The invention is directed to a process for the preparation of a cyclic carbamate starting with o-aminobenzyl alcohol and/or a suitable salt thereof, which is reacted with a cyclisation agent selected from phosgene, diphosgene, triphosgene and mixtures thereof, and in that the reaction carried out in the presence of an aqueous base, and a water-immiscible organic solvent, said organic solvent mainly comprising at least one compound selected from C
2-5
-alkyl C
2-5
-carboxylates and mixtures of at least one C
2-5
-alkyl C
2-5
-carboxylate with at least one C
5-8
-alkane.
本发明涉及一种制备环状
氨基甲酸酯的方法,其以o-
氨基
苄醇和/或适当的盐为起始物,与选择自
光气、双
光气、
三光气和其混合物的环化试剂反应,并在
水性碱和一种不溶于
水的有机溶剂的存在下进行反应,所述有机溶剂主要包括至少一种选择自C2-5烷基C2-5
羧酸酯和至少一种C5-8
烷烃的混合物。