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。