Synthesis of potentially photoactivatable coumarin derivatives<i>via</i>a 1,3-dipolar cycloaddition
作者:Elodie-Denise Chenot、Juan Carlos Rodríguez-Domínguez、Alain Comel、Gilbert Kirsch、Paul Hannewald
DOI:10.1002/jhet.5570450528
日期:2008.9
(1)-catalyzed 1,3-dipolar cycloaddition reaction was used to prepare a series of mono and disubstituted 1,2,3-triazolyl-coumarins using a 1,3-cycloaddition (“Click Chemistry”). Starting coumarins were synthesized using classical or modified Pechmann's reaction. The propargyl group was introduced as either propargylether or as a propargylamide. Azides were prepared in a three steps procedure. Cycloaddition products
铜(1)催化的1,3-偶极环加成反应被用于使用1,3-环加成反应制备一系列单和双取代的1,2,3-三唑基-香豆素(“点击化学”)。起始香豆素是使用经典或改良的Pechmann反应合成的。炔丙基作为炔丙基醚或炔丙基酰胺被引入。叠氮化物按三步法制备。以高收率获得了包含香豆素和可光活化部分的环加成产物。