A method for the preparation of isocyanates in which: (i) a first organosilicon compound having at least one silicon atom Si
1
and a unit of formula G-I bound thereto
is converted to a third organosilicon compound having a unit of formula G-II
by silylation of the NH group of the unit of formula G-I with a second organosilicon compound having one silicon atom Si
2
; and (ii) the third organosilicon compound is reacted to an isocyanate by thermolysis, whereby the unit of formula G-II is converted to an isocyanate group.
Conversion of alkyl carbamates into amines via treatment with trimethylsilyl iodide
作者:Michael E. Jung、Mark A. Lyster
DOI:10.1039/c39780000315
日期:——
Reaction of the alkylcarbamates (1) with trimethylsilyliodide (2) followed by methanolysis of the resulting trimethylsilylcarbamates (4), affords high yields of the corresponding amines (5), even in the case of very sensitive compounds such as 2,3-diazabicyclo[2.2.1]heptane (5h).
of the solvolysis reaction of various trimethylsilyl esters of N-aryl carbamic acid with isopropanol was studied. UV spectrophotometry was used to monitor the reaction and the pseudo first order rate constants were determined. The experiments were carried out in dioxane solutions containing lithium chloride. A reaction mechanism is suggested on the basis of the dependence of the reaction rate on ionic
Sheludyakov, V. D.; Gusev, A. I.; Dmitrieva, A. B., Journal of general chemistry of the USSR, 1983, vol. 53, # 10, p. 2051 - 2054
作者:Sheludyakov, V. D.、Gusev, A. I.、Dmitrieva, A. B.、Los', M. G.、Kirilin, A. D.
DOI:——
日期:——
Homogeneous catalytic formation of carbon-nitrogen bonds. 2. Catalytic activation of the silicon-nitrogen bond
作者:M. T. Zoeckler、R. M. Laine
DOI:10.1021/jo00163a023
日期:1983.7
Chemical transformations of diazoles in the reactions of carboxylation, N-siloxycarbonylation, and transsilylation
作者:L. O. Belova、M. V. Pletnev、A. D. Kirilin
DOI:10.1134/s1070363213070116
日期:2013.7
The behavior of 3,5-dimethylpyrazole, 3(5)-methylpyrazole, imidazole and their trimethyl-silyl derivatives in carboxylation, N-siloxycarbonylation, and transsilylation reactions was studied. A new Nsiloxycarbonylation reagent, diazole trimethylsilyl derivative-carbon dioxide, was found. This reagent makes it possible to obtain easily O-silylurethanes starting from primary, secondary amines and hydrazine derivatives, as well as to develop a convenient one pot synthesis method for trimethylsiloxycarbonyldiazoles.