Preparation of trans-cyclohexane-1,4-diurethanes

Details Preparation of trans-cyclohexane-1,4-diurethanes Preparation of trans-cyclohexane-1,4-diurethanes

1979-06-18

1981-06-23

Torrence, Dolph H.

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

Organic compounds

Carboxylic acid esters

26032625, 2603474, 544219, 544296, 544357, 546261, 548187, 548225, 548251, 548255, 548265, 548337, 548375, 549 65, C07C12504

Patent

active

042752230

ABSTRACT:
A process is disclosed for selectively making trans-cyclohexane-1,4-diisocyanate, trans-cyclohexane-1,4-diamine, a trans-cyclohexane-1,4-diurethane, a trans-cyclohexane-1,4-diurea and trans-cyclohexane-1,4-disulphonyl urea by reacting ammonia with a mixture of cis and trans cyclohexane-1,4-dicarboxylic acid, a lower alkyl ester, a glycol ester, an oligomeric ester or a polyester to make a solid trans-dicarboxylic acid diamide in a first step. The diamide is chlorinated to form trans-cyclohexane-1,4-dicarboxylic acid-bis-N-chloramide. The latter compound is then converted into a

REFERENCES:
patent: 3518307 (1970-06-01), Zurich et al.
patent: 3644459 (1972-02-01), Cross

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