Process for the procuction of aromatic urethanes
AssigneeMinistero dell'Universita' e della Ricerca Scientifica e Technologica
InventorsAldo Bosetti, Pietro Cesti, Emanuele Cauchi, Ignazio Prestifilippo
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Abstract
A process is described for the preparation of aromatic urethanes in which organic carbonate in a stoichiometric quantity or in a quantity higher than the stoichiometric value is reacted with an aromatic amine operating in the presence of a carbamation catalyst, wherein this catalyst is selected from zinc and/or copper carbonate hydroxide. The process gives high yields and selectivity in the useful reaction product.
Claims9
A process for the preparation of aromatic urethanes by the reaction of an organic carbonate with an aromatic amine operating in the presence of a catalyst, characterized in that said catalyst is a zinc and/or copper carbonate hydroxide having the general formula (I):
- M.sub.a N.sub.b (OH).sub.c (CO.sub.3).sub.d (H.sub.2 O).sub.e(I)
- wherein:
- M and N represent a metal selected from zinc and/or copper;
- a and b vary from 0 to 4, with a proviso that they are not both 0;
- c and d vary from 1 to 7;
- and e has a value varying from 0 to 6.
Dependencies are inferred from the claim text.