1852-14-8Relevant academic research and scientific papers
Method for Preparing Diureido Compounds
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Paragraph 0037; 0056-0058, (2016/12/22)
The present invention relates to a method for producing diureido by making diamine having 2 to 13 carbon atoms react with urea. The producing method uses alcohol having 3 to 12 carbon atoms as a reaction solvent and uses tetraalkylammonium hydroxide as a catalyst. According to the producing method of the present invention, the diureido can be produced in a high yield and in a short time.COPYRIGHT KIPO 2016
Process for the preparation of asymmetrically substituted ureas, carbamates or thiocarbamates
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, (2008/06/13)
Process for the preparation of asymmetrically substituted ureas, carbamates, thiocarbamates or substituted isocyanates by reaction of an adduct of isocyanic acid and a tertiary amine with a primary and secondary amine, an alcohol, a thiol or a compound having one or two non-cumulated olefinic double bonds, and a process for the preparation of N-mono- or N,N-disubstituted ureas by reaction of ammonium isocyanate with a primary or secondary amine in a diluent.
Process for the preparation of substituted isocyanates
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, (2008/06/13)
Process for the preparation of asymmetrically substituted ureas, carbamates, thiocarbamates or substituted isocyanates by reaction of an adduct of isocyanic acid and a tertiary amine with a primary and secondary amine, an alcohol, a thiol or a compound having one or two non-cumulated olefinic double bonds.
Process for the preparation of asymmetrically substituted ureas
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, (2008/06/13)
Process for the preparation of asymmetrically substituted ureas by reaction of a gaseous mixture of isocyanic acid and ammonia having a temperature of 260° to 600° C. with a primary or secondary amine.
