Chemoselective synthesis of carbamates using CO2 as carbon source
Synthesis of carbamates directly from amines using CO2 as the carbon source is a straightforward and sustainable approach. Herein, we describe a highly effective and chemoselective methodology for the synthesis of carbamates at room temperature and atmosp
Riemer, Daniel,Hirapara, Pradipbhai,Das, Shoubhik
p. 1916 - 1920
(2018/08/17)
Reductive electrochemical carboxylation in context with quantum chemical calculations
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Hess,Komenda,Pospichal
p. 900 - 904
(2007/10/02)
Elektrochemische Reduktion von Amidinen
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Hess, Ulrich,Bluemcke, Cay-Olaf
p. 144 - 145
(2007/10/02)
EFFECT OF STRUCTURAL FACTORS ON THE KINETICS OF THE REACTION OF ALKYL CHLOROFORMATES WITH ALIPHATIC-AROMATIC AMINES
As a result of investigation of the effect of the structure of the reagents on the kinetics of acylation of aliphatic-aromatic amines by alkyl chloroformates it was shown that the reaction takes place by an addition-elimination mechanism without a controlling stage.The kinetic data obey the two-parameter Taft equation.
Orlov, S. I.,Chimishkyan, A. L.,Lapin, A. S.,Grabarnik, M. S.
p. 1905 - 1908
(2007/10/02)
Electrosynthesis of N-Substituted DL-Arylglycineesters and 1,2-Diarylamino-1,2-diarylethanes by Cathodic Reduction of Azomethines in the Presence of Carbon Dioxide
The electroreduction of the N-arylidene-arylamines 1-12 in CO2-saturated solvents of low proton availability as DMF at markedly more positive potentials than carbon dioxide end up in carboxylating the C-atom and hydrogenating the nitrogen of the C=N-double bond.The resulting N-arylsubstituted DL-arylglycines and traces of carbamates may be isolated as esters, adding ethylchloride during the electrolysis.A competing pathway of the electrocarboxylation is the C-C-hydrodimerisation and the hydrogenation of the C=N-double bond, whose importance increases with the water content of the solvent.Based on cyclic-voltametric evidence and product analysis the mechanism of the reductive electrocarboxylation reaction is discussed in terms of nucleophilic attack of the azomethine anion radical on a proton or CO2.