- Some chemical properties of 2,3-dihydro-4H-[1,3]thiazino[3,2-a] benzimidazol-4-one and 2-aryl-2,3-dihydro-4H-[1,3]thiazino[3,2-a]benzimidazol-4- ones
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We have studied the reaction of 2,3-dihydro-4H-[1,3]thiazino[3,2-a] benzimidazol-4-one and 2-aryl-2,3-dihydro-4H-[1,3]thiazino[3,2-a]benzimidazol-4- ones with amines, alkylating reagents, and hydrogen peroxide. We have shown that the presence of an aryl substituent at the 2 position of [1,3-thiazino[3,2-a] benzimidazol-4-ones has a substantial effect on the direction of the reactions. 2006 Springer Science+Business Media, Inc.
- Britsun,Esipenko,Lozinskii
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p. 396 - 402
(2008/02/04)
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- Synthesis and transformations of 5-substituted 2-aryl-7H-[1,2,4]triazolo[3, 2-b][1,3]thiazin-7-ones and 2-aryl-2,3-dihydro-4H-[1,3]thiazino[3,2-a] benzimidazol-4-ones
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3-Aryl-1,2,4-triazole-5-thiones react with dimethyl acetylenedicarboxylate and methyl 3-phenyl-propynoate to afford the corresponding 5-substituted 2-aryl-7H-[1,2,4]triazolo[3,2-b][1,3]thiazin-7-ones. Treatment of 2-aryl-2,3-dihydro-4H-[1,3]thiazino[3,2-a]benzimidazol-4-ones with alkalies leads to formation of 3-(benzimidazol-2-ylsulfanyl)-3-arylpropionic acids, their reaction with methyl p-toluenesulfonate yields 1-(3-methyl-2-thioxo-2,3- dihydro-1N-benzimidazol-1-yl)-3-phenyl-2-propen-1-one, and oxidation with hydrogen peroxide gives benzimidazole-2-sulfonic acid and 3-aryl-2-propenoic acids. 2005 Pleiades Publishing, Inc.
- Britsun,Esipenko,Chernega,Lozinskii
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p. 108 - 113
(2007/10/03)
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- Synthesis of derivatives of 1-amino-benzimidazoline-2-thione
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A new method for producing 1-aminobenzimidazoline-2-thione by the reaction of 1-amino-2-chloro-benzimidazole or 1-aminobenzimidazole-2-sulfonic acid with sodium hydrosulfide is proposed. The pathways of synthesis of N-acylamino-2-methylthiobenzimidazoles
- Brukshtus,Sirvidite
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p. 189 - 193
(2007/10/03)
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- Facile desulfurization of cyclic thioureas by hydrogen peroxide in acetic acid.
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A simple, mild and synthetically useful method for the desulfurization of cyclic thioureas and related compounds, existing as thiol-thione tautomeric mixtures, by hydrogen peroxide in acetic acid is proposed. The effect of substituting different solvents for the acetic acid was investigated.
- Grivas,Ronne
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p. 225 - 229
(2007/10/02)
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- Novel Desulphurization of Thiourea Derivatives by Alkaline Autoxidation
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Autoxidation of 1,3-disubstituted thioureas in the presence of oxygen and tertiary butoxide in tertiary butanol afforded the corresponding ureas in good yields together with small amounts of the corresponding guanidines while the same treatment of benz- or naphth-imidazole-2-thiones gave the parent imidazoles and the 2-sulphonic acids.
- Kim, Yong Hae,Kim, Hyung Jin,Yon, Gyu Hwan
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p. 1064 - 1065
(2007/10/02)
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