Method for the production of 2,4,6-triketohexahydrotriazines

Details Method for the production of 2,4,6-triketohexahydrotriazines Method for the production of 2,4,6-triketohexahydrotriazines

1979-05-14

1981-08-11

Ford, John M.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544222, C07D25134

Patent

active

042835356

ABSTRACT:
A method of preparing 2,4,6-triketohexahydrotriazines which comprises catalytically trimerizing an organic isocyanate at 60.degree.-150.degree. C. in an inert, polar solvent present in an amount of 5-40 weight % with respect to the quantity of said isocyanate, in the presence of 0.1-5 weight % of a catalyst of the formula ##STR1## or hydrated derivatives of said catalyst, wherein R is selected from the group consisting of hydrogen and C.sub.1 -C.sub.4 alkyl, and Me.sup.+2 is a bivalent metal cation; interrupting the trimerization at a conversion of about 50% by cooling; and then isolating the 2,4,6-triketohexahydrotriazine.

REFERENCES:
patent: 3517002 (1970-06-01), Heiss
patent: 3619338 (1971-11-01), Gilman
patent: 3641024 (1972-02-01), Argabright et al.
patent: 3779940 (1973-12-01), Argabright et al.
patent: 3840496 (1974-10-01), Argabright et al.
patent: 3852220 (1974-12-01), Kimmel et al.
patent: 3919218 (1975-11-01), Schmitt et al.
patent: 4145544 (1979-03-01), Kuehn

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