Synthesis of 2‐Oxo‐[1,2,4]triazolo[3,2‐d][1,5]benzoxazepines: A Kind of Novel Tricyclic O,N‐Heterocycles
作者:Zheng Li、Quanrui Wang、Fenggang Tao
DOI:10.1081/scc-120030757
日期:2004.12.31
Abstract 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.
摘要 合成了一系列新型三环 O,N-杂环 7a-k,一种前所未有的 2-氧代-[1,2,4]三唑并[3,2-d][1,5]苯并氧氮杂衍生物,具有已经完成,以酸诱导的双芳基异氰酸根合化合物 5 闭环为特征,该化合物 5 是由色满 - 4-酮分三步制备的,然后是可行的扩环和基础处理。