2158-09-0Relevant articles and documents
Preparation of organic compounds using as a reactant an adduct of isocyanic acid and a tertiary amine or an ether
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, (2008/06/13)
Process for the removal of isocyanic acid from a gaseous mixture of isocyanic acid and ammonia by introducing a tertiary amine or ether at 250° to 600° C. The gaseous reaction mixture is passed into an inert diluent and cooled, to condense an adduct of isocyanic acid and tertiary amine or ether, and the ammonia being removed as a gas.
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
-
, (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.
Some Extensions of von Braun (BrCN) Reaction on Organic Bases, Part IV
Siddiqui, Salimuzzaman,Haider, S. Imtiaz,Ahmad, S. Salman,Siddiqui, B. Shaheen
, p. 546 - 549 (2007/10/02)
Extensions of von Braun cyanogen bromide reaction have been undertaken on some aliphatic and heterocyclic amines.Monocyanamides of all these bases yielded their respective urea and carboxamide derivatives on hydrolysis with dilute hydrochloric acid.They also gave the amido derivatives on reaction with Zn/HCl, as in the case of diisobutyl and di-2-butyl cyanamides. - Key words: von Braun Cyanogen Bromide Reaction