- Selective exploitation of acetoacetate carbonyl groups using imidazolium based ionic liquids: synthesis of 3-oxo-amides and substituted benzimidazoles
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An unprecedented Br?nsted base ionic liquid tuned selective aminolysis of ester carbonyl of acetoacetates is demonstrated to achieve acetoacetamide derivatives. Other imidazolium ionic liquid performs an efficient cyclization catalysis involving acetoacetate-carbonyl groups and o-phenylenediamine at elevated temperature to produce benzimidazoles via C–C bond cleavage of intermediate 1,5-benzodiazepinones under solvent-free conditions.
- Chakraborty, Ankita,Majumdar, Swapan,Maiti, Dilip K.
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p. 3298 - 3302
(2016/07/11)
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- Reaction of 3-Hydrazino-5,6-diphenyl-1,2,4-triazine with Unsymmetrical 1,3-Bicarbonyl Compounds : Synthesis of Some New 3-(3',5'-Disubstituted pyrazol-1'-yl)-5,6-diphenyl-1,2,4-triazines and Their Antimicrobial Activity
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The reactions of 3-hydrazino-5,6-diphenyl-1,2,4-triazine (I) with unsymmetrical 1,3-bicarbonyl compounds such as α-cyanoacetophenone, benzoylacetanilide, anilino-α,β-unsaturated ketone, benzoylacetic acid hydrazide, N1-cyanoacetyl-N2-benzoylacetylhydrazine, N1-benzene-N2-benzoyl-acetylhydrazine, 1,1,1-trifluoroacetylacetone, 1,1,1,5,5,5-hexafluoropenta-2,4-dione and 1-benzoylacetone-2-oxime, have been studied in abs. ethanol, gl. acetic acid and ethanol-piperidine media.These reactions result in some new 3-(3',5'-disubstituted pyrazol-1'-yl)-5,6-diphenyl-1,2,4-triazines.Some of these compounds show moderate antimicrobial activity.
- Abdel-Rahman, R. M.
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p. 548 - 553
(2007/10/02)
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