Cushman, Darby & Cushman
Preparation of urethanes by carbonylation
 A process for preparation of urethanes by reacting an organic hydroxyl group-containing compound and carbon monoxide with a primary amine and oxygen in the presence of a non-noble metal or lanthanide metal catalyst system, particularly a cerium catalyst. 
Industrial Technology Research Institute
C
C07C
inventional
Puh Tsu-Kung Kuo-Liang Jih-Liang
Shieh Chuang Loh Chen