Process for the production of aromatic and cycloaliphatic dicarb

Details Process for the production of aromatic and cycloaliphatic dicarb Process for the production of aromatic and cycloaliphatic dicarb

1974-12-30

1977-10-11

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260558A, C07C10204

Patent

active

040535100

ABSTRACT:
A dicarboxylic acid diamides is produced by reacting urea with a terephthalic, isophthalic, 2,6-naphthalene-dicarboxylic or 1,4-cyclohexane-dicarboxylic acid at an elevated temperature of about 30.degree.-200.degree. C. and in a liquid reaction medium consisting essentially of chlorosulfonic acid or an at least 10% by weight oleum. The diamide products are widely used in the preparation of pharmaceuticals and protective agents for plants.

REFERENCES:
patent: 1989968 (1935-02-01), Bruson
patent: 2723266 (1955-11-01), Lincoln et al.
patent: 2849482 (1958-08-01), Raecke et al.
patent: 3607918 (1971-09-01), Jurewicz
Chem. Abs., vol. 77, 1972, p. 342, 125916z, Article by Freidlin, G. N. et al.

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