720684-45-7Relevant academic research and scientific papers
Synthesis of 2-oxo-[1,2,4]triazolo[3,2-d] [1,5]benzoxazepines: A kind of novel tricyclic O,N-heterocycles
Li, Zheng,Wang, Quanrui,Tao, Fenggang
, p. 1691 - 1702 (2007/10/03)
The synthesis of a series of novel tricyclic O,N-heterocycles 7a-k, a kind of unprecedented 2-oxo-[1,2,4]triazolo[3,2-d][1,5]benzoxazepine derivatives, has been accomplished, featuring acid-induced ring closure of the geminal arylazo isocyanato compounds 5, which were prepared from chroman-4-ones in three steps, followed by feasible ring expansion and basic work-up.
