## Abstract Various [5,6]pyrano[2,3β__c__]pyrazolβ4(1__H__)βthiones were synthesized in high yields by treatment of the corresponding [5,6]pyrano[2,3β__c__]pyrazolβ4(1__H__)βones with Lawesson's reagent. Detailed NMR spectroscopic studies were undertaken of the title compounds. Complete and unambig
Definition of the predominant tautomeric form of 3-methyl-1-phenylpyrazoline-5-thione in solution by 1 H and 1 3C NMR spectroscopy
β Scribed by Joseph John Bergman; Brian Maurice Lynch
- Book ID
- 112123133
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1974
- Tongue
- English
- Weight
- 207 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0022-152X
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π SIMILAR VOLUMES
## Dedicated to Professor G. Smets on the occasion of his 75th birthday The title compounds have been analyzed by 13C NMR spectroscopy and compared with the N-3 methyl and O/S alkyl derivatives. The mesoionic structures 2a,b are rejected in favour of la,b on the basis of the 2Jc5 = CH coupling con
Novel 6-aryl-3-[5-methyl-1-(4-methylphenyl)-1,2,3-triazol-4-yl]-s-triazolo[3,4-b]-1,3,4-thiadiazoles were synthesized by the condensation of 3-[5-methyl-1-(4-methylphenyl)-1,2,3-triazol-4-yl]-4amino-5-mercapto-s-triazole with various aromatic carboxylic acids in the presence of phosphorus oxychlorid
## Abstract Carbonβ13 NMR study of 4(5)βvinylβ1,2,3βtriazole in dimethylformamide at β55Β°C allows direct observation of the three separate tautomers. The ^13^C chemical shift values of the three forms, as well as their percentages in the tautomeric mixture, are given.