136265-64-0Relevant academic research and scientific papers
SYNTHESIS AND PROPERTIES OF THIAZOLE HALOHYDRAZONES. 2. INTERACTION OF 2-α-CHLOROBENZYLIDENEHYDRAZINO-4-ETHOXY-CARBONYLTHIAZOLE WITH NUCLEOPHILES
Usol'tseva, S. V.,Andronnikova, G. P.
, p. 234 - 237 (1994)
In the interaction of 2-α-chlorobenzylidenehydrazino-4-ethoxycarbonylthiazole with nucleophiles, two competing reactions take place: 1) nucleophilic replacement of the chlorine atom to form the corresponding substitution product; 2) elimination of a hydrogen chloride molecule, concluding in cyclization of the intermediate nitrilimine to form 3-phenyl-5-ethoxycarbonylthiazolo-1,2,4-triazole.The direction taken by the interaction depends on the nature of the nucleophile and is determined primarily by the ratio of basicity and nucleophilicity of the agent.
Acylation and carbamoylation of 2-hydrazinothiazole derivatives. Identification of isomeric structures
Denisova,Bakulev,Dehaen,Toppet,Van Meervelt,Kodess
, p. 584 - 590 (2007/10/03)
Acylation and carbamoylation of 2-(arylmethylidenehydrazino)- and 2-(aroylhydrazino)thiazoles was performed, and structure of the products was established.
SYNTHESIS AND PROPERTIES OF THIAZOLE HALOHYDRAZONES. 1. SYNTHESIS AND INTERACTION OF 2-α-CHLOROBENZYLIDENEHYDRAZINO-4-ETHOXYCARBONYL-THIAZOLE WITH TRIETHYLAMINE IN THE PRESENCE OF DIPOLAROPHILES
Usol'tseva, S. V.,Andronnikova, G. P.
, p. 231 - 233 (2007/10/02)
In the interaction of 2-α-chlorobenzylidenehydrazino-4-ethoxycarbonylthiazole with triethylamine, a nitrilimine is formed as an intermediate that does not react with dipolarophiles, but rather undergoes intramolecular 1,5-dipolar cyclization to form 3-phe
CARBAMOYLATION OF 2-HYDRAZINO-4-ETHOXYCARBONYLTHIAZOLE AND ITS DERIVATIVES
Usol'tseva, S. V.,Denisova, A. B.,Andronnikova, G. P.
, p. 1752 - 1756 (2007/10/02)
The carbamoylation and thiocarbamoylation of 2-hydrazino-4-ethoxycarbonylthiazole and its derivatives were studied.Products of substitution only at the N2 atom of the hydrazino group are formed in the reaction of the hydrazinothiazole with isoc
SYNTHESIS AND SOME REACTIONS OF 4-CARBOXY-2-THIAZOLYLHYDRAZONES
Bredikhina, Z. A.,Buzykin, B. I.,Kitaev, Yu. P.
, p. 427 - 433 (2007/10/02)
The condensation of thiosemicarbazones with bromopyruvic acid gives thiazolylhydrazone hydrobromides, which were converted to the free bases.The question of the site of protonation was studied by PMR spectroscopy.The possibility of self-protonation in 4-carboxythiazolylhydrazone crystals is not excluded.The thiazolylhydrazones are brominated in the 5 position.Both cyclization to thiazolyltriazoles and the Chetteueya-Walker reaction are realized in the case of oxidation with lead tetraacetate.
