Patent ID: 8884047

Claim:
A method for producing at least one N-substituted carbamic acid-O-aryl ester wherein the N-substituted carbamic acid-O-aryl ester is an N-substituted carbamic acid ester in which oxygen atoms of the carbamic acid group (—NHCOO—) are bonded to an aromatic ring derived from an isolated compound having an ureido group of formula (1) and an aromatic hydroxy composition containing at least one type of aromatic hydroxy compound of formula (2), the method comprising the steps of obtaining the isolated compound having the ureido group of formula (1); and carrying out esterification with the compound of formula (2) or esterification with the compound of formula (4) and subsequent transesterification with the compound of formula (2) from the isolated compound having the ureido group of formula (1): wherein R 1 represents an organic group containing an integral number of carbon atoms within a range of from 1 to 85, that is substituted by a number a of ureido group(s), and the a represents an integer of from 1 to 10, ring A represents an organic group, which contains an aromatic group substituted by a number b of hydroxy group(s) at arbitrary location(s) that maintain aromatic properties, and wherein ring A contains an integral number of carbon atoms within a range of from 6 to 50, which may be a single or multiple heterocyclic ring, and which is substituted by at least one substituent selected from the groups of substituents indicated below (i)-(v), and the b represents an integer of from 1 to 6, and (i) a hydrogen atom; (ii) a group composed of carbon atoms and hydrogen atoms (which may also form a ring structure by bonding with ring A); (iii) a group composed of carbon atoms, hydrogen atoms and oxygen atoms (excluding groups containing a carbonyl group, an ester group, a terminal methine group and an alcoholic OH group, a carboxyl group, a NH 2 group, a NH group, a NOH a group, a SH group a SO 3 H group or a SOH group); (iv) a halogen atom; and (v) a group composed of atoms selected from carbon atoms, hydrogen atoms, oxygen atoms, nitrogen atoms, sulfur atoms and halogen atoms (excluding groups containing a carbonyl group, an ester group, a terminal methine group and an alcoholic OH group, a carboxyl group a NH 2 group, a NH group, a NOH group, a SH group, a SO 3 H group or a SOH group), and R 2 represents an aliphatic group, or an aliphatic group in which an aromatic group is bonded, which contains an integral number of carbon atoms within a range of from 1 to 14, and the OH group of the alcohol of formula (4) is an OH group that is not bonded to an aromatic ring.