The palladium-catalyzed coupling reaction of 3-thiomethyl-1,2,4-triazine 1 with different organoboron compounds in the presence of copper(I) 3-methylsalicylate proceeds to afford the corresponding 3-substituted-1,2,4-triazines in good yield. This approach leads very easily to a large range of C-5 and C-6 unsubstituted as-triazines.
[reaction: see text] Palladium-catalyzedcross-coupling of vinyl- and arylstannanes with pi-electron-deficient heteroaromatics was performed in good yields. This Stille-type reaction was carried out with a methylthioether function as an electrophile in the presence of a copper(I) bromide-dimethyl sulfide complex.
Palladium-catalyzed cross-coupling of 5-acyl and 5-formyl-1,2,4-triazines and their derivatives with heteroaromatic tin compounds
作者:Danuta Branowska、Ewa Olender、Andrzej Rykowski
DOI:10.1016/j.tet.2014.04.094
日期:2014.8
mono- and di(substituted)-1,2,4-triazine derivatives containing thiophene and furan rings are described. Heteroaromatic rings were provided using palladium-catalyzedcross-coupling reaction between 3-alkylsulfanyl-5-acyl-1,2,4-triazines or 5-cyano-3-alkylsulfanyl-1,2,4-triazines and heteroaromatic tin compounds. New compounds bearing masked acyl groups were also obtained. These reactions were optimized
New indicator compounds, method of their preparation and use of those compounds in an iron assay system
申请人:Miles Italiana SpA
公开号:EP0331065A2
公开(公告)日:1989-09-06
The present invention is related to compounds of the general formula (I)
wherein
R¹ denotes hydrogen, halogen or alkyl and
R² denotes optionally substituted alkyl, aryl or hetaryl,
and their preparation. The compounds can be used in an iron assay system.
Heptafluorobutyric Acid Catalyzed Cross-Dehydrogenative Coupling of 7-Aminocoumarins with 1,2,4-Triazines: A Straightforward Pathway to 3-Triazinyl-7-aminocoumarins
作者:Ramil F. Fatykhov、Igor A. Khalymbadzha、Ainur D. Sharapov、Anastasia P. Potapova、Anton N. Tsmokalyuk、Vasiliy S. Gaviko
DOI:10.1055/s-0042-1751570
日期:2024.6
A protocol for C–H/C–H cross-coupling reaction between 7-aminocoumarins and 1,2,4-triazines has been developed. The reaction was carried out under heptafluorobutyric acid catalysis providing products with yield up to 91%. The applicability and scope of the proposed method was demonstrated on 25 compounds containing different substituents both in the triazine ring and at the nitrogen atom of 7-aminocoumarins