The first syntheses of asymmetrical esters of iminocarbonic acid are reported.These syntheses were carried out without the separation of intermediates.
Lopyrev, V. A.,Kurochkin, V. N.,Titova, I. A.,Voronkov, M. G.
Process for the preparation of N-cyanoimidocarbonates
The present invention provides a process for the preparation of N-cyanoimidocarbonates of the general formula: STR1 in which R1 and R2 are the same and are alkyl radicals containing up to 4 carbon atoms or R1 and R2 are joined together to give an ethylene or propylene chain which is optionally substituted by an alkyl radical containing up to 3 carbon atoms, wherein an imidocarbonate obtained in aqueous alkaline solution from the appropriate alcohol and cyanogen chloride is added with an acid to an aqueous solution of cyanamide in such a manner that the reaction mixture has a pH value of from 3 to 8.
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(2008/06/13)
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