57735-14-5Relevant academic research and scientific papers
Carbon oxysulphide: A novel reagent for the synthesis of 4-amino/anilino-3-aryl/aryloxymethyl/thiophenoxymethyl-1,2,4-triazolin-5-ones and 5-arylamino-2-mercapto-1,3,4-oxadiazoles
Chande, Madhukar S.,Singh-Jathar, Kiron
, p. 352 - 357 (2007/10/03)
Acid hydrazides 1 on reaction with carbon oxysulphide in the presence of alcoholic KOH afford potassium β-acylthiocarbazinates 2 which on further reaction with hydrazine hydrate or phenylhydrazine give 4-amino-3-substituted-1,2,4-triazolin-5-ones 3 and 4-amilino-3-substituted-1,2,4-triazolin-5-ones 5 respectively. 4-Substituted thiosemicarbazides 6 on treatment with carbon oxysulphide in the presence of ale NaOH afford sodium β-(N-arylthiocarbamyl)thiocarbazinates 7 which on cyclisation in the presence of ethanolic NaOH afford 5-arylamino-2-mercapto-1,3,4-oxadiazoles 8. On reaction with benzyl chloride in the presence of NaOH 8 isomerise to 3-benzylmercapto-4-substituted-1,2,4-triazolin-5-ones 9.
Derives de la dihydro-2,4 triazole-1,2,4 thione-3 et de l'amino-2 thiadiazole-1,3,4 a partir de nouvelles thiosemicarbazones d'esters
Malbec, Frederique,Milcent, Rene,Barbier, Geo
, p. 1689 - 1698 (2007/10/02)
A new general synthesis of 4,5-disubstituted 2,4-dihydro-1,2,3-triazole-3-thiones is proposed.These heterocycles are obtained by the action of primary amines, aralhydrazines or aroylhydrazines on the thiosemicarbazones of esters.These last compounds are prepared by action of chlorhydrates of iminoesters on thiosemicarbazide in dimethylformamide.These thiosemicarbazones react also with strong acids, acid anhydrides and chlorides; by thermolysis and they give 2-amino-1,3,4-thiadiazole derivatives.Also, two derivatives of 1,2,4-triazolo-1,3,4-thiadiazole have been prepared.
