31980-12-8Relevant articles and documents
Photochromism of 3H-2,1,4-benzoxadiazine 4-oxides with heterocyclic substituents on the benzene ring
Chugunova,Akylbekov,Samsonov,Sitnov,Burilov
, (2017)
2H-Benzimidazole 1,3-dioxides undergo thermal isomerization to 3H-2,1,4-benzoxadiazine 4-oxides which are converted to 2H-benzimidazole 1-oxides on further heating. Irradiation of 3H-2,1,4-benzoxadiazine 4-oxides with sunlight induces their transformation
Synthesis and some properties of 2H-benzimidazole 1,3-dioxides
Chugunova, Elena,Samsonov, Vladimir,Gerasimova, Tatiana,Rybalova, Tatiana,Bagryanskaya, Irina
, p. 7233 - 7244 (2015)
Abstract The synthesis of novel 2H-benzimidazole 1,3-dioxides on the basis of benzofuroxans interaction with alcohols in acids is described. The formation of a stable secondary carbocation from alcohol is necessary for formation of 2H-benzimidazole 1,3-di
Synthesis of 2H-benzimidazole 1,3-dioxides, separase inhibitors, by reaction of o-benzoquinone dioximes with ketones
Chugunova, Elena,Samsonov, Vladimir,Akylbekov, Nurgali,Mazhukin, Dmitrii
, p. 3986 - 3992 (2017/06/13)
The synthesis of novel 2H-benzimidazole 1,3-dioxides on the basis of o-benzoquinone dioximes interaction with ketones in the presence of acids is described. Nitration of these compounds by nitric acid in acetic acid yields the 5-nitro derivatives of 2H-benzimidazole 1,3-dioxide.
2H-benzimidazole 1,3-dioxide derivatives: A new family of water-soluble anti-trypanosomatid agents
Boiani, Mariana,Boiani, Lucía,Denicola, Ana,Torres De Ortiz, Susana,Serna, Elva,Vera De Bilbao, Ninfa,Sanabria, Luis,Yaluff, Gloria,Nakayama, Héctor,Rojas De Arias, Antonieta,Vega, Celeste,Rolan, Miriam,Gómez-Barrio, Alicia,Cerecetto, Hugo,González, Mercedes
, p. 3215 - 3224 (2007/10/03)
Three series of benzimidazole N-oxide derivatives were developed and were examined for their activity against trypanosomatid parasites (Trypanosoma cruzi and Leishmania spp.). 2H-Benzimidazole 1,3-dioxides displayed remarkable in vitro activities against
FORMATION OF 2H-BENZIMIDAZOLE-1,3-DIOXIDES BY REACTION OF BENZOFUROXANS WITH ALCOHOLS AND ALKYL HALIDES IN THE PRESENCE OF ACIDS
Samsonov, V. A.,Volodarskii, L. B.,Shamirzaeva, O. V.
, p. 460 - 464 (2007/10/02)
Reaction of benzofuroxan and 5-nitrobenzofuroxan with alcohols and alkyl halides in concentrated sulfuric or perchloric acid leads to the formation of 2H-benzimidazole-1,3-dioxides.
Quinoxaline derivatives
-
, (2008/06/13)
The synthesis of quinoxaline and benzimidazole-N-oxides and of ester and amide derivatives of 3-hydroxy-2-quinoxalinecarboxylic acid by a novel process consisting of the reaction between a benzofuroxan and an activated methylene-containing compound under basic conditions.
REACTION OF DERIVATIVES OF 4,7-DIBROMO-2H-BENZIMIDAZOLE N-OXIDES WITH AMINES
Samsonov, V. A.,Volodarskii, L. B.
, p. 569 - 574 (2007/10/02)
The reaction of 4,7-dibromo-2,2-dimethyl-4,5,6,7-tetrahydro-2H-benzimidazole 1,3-dioxide with amines leads to 4,7-diamino-2,2-dimethyl-4,5,6,7-tetrahydro-2H-benzimidazole 1,3-dioxides, which are converted smoothly into 4,7-diamino-2,2-dimethyl-2H-benzimidazoles by the action of silica gel or aluminum oxide.Bromination of 2,2-dimethyl-4,5,6,7-tetrahydro-2H-benzimidazole 1,3-dioxide with an excess of N-bromosuccinimide gave 4,4,7,7-tetrabromo-2,2-dimethyl-4,5,6,7-tetrahydro-2H-benzimidazole 1,3-dioxide, dehydrobromination of which gave 4,7-dibromo-2,2-dimethyl-2H-benzimidazole 1,3-dioxide and 4,7-dibromo-2,2-dimethyl-2H-benzimidazole 1-oxid e.The reaction of these compounds with morpholine led to the formation of products from addition of morpholine at position 5 of the benzimidazole, and both elimination and retention of the N-oxide groups was observed.
PREPARATION AND SOME PROPERTIES OF 2H-IMIDAZOLE 1,3-DIOXIDES, DERIVATIVES OF ALICYCLIC 1,2-DIOXIMES
Samsonov, V. A.,Volodarskii, L. B.
, p. 628 - 633 (2007/10/02)
The corresponding 2H-imidazole 1,3-dioxides were obtained by the reaction of cyclohexanedione and cycloheptanedione 1,2-dioximes with acetone, cyclopentanone, and methyl ethyl ketone.The reactions of these compounds with hydroxylamine hydrochloride, NaBH4, a Grignard reagent, and acetic anhydride in the presence of H2SO4 were studied in the case of 2,2-dimethyl-4,5,6,7-tetrahydro-2H-benzimidazole 1,3-dioxide.Bromination of the latter and 2,2-dimethylcyclohepta-2H-imidazole 1,3-dioxide with N-bromosuccinimide gave the corresponding dibromo derivatives, the bromineatoms in which are replaced by acetoxy and hydroxy groups. 4,7-Dihydroxy-2,2-dimethyl-4,5,6,7-tetrahydro-2H-benzimidazole 1,3-dioxide, which was obtained by oxidation with MnO2, was converted to a quinone, viz., 2,2-dimethyl-4,7-dioxo-4,7-dihydro-2H-benzimidazole 1,3-dioxide.