Annelation of the thiazole ring to 1,2,4-triazines by tandem AN—ANor SNH—SNHreactions
摘要:
The reactions of 3-aryl-1,2,4-triazines with aromatic thioamides and 4-arylthiosemicarbazides in acetic anhydride at room temperature afforded cyclic products of the tandem nucleophilic addition reactions, viz., tetrahydrothiazolo[4,5-e]-annelated 1,2,4-triazines, in good yields. The latter underwent aromatization in the presence of potassium permanganate.
作者:Mikhail M. Krayushkin、Vladimir N. Yarovenko、Igor P. Sedishev、Anatoly A. Andreiko、Nataliya N. Mochulskaya、Valery N. Charushin
DOI:10.1070/mc2005v015n04abeh002142
日期:——
The interaction of thiazolo[4,5-e][1,2,4]triazines with bicyclo[2.2.1]heptadiene at a high pressure (up to 15 kbar) results in the corresponding thiazolo[4,5-b]pyridines, and this is the key step of a new approach to fused pyridines based on the tandem S-N(H)-S-N(H) reactions on the 1,2,4-triazine ring.
Annelation of the thiazole ring to 1,2,4-triazines by tandem A<sub>N</sub>—A<sub>N</sub>or S<sub>N</sub><sup>H</sup>—S<sub>N</sub><sup>H</sup>reactions
作者:N. N. Mochul"skaya、A. A. Andreiko、M. I. Kodess、E. B. Vasil"eva、V. I. Filyakova、A. T. Gubaidullin、I. A. Litvinov、O. G. Sinyashin、G. G. Aleksandrov、V. N. Charushin
DOI:10.1023/b:rucb.0000042287.32992.54
日期:2004.6
The reactions of 3-aryl-1,2,4-triazines with aromatic thioamides and 4-arylthiosemicarbazides in acetic anhydride at room temperature afforded cyclic products of the tandem nucleophilic addition reactions, viz., tetrahydrothiazolo[4,5-e]-annelated 1,2,4-triazines, in good yields. The latter underwent aromatization in the presence of potassium permanganate.