Preparing aromatic urethans
AssigneeAnic S.p.A.
InventorsUgo Romano, Giancarlo Fornasari, Sandro Di Gioacchino
Life of this patent
Estimating the term…
Abstract
A process for the preparation of aromatic urethans by reaction between aromatic amines and alkyl carbonates, said reaction being carried out in the presence of a catalyst composed of an alcoholate of an alkali metal or an alkaline earth metal. The reaction is caused to take place at a temperature which is variable from +50.degree. C. and +150.degree. C., in the liquid phase and with a molar ratio of the carbonate to the amine of from 10:1 to 1:10.
Claims9
A process for the preparation of aromatic urethans comprising the step of reacting, at a temperature between about 50.degree. C. and about 150.degree. C., an aromatic amine with an alkyl carbonate in the presence of a catalyst selected from among the alcholates of alkali metals or alkaline earth metals.
Dependencies are inferred from the claim text.