In reaction of N,N-dichloro-4-chlorobenzene- and N,N-dichloro-4-methylbenzenesulfonamides with phenylacetylene were obtained in good yield N-(2-benzene-2,2-dichloroethylidene)arenesulfonamides. The latter undergo nucleophilic addition of water, ethanol, and arenesulfonamides.
New approach to the preparation of p-(1-cyanoethyl)arenesulfonamides by reaction of arylsulfonyl imines of polychloroacetaldehydes with acetone cyanohydrin
作者:A. R. Kaliev、V. Yu. Serykh、I. B. Rosentsveig
DOI:10.1134/s1070428017080061
日期:2017.8
Reaction of N-(2,2,2-trichloroethylidene)- or N-(1-phenyl-2,2-dichloroethylidene)arenesulfonamides with acetonecyanohydrin in acetone in the presence of potassium carbonate led to the formation of N- (2,2,2-trichloro-1-cyanoethyl)- or N-(2-phenyl-2,2-dichloro-1-cyanoethyl)arenesulfonamides.
Diels–Alder trapping vs. amidoalkylation of cyclopentadiene with polychloroacetaldehyde sulfonylimines
作者:Gulnur N. Chernysheva、Maxim D. Katerinich、Igor A. Ushakov、Igor B. Rozentsveig
DOI:10.1016/j.mencom.2020.09.022
日期:2020.9
The reaction of chloral or dichloro(phenyl)acetaldehyde N-arylsulfonylimines with cyclopentadiene, depending on the reaction conditions, affords either Diels–Alder adducts, 2-arylsulfonyl-2-azabicyclo[2.2.1]hept-5-enes, or unexpectedly new amidoalkylated derivatives of cyclopentadiene, N-[(cyclopentadienyl)(polychloromethyl)methyl]arenesulfonamides.
A New Synthesis of 3-(Sulfonamido)benzofurans through an Acid-Promoted Cascade Reaction of N-(2,2-Dichloro-2-phenylethylidene)arenesulfonamides with para-Substituted Phenols
作者:Igor B. Rozentsveig、Gulnur N. Rozentsveig、Valeriy Yu. Serykh、Kirill A. Chernyshev、Galina G. Levkovskaya
DOI:10.1002/ejoc.201100362
日期:2011.8
2-Phenyl-3-(sulfonamido)benzofurans are produced in a cascade reaction of N-(2,2-dichloro-2-phenylethylidene)arenesulfonamides with para-substitutedphenols in the presence of the superacid H2SO4/P4O10 system.
作者:Igor B. Rozentsveig、Valery Y. Serykh、Gulnur N. Chernysheva、Kirill A. Chernyshev、Evgeniy V. Kondrashov、Evgeny V. Tretyakov、Galina V. Romanenko
DOI:10.1002/ejoc.201201006
日期:2013.1
2-dichloro-2-phenyl-1-(heterylamino)ethyl]sulfonamides, in good yields. The latter are easily cyclized to (imidazo[1,2-a]pyridin-3-yl)sulfonamides and (imidazo[2,1-b]thiazol-5-yl)sulfonamides in the presence of alkali, whereas the expected isomeric (imidazo[1,2-a]pyridin-2-yl)sulfonamides and (imidazo[2,1-b]thiazol-6-yl)sulfonamides are not formed. A one-pot two-stage method for the synthesis of target heterocyclic
Regioselective reaction of imidazole-2-thiols with N-sulfonylphenyldichloroacetaldimines: en route to novel sulfonylamino-substituted imidazo[2,1-b]thiazoles and thiazolo[3,2-a]benzimidazoles
The reaction of N-(2,2-dichloro-2-phenylethylidene)arenesulfonamides with 2-mercaptoimidazoles affords N(2-phenylimidazo[2,1-b][1,3]thiazol-3-yl)arenesulfonamides or N-(2-phenyl[1,3]thiazolo[3,2-a]benzimidazol-3yl)arenesulfonamides. Formation of the annulated heterocyclic derivatives is tentatively triggered by a nucleophilic addition of mercaptoimidazole to the activated azomethine group of halogen-containing