The present disclosure relates to a method for preparing a disubstituted urea and carbamate compounds simultaneously through a one-pot reaction of an amine, carbon dioxide and an alkylene oxide compound in the presence of an ionic liquid-based complex catalyst system containing indium. In accordance with the present disclosure, a disubstituted urea and carbamate compounds can be prepared simultaneously at high yield. In addition, the ionic liquid-based catalyst containing indium according to the present disclosure is economical because it can be reused several times.

Claims

9 · 1 independent · depth 2

9 granted claims

›1.independentA method for preparing a disubstituted urea represented by Chemical Formula 1 and carbamate compounds represented by Chemical Formula 2 and Chemical F…+8

›2.↳ 1The method of claim 1, wherein the cation of the ionic liquid is selected from the group consisting of 1-butyl-3-methylimidazolium (Bmim), tetra-n-but…d2

›3.↳ 1The method of claim 1, wherein the main catalyst is used in an amount of 1/5000 equivalent- 1/50 equivalent based on the moles of the amine.d2

›4.↳ 1The method of claim 1, wherein the main catalyst and the promoter are added at an equivalence ratio of 1:1-1:5.d2

›5.↳ 1The method of claim 1, wherein the alkylene oxide is used in an amount of 0.5 equivalents-2 equivalents based on the moles of the amine.d2

›6.↳ 1The method of claim 1, wherein the amine is selected from the group consisting of methylamine, ethylamine, isopropylamine, butylamine, isobutylamine, …d2

›7.↳ 1The method of claim 1, comprising performing the reaction for one hour to four hours at 40° C. to 200° C. under a carbon dioxide pressure of 300 psig …d2

›8.↳ 1The method of claim 1, comprising performing the reaction either in the absence of a solvent or in the presence of at least one solvent selected from …d2

›9.↳ 1The method of claim 1, wherein the reaction is a one-pot reaction.d2

Classifications

4 codes

IPC · International Patent Classification

Section C — Chemistry; metallurgy

C07D263/04
C07C269/04
C07D263/22
C07C273/18

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Michael Barker

art unit 1626 · TC 1600

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20150133676 A1	14 May 2015

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