623156-53-6Relevant academic research and scientific papers
Annulated 1,2,4-triazoles. A convenient synthesis of thieno[2,3-f][1,2,4]triazolo[1,5-a]azepines: A novel triheterocyclic ring system
Wang, Quanrui,Li, Zheng,Yang, Haiyan,Li, Feng,Ding, Zongbiao,Tao, Fenggang
, p. 1231 - 1235 (2003)
A synthetic approach to the previously unknown thieno[2,3-f][1,2,4]triazolo[1,5-a]azepine derivatives was efficiently accomplished by cycloaddition of the bicyclic 1-aza-2-azoniaallene salts 6, derived from 6,7-dihydrobenzo[b]thiophen-4(5H)-one hydrazones 4, to the triple bond of nitriles, followed by ring enlargement. The X-ray crystal diffraction analysis of the picrate 10a provided affirmative proof for the structural assignment made.
