An efficient synthesis of quinolizinium salts from 2-vinylpyridines and alkynes via Rh(III) or Ru(II)-catalyzed CâH activation and annulation reaction is described. A possible mechanism involving pyridine assisted vinylic ortho-CâH activation, alkyne insertion and reductive elimination is proposed.
介绍了一种通过 Rh(III) 或 Ru(II) 催化的 CâH 活化和环化反应,从
2-乙烯基吡啶和
炔烃中高效合成喹嗪盐的方法。提出了一种可能的机制,包括
吡啶辅助
乙烯基正交 CâH 活化、
炔烃插入和还原消除。