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BIBTEX RIS

Isolamento e caracterização de acil-tiossemicarbazidas como intermediários na síntese de compostos mesoiônicos

1998; Brazilian Chemical Society; Volume: 21; Issue: 5 Linguagem: Inglês

10.1590/s0100-40421998000500007

ISSN

1678-7064

Autores

Maria Aparecida Medeiros Maciel, Aurea Echevarrı́a, Víctor Marcos Rumjanek,

Tópico(s)

Synthesis and Reactivity of Sulfur-Containing Compounds

Resumo

ISOLATION AND CHARACTERIZATION OF ACYL-THIOSEMICARBAZIDES AS INTERME-DIATES IN MESOIONIC COMPOUNDS SYNTHESIS.1,3,4-thiadiazolium-2-aminides and their isomers 1,3,4-triazolium-2-thiolates have been synthesized via anhydroacylation reactions.This work presents a study by infrared monitoring of the reaction between substituted aroyl acid chlorides and 1,4-diphenylthiosemcarbazide.The intermediates and products were isolated, purified and charaterized by IR and 13 C NMR spectroscopy.The increasing or decreasing in intensity of characteristic stretching bands indicated the rate dependence on the electronic nature of substituents.The results also demonstrate that 1,3,4-triazolium-2-thiolates are obtained in anhydrous conditions whereas presence of water leads to a mixture of the isomers.

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