A convenient and versatile synthesis of benzo[c]phenanthridine alkaloids, chelerythrine (1) and 12-methoxydihydrochelerythrine (5), was accomplished via an internal aryl-aryl coupling reaction of haloamides 8 and 9 by a palladium-assisted cyclization reaction.
通过
钯辅助环化反应,卤酰胺 8 和 9 发生了内部芳基-芳基偶联反应,从而方便地合成了
苯并[c]菲啶生物碱--螯合红碱(1)和 12-甲氧基二氢螯合红碱(5)。