65373-29-7Relevant academic research and scientific papers
Versatile strategies for the solid phase synthesis of small heterocyclic scaffolds: [1,3,4]-Thiadiazoles and [1,3,4]-oxadiazoles
Severinsen, Rune,Kilburn, John Paul,Lau, Jesper F.
, p. 5565 - 5575 (2007/10/03)
New robust protocols for the solid phase synthesis of 5-alkylthio-, 5-alkyl/aryl-, and 5-acylamino-2-alkylamino-[1,3,4]-thiadiazoles are described based on a common resin bound thiosemicarbazide. A protocol for the solid phase synthesis of 2-alkyl/aryl-amino-5-alkylamino-[1,3,4]-oxadiazoles from a resin bound semicarbazide is likewise reported. The protocols have been verified by the preparation of four small libraries that all gave products in good to excellent yields and purity.
Oxidation and Eliminative Cyclisation of S-Alkylisodithiobiureas
Indukumari, P. V.,Joshua, C. P.,Rajan, V. P.
, p. 384 - 387 (2007/10/02)
Isothiocyanates condense with S-alkylisothiosemicarbazides to yield S-alkylisodithiobiureas.These undergo cyclisation to give 3-amino-5-mercapto-4-substituted-1,2,4-triazoles with the elimination of alkyl mercaptan on heating under neutral conditions, whereas under acidic conditions, by elimination of ammonia 5-alkylmercapto-2-substituted amino-1,3,4-thiadiazoles are formed.Condensation of isothiocyanates with thiosemicarbazides in the presence of alkali affords 1-substituted dithiobiureas.Alkylation of these dithiobiureas with alkyl halides results in the formation of 5-alkylmercapto-2-substituted-amino-1,3,4-thiadiazoles, any intermediateproduct not being isolable.On the other hand, oxidation of 1-substituted dithiobiureas with either hydrogen peroxide or iodine furnishes 2-amino-5-substituted-amino-1,3,4-thiadiazoles.
Combating weeds in soybeans
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, (2008/06/13)
Weeds are selectively controlled in soybean fields by post-emergent application of a compound having the structural formula STR1 in which X represents bromo, fluoro, cyano or trifluoromethyl and R is hydrogen or methyl.
