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1. (WO2018024828) IMPROVED PROCESS FOR THE PREPARATION OF CARBAMATES

Pub. No.:    WO/2018/024828    International Application No.:    PCT/EP2017/069659
Publication Date: Fri Feb 09 00:59:59 CET 2018 International Filing Date: Fri Aug 04 01:59:59 CEST 2017
IPC: C07C 269/04
C07C 271/20
Applicants: TAMINCO BVBA
Inventors: VAN WAES, Frederik
MOONEN, Kristof
ULRICHTS, Dieter
Title: IMPROVED PROCESS FOR THE PREPARATION OF CARBAMATES
Abstract:
A process for the preparation of N-(dialkylaminoalkyl)-carbamic acid esters, in particular (propyl N-[3-(dimethylamino)propyl] carbamate) comprising an oxidative carbonylation reaction of a compound of general structure (II) wherein each of R1 and R2, equal to or different from each other, are independently selected from an alkyl group having 1 to 10 carbon atoms, which is optionally substituted by at least one halogen atom, an aryl group or an aralkyl group; R3 is selected from an alkyl group having 1 to 36 carbon atoms, which is optionally substituted by at least one halogen atom, an aryl group or an aralkyl group; each of R', R" and R4, equal to or different from each other, are independently selected from H, an alkyl group having 1 to 10 carbon atoms, which is optionally substituted by at least one halogen atom, an aryl group or an aralkyl group; and n is an integer in the range from 1 to 8, with a hydroxyl compound of general formula (III), R3-OH (III) and in the presence of a catalyst system.