Reaction of N-sulfonyl derivatives of 1,4-benzoquinone monoimine with substituted hydrazines
作者:S. A. Konovalova、A. P. Avdeenko、S. A. Goncharova、V. V. D’yakonenko、S. V. Shishkina
DOI:10.1134/s1070428016050055
日期:2016.5
Reaction direction of N-sulfonyl derivatives of 1,4-benzoquinone monoimine with substituted hydrazines depends on the redox potential of the quinone imine and on the basicity of the hydrazine. Aryl (alkyl)hydrazines of high basicity favor the reduction of quinone monoimine. In reactions with less basic aroylhydrazones N'-(4-oxocyclohexa-2,5-dienylidene)aroylhydrazides were obtained only from the alkylsubstituted
Activated sterically strained C=N bond in N-substituted p-quinone mono- and diimines: XIII. Reactions of N-alkyl(aryl, trifluoromethyl)sulfonyl-, N-arylsulfinyl- and N-arylsulfanyl-1,4-benzoquinone monoimines with alcohols
作者:A. P. Avdeenko、S. A. Konovalova、O. N. Mikhailichenko、A. A. Santalova、G. V. Palamarchuk、O. V. Shishkin
DOI:10.1134/s107042801205003x
日期:2012.5
Steric strains arising between the substituent atoms at nitrogen (S, SO, or SO2) and the methyl group located in positions 3 or 5 of the quinoid ring of 3,5-dimethyl-substituted quinone monoimines lead to the increased angle C=N-S. As a result in these quinone monoimines the reactions of 1,2-addition become thermodynamically possible since the formation of quinolide structures with the sp(3)-hybridized carbon atom removes the steric strain.
Reactions of N-aryl(methyl, trifluoromethyl)sulfonyl-1,4-benzoquinone monoimines with sodium sulfinates
作者:A. P. Avdeenko、S. A. Konovalova、O. N. Mikhailichenko、S. V. Shelyazhenko、V. V. Pirozhenko、L. M. Yagupol’skii
DOI:10.1134/s107042801202011x
日期:2012.2
In reactions with sodium sulfinates of N-substituted 1,4-benzoquinone monoimines with the quinoid ring having free positions 2 and/or 6 the fraction of products of 1,4-addition of the sulfinate ion grows in the series ArSO2 -> MeSO2 -> CF3SO2. In the case of 2,6-dimethyl derivatives the 1,6-addition is preferable, and the amount of products of 6,1-addition decreases.
Synthesis and thiocyanation of N-alkyl(trifluoromethyl)sulfonyl 1,4-benzoquinone monoimines
作者:A. P. Avdeenko、S. A. Konovalova、O. N. Mikhailichenko、S. V. Shelyazhenko、V. V. Pirozhenko、L. M. Yagupol’skii
DOI:10.1134/s1070428011040075
日期:2011.4
New N-alkyl(trifluoromethyl)sulfonyl 1,4-benzoquinone monoimines were synthesized, and their thiocyanation gave 5-alkyl(trifluoromethyl)sulfonylamino-1,3-benzoxathiol-2-ones. An intermediate thiocyanation product, 5-trifluoromethylsulfonylamino-1,3-benzoxathiol-2-imine, was isolated for the first time.