Studies on<i>v</i>-triazoles. Part II. Synthesis of 9-oxo-1<i>H</i>,9<i>H</i>-benzopyrano[2,3-<i>d</i>]-<i>v</i>-triazoles
作者:Derek R. Buckle、D. James Outred、Caroline J. M. Rockell
DOI:10.1002/jhet.5570180612
日期:1981.10
under hydrogenolytic conditions to N-H triazoles 7. Saponification and cyclization with either polyphosphoric acid or phosphoric oxide in methanesulphonic acid leads to the novel 9-oxo-1H,9H-benzopyrano[2,3-d]-v-triazole system 9, members of which have potential as antiasthmatic agents.
1-苄基-5-氯- v -三唑-4-羧酸乙酯(3)经历与容易苯酚离子的卤原子的亲核置换,得到aryloxytriazolecarboxylates 4其中debenzylate氢解的条件下,以NH三唑7。皂化和环化与甲磺酸通向新颖-9-氧代1或者多磷酸或磷酸氧化物ħ,9 ħ -苯并吡喃并[2,3- d ] - v -三唑系统9,其成员有可能作为抗哮喘药。