Patent ID: 6034265
Filing Date: 2000-03-07
Classification: C07C

Abstract:
A process for synthesizing an aromatic urethane, which comprises:a) reacting an organic carbonate, in an amount which is equal to or greater than a stoichiometric amount, with an aromatic amine having the formula (I), (II) or (III): ##STR3## wherein R is hydrogen, halogen or a hydrocarbyl or hydrocarbyloxy group with up to 8 carbon atoms; A is a divalent hydrocarbon group with from 1 to 6 carbon atoms; n has a value of 0 or 1, and x has a value between 1 and 6, in the presence of a Lewis acid catalyst, at a temperature of 100.degree. to 190.degree. C.; andb) recovering the aromatic urethane from the reaction mixture;wherein step a) is carried out by maintaining reaction alcohol in an amount of from 10 to 40 mol % based on a total quantity of alcohol coproduced during the reaction.