Concise synthesis of the CDE ring system of tetrahydroisoquinoline alkaloids using carbophilic Lewis acid-catalyzed hydroamidation and oxidative Friedel-Crafts cyclization
The Journal of Organic Chemistry (2008) - Comment
pubmed: 18529080  doi: 10.1021/jo800898k  issn: 1520-6904  issn: 0022-3263 

Shingo Obika, Yoshizumi Yasui, Reiko Yanada, Yoshiji Takemoto