New Synthetic Route to of 1,2,4-Thiadiazolines and 1,3-Thiazolines via Thiadiazolopyridinium Salts
摘要:
A new efficient synthesis of 1,2,4-thiadiazolidines and 1,3-thiazolidines bearing 2-pyridylimino substituents using thiadiazolopyridinium chlorides as intermediates is described. The mechanism probably involves a base promoted nucleophilic addition of thiadiazolopyridinium salts to nitriles and ketones.
Base promoted transformation on thiadiazolopyridinium chlorides
作者:Ana Martinez、Ana Castro、J. P. Fayet
DOI:10.1002/jhet.5570340153
日期:1997.1
1,2,4-Thiadiazolo[2,3-a]pyridinium chlorides undergo a very facile base promoted transformation to give bispyridilimino-1,2,4-thiadiazolidines. The unequivocalstructuralassignment of these last compounds was achieved by spectroscopic 1H, 13C and 15N two dimensional methods.
1,2,4-噻二唑[2,3- a ]吡啶鎓氯化物进行非常容易的碱促进的转化,得到双吡啶并氨基-1,2,4-噻二唑烷。这些最后化合物的明确结构分配是通过1 H,13 C和15 N二维光谱学方法实现的。
A series of arylimino-1,2,4-thiadiazolidines were prepared using an efficient synthesis starting from thiadiazolopyridinium chlorides. All the compounds showed smooth muscular relaxant properties in rat portal veins. The different behaviour under highly depolarized conditions and the reduction of the biological effect by glyburide suggests that the arylimino-1,2,4-thiadiazolidin-3-ones may act, at
New Synthetic Route to of 1,2,4-Thiadiazolines and 1,3-Thiazolines via Thiadiazolopyridinium Salts
作者:Ana Martinez、Ana Castro、Isabel Fonseca、Martin Martinez-Ripoll、Félix H. Cano、Armando Albert
DOI:10.3987/com-96-7593
日期:——
A new efficient synthesis of 1,2,4-thiadiazolidines and 1,3-thiazolidines bearing 2-pyridylimino substituents using thiadiazolopyridinium chlorides as intermediates is described. The mechanism probably involves a base promoted nucleophilic addition of thiadiazolopyridinium salts to nitriles and ketones.