274-83-9Relevant academic research and scientific papers
Metal free [4+1] and [5+1] annulation reactions to prepare heterocycles using DMF and its derivatives as one-carbon source
Liu, Lingfeng,Qiao, Chunhua,Shen, Bei,Xu, Yiwen
supporting information, (2020/04/01)
1,2,4-Triazolo[3,4-a]pyridines and related heterocycles and substituted triazines were commonly discovered scaffolds in a variety of pharmaceutical and agrochemical agents. Herein, we report a highly efficient and practical method using DMF and its derivative for the [4+1] and [5+1] annulation reactions to prepare these heterocycles. This metal free reaction takes advantages of shelf stable DMF as solvent and carbon donor, imidazole chloride as a catalyst, the mild reaction condition tolerates a broad substrate range and substitutes. The prepared 3-unsubstituted 1,2,4-triazolo[3,4-a]pyridine and derivatives allow further introduction of a variety of functional group1 at 3-position.
PROTEIN KINASE INHIBITORS (VARIANTS), USE THEREOF IN TREATING ONCOLOGICAL DISEASES AND A PHARMACEUTICAL COMPOSITION BASED THEREON
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Page/Page column, (2014/07/07)
The present invention relates to the treatment of oncological, chronic inflammatory and similar diseases with the aid of new families of chemical compounds having improved efficiency with regard to the inhibition of Abl kinase and mutant forms thereof, as well as other therapeutically significant kinases. It describes protein kinase inhibitors in the form of compounds of general formula (I) and compounds of general formula (II), or a tautomer, an individual isomer, a mixture of isomers, a pharmaceutically acceptable salt, a solvate or a hydrate thereof.
Synthesis of [1,2,4]triazolo[4,3-b]pyridazine-3-carboxylic acids
Kosary, Judit
, p. 451 - 454 (2007/10/03)
The first synthesis of 6-substituted-[1,2,4]triazolo[4,3-b]pyridazine-3-carboxylic acids 2a-c was carried out by an enzymatic hydrolysis of alkyl 6-substituted-[1,2,4]triazolo[4,3-b]pyridazine-3-carboxylates 1 by α-chymotrypsin (EC 3.4.21.1) immobilized on a polyacrylamide-type bead support (ACRYLEX C-100). Earlier the synthesis of these compounds failed owing to ready decarboxylation of the products. During enzymatic hydrolysis decarboxylation was only a side reaction.
