Microwave-assisted Solvent-free Synthesis of 3-alkyl-6-aryl[1,2,4] triazolo[3,4-b][1,3,4]thiadiazines
作者:Xin-Ping Hui、Ren-Lin Wang、Zi-Yi Zhang
DOI:10.3184/030823407x198203
日期:2007.2
An efficient microwave-assisted solvent-free synthesis of 3-alkyl-6-aryl[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine derivatives is reported. Twelve derivatives have been synthesised in excellent yields in short reaction times.
Structure of 4-amino-3-butyl-1,2,4-triazole-5-thione: Relation to derivatives with H, Me, Et, and Pr in the 3-position
作者:La Keya A. Belcher、Philip J. Squattrito
DOI:10.1007/s10870-005-9043-7
日期:2006.3
The compound 4-amino-3-butyl-1,2,4-triazole-5-thione [crystal data: C6H12N4S, triclinic, P $$ \bar 1$$ , Z = 2, a = 7.546(2), b = 11.217(3), c = 5.681(1) Å, α = 103.12(2), β = 91.33(2), γ = 72.41(2)°, V = 445.9(2) Å3] contains an essentially planar triazole ring with the butyl group rotated out of the plane by approximately 104°. The molecules form hydrogen-bonded dimers through intermolecular N–H $$ \cdots $$ S interactions involving the thione sulfur atom and the protonated nitrogen atom on the ring. These units are then linked into columns through N–H $$ \cdots $$ N hydrogen bonds between the amine group and the unsubstituted ring N atom of adjacent molecules. The structural features of this compound are compared with those of the corresponding triazoles with H, methyl, ethyl and propyl groups on the 3-carbon.
Synthesis of 3-(3-Alkyl-5-thioxo-1H-4,5-dihydro-1,2,4-triazol-4-yl)aminocarbonylchromones
作者:Linghua Cao、Lin Zhang、Pengyuan Cui
DOI:10.1023/b:cohc.0000037320.27881.27
日期:2004.5
Synthesis of 3-Alkyl-6-aryl(arylamino)-7<i>H</i>-[1,2,4]triazolo- [3,4-b][1,3,4]thiadiazines
作者:A. M. Demchenko、V. A. Yanchenko、M. O. Lozinskii
DOI:10.1023/b:rujo.0000003197.78674.d6
日期:2003.7
Starting from 5-alkyl-4-amino-4H-1,2,4-triazole-3-thiols and substituted chloroacetanilides, the corresponding (5-alkyl-4-amino-4H-1,2,4-triazol-3-ylsulfanyl)acetanilides were synthesized. The products underwent intramolecular cyclization in boiling phosphoryl chloride to afford 3-alkyl-6-arylamino-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines. 3-Alkyl-6-aryl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine hydrobromides were obtained by reaction of 5-alkyl-4-amino-4H-1,2,4-triazole-3-thiols with substituted phenacyl bromides.
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