Search Results - "Cusmano, Giuseppe"
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A study of the behaviour of 2,4-substituted thiosemicarbazides toward orthoesters: Formation of mesoionic compounds
Published in Journal of heterocyclic chemistry (01-09-1997)“…The reactions beetwen 2,4‐disubstituted thiosemicarbazides and orthoesters in refluxing xylene led to the formation of the 1,2,4‐triazoline‐5‐thione ring and…”
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Substituent effect on oxidative cyclization of aldehyde thiosemicarbazones with ferric chloride
Published in Journal of heterocyclic chemistry (01-08-1991)“…The reactivity of aldehyde thiosemicarbazones 1 with ferric chloride solutions was examined. When compounds 1 are not substituted on the N‐2 nitrogen atom…”
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Rearrangement of 3-(N-heteroarylamino)-1,2,5-oxadiazoles: triazolo [1,5-a] quinolines and triazolo [1,5-a] pyridines
Published in Heterocycles (01-07-1993)Get full text
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Oxidative cyclization of some aldehyde semicarbazones induced by metallic salts
Published in Journal of heterocyclic chemistry (01-05-1993)“…The oxidative cyclization of some aldehyde semicarbazones 10 with four different oxidizing agents has been effected. The structure of the semicarbazones and…”
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Heterocyclic photorearrangements. Photoinduced rearrangement of 3-styryl-1,2,4-oxadiazoles
Published in Journal of heterocyclic chemistry (01-05-1990)“…The photochemical behaviour of 3‐styryl‐5‐phenyl‐(5‐methyl)‐1,2,4‐oxadiazoles in methanol at 254 nm has been investigated. A photoinduced rearrangement to the…”
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Rearrangements of arylhydrazones of N-acylbenzimidazoles ― synthesis of 2-aryl-1,2,4-triazolo[4,3-a]quinoxalinium salts
Published in Heterocycles (01-02-1989)Get full text
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Photochemical cyclization of some aldehyde thiosemicarbazones
Published in Journal of heterocyclic chemistry (01-01-1992)“…The photochemical behaviour of some substituted aldehyde thiosemicarbazones 1a‐k has been investigated in methanol at 254 nm. Thiosemicarbazones of glyoxil…”
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Addition reactions of heterocycles. VI. Reactions of 1,2-dimethylpyrrole and 1-methyl-2-carbomethoxypyrrole with nitrilimines
Published in Journal of heterocyclic chemistry (01-03-1978)“…Addition reactions of 1,2‐dimethylpyrrole and 1‐methyl‐2‐carbomethoxypyrrole with C‐acetyl‐N‐phenylnitrilimine, have been investigated. 1,2‐Dimethylpyrrole…”
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11
Cyclization reactions of arylhydrazone adducts - synthesis of 1-aryl-1H-1,2,4-triazolo[4,3-b]indazoles
Published in Heterocycles (01-11-1989)Get full text
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On the configuration and the conformation of 2-acylindazole arylhydrazones
Published in Heterocycles (01-05-1987)Get full text
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Synthesis of 2H-pyrazolo[3,4-c]quinoline derivatives by one pot rearrangement of phenylhydrazones of 3-acylindoles
Published in Heterocycles (01-11-1986)Get full text
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Mononuclear heterocyclic rearrangements. Part 12. Rearrangement of 1,2,4-oxadiazoles into indazoles
Published in Journal of heterocyclic chemistry (01-06-1979)“…The first example of a mononuclear heterocyclic rearrangement involving an XYZ = CCN side‐chain sequence is reported. The 3‐(o‐aminophenyl)‐, and…”
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Mononuclear isoheterocyclic rearrangements. Note I. Interconversion of 3-benzoylamino-5-methyl-1,2,4-oxadiazole and 3-acetylamino-5-phenyl-1,2,4-oxadiazole
Published in Journal of heterocyclic chemistry (01-10-1975)“…The first example of mononuclear isoheterocyclic rearrangement is reported. The 3‐benzoylamino‐5‐methyl‐1,2,4‐oxadiazole (5) furnishes through a reversible…”
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Methylation of 2-phenylamino-1,3,4-thiadiazole. A structure debated
Published in Journal of heterocyclic chemistry (01-03-1987)“…The true identity of the 4‐methyl‐5‐phenylimino‐δ2‐1,3,4‐thiadiazoline (A) has been demonstrated. The reactions, previously reported in the literature to give…”
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Heterocyclic rearrangements. Rearrangements of 1,2,4-oxadiazoles, isoxazoles, and 1,2,5-oxadiazoles involving a carbethoxythiourea NCS sequence
Published in Heterocycles (01-12-1986)Get full text
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Mononuclear heterocyclic rearrangement. Note I. Kinetic study of the rearrangement of the phenylhydrazone of 3-benzoyl-5-phenyl-1,2,4-oxadiazole into 2,5-diphenyl-4-benzoylamino-1,2,3-triazole
Published in Journal of heterocyclic chemistry (01-04-1976)“…The rates of the mononuclear heterocyclic rearrangement of the phenylhydrazone of 3‐benzoyl‐5‐phenyl‐1,2,4‐oxadiazole (1) into…”
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Polycondensed nitrogen heterocycles. Part 21 . Complete 13 C NMR assignment of annelated phenanthridines
Published in Journal of heterocyclic chemistry (01-09-1986)“…Two‐dimensional nmr techniques were used for the complete assignment of 13 C nmr spectra of pyrrolo‐[1,2‐ f ]‐, pyrazolo[1,5‐ f ]‐, and 1,2,4‐triazolo[1,5‐ f…”
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Polycondensed nitrogen heterocycles. Part 21. Complete 13C NMR assignment of annelated phenanthridines
Published in Journal of heterocyclic chemistry (01-09-1986)“…Two‐dimensional nmr techniques were used for the complete assignment of 13C nmr spectra of pyrrolo‐[1,2‐f]‐, pyrazolo[1,5‐f]‐, and…”
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