Synthesis of 5<i>H</i>-1,2,3-triazolo[4,3-<i>a</i>][2]benzazepines from the baylis-hillman adducts of 2-alkynylbenzaldehydes
作者:Seung Ho Ko、Kee-Jung Lee
DOI:10.1002/jhet.5570410422
日期:2004.7
The facile synthesis of 5H-1,2,3-triazolo[4,3-a][2]benzazepines 5a-d by the intramolecular 1,3-dipolar cycloaddition reaction of 2-alkynylphenylallyl azides 4a-d is described. The latter were readily obtained from 2-alkynylbenzaldehydes 1a-d through the Baylis-Hillman adducts 2a-d followed by acetylation to compounds 3a-d and nucleophilic substitution by azide to compounds 4a-d.
描述了通过2-炔基苯基烯丙基叠氮化物4a-d的分子内1,3-偶极环加成反应容易地合成5 H -1,2,3-三唑并[4,3- a ] [2]苯并ze庚因5a-d。后者很容易从2-炔基苯甲醛1a-d通过Baylis-Hillman加合物2a-d获得,然后乙酰化为化合物3a-d,并用叠氮化物亲核取代为化合物4a-d。