A concise synthesis of indoloquinoline skeletons applying two consecutive Pd-catalyzed reactions
作者:Borbála Bogányi、Judit Kámán
DOI:10.1016/j.tet.2013.08.019
日期:2013.11
were synthesized in two steps starting from the corresponding bromo-iodoquinolines. Our strategy is based on palladium-catalyzed reactions, applying regioselective Buchwald–Hartwig amination on 2,3- and 3,4-dihaloquinolines followed by an intramolecular Heck-type reaction. Both steps were carried out under microwave irradiation.
所述indoloquinoline生物碱cryptolepine(1),neocryptolepine(2),isocryptolepine(3),和isoneocryptolepine(4)是在传统医学的重要工具。现在,它们的前体1A -图4a中从相应的溴- iodoquinolines开始两步合成的。我们的策略是基于钯催化的反应,在2,3-和3,4- dihaloquinolines随后通过分子内的Heck型反应区域选择性施加的Buchwald-Hartwig氨基化。这两个步骤都是在微波辐射下进行的。