydropyrimidine is recovered.

REFERENCES:
patent: 2704757 (1955-03-01), Dornfeld
patent: 3041338 (1962-06-01), Phillips
patent: 3050523 (1962-08-01), Erner et al.
patent: 4376201 (1983-03-01), Pews
patent: 4667034 (1987-05-01), van de Moesdijk et al.
patent: 4719299 (1988-01-01), van der Stoel

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