公开(公告)号：US10752579B2

公开(公告)日：2020-08-25

申请号：US16328530

申请日：2017-08-31

Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

Inventor： Jun-Chul Choi ,  Norihisa Fukaya ,  Qiao Zhang ,  Hiroyuki Yasuda

IPC: C07C269/04 ,  C07C271/28 ,  C07B61/00

Abstract: A method of production of carbamic acid ester has a high yield and high selectivity and is superior in economy. The method of production of a carbamic acid ester includes reacting an amine, carbon dioxide, and an alkoxysilane compound in the presence of a catalyst containing a zinc compound or an alkali metal compound or in the presence of an ionic liquid. A carbamic acid ester is produced, for example by reacting aniline, carbon dioxide, and tetramethoxysilane at a temperature of 150 to 180° C. in the presence of zinc acetate and 2,2′-bipyridine.