substituted benzaldehydes with alkyne–amines by a Rh‐catalyzed C−H activation and annulation to afford various natural and unnatural protoberberine alkaloids is reported. This reaction provides a convenient route for the generation of a compound library of protoberberine salts, which recently have attracted great attention because of their diverse biological activities. In addition, pyridinium salt derivatives
据报道,通过Rh催化的CH活化和环化反应,将取代的
苯甲醛与
炔烃胺进行一锅反应,从而得到各种天然和非天然的小ber碱
生物碱。该反应为生成原小ber碱盐的化合物文库提供了便利的途径,近来由于其多样的
生物活性而引起了极大的关注。此外,
吡啶鎓盐衍
生物也可以由α,β-不饱和醛和
氨基
炔烃以高收率形成。通过使用O 2作为氧化剂,该反应在温和的反应条件下以优异的区域选择性和良好的官能团相容性进行。