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. Author manuscript; available in PMC: 2008 Aug 6.
Published in final edited form as: Nat Prod Rep. 2008 Apr 14;25(4):719–737. doi: 10.1039/b706296f

Scheme 7.

Scheme 7

Panek and Porco’s folding pathway using functionalised tetrahydropyridines. Reagents and conditions: (1) AIBN, Bu3SnH, 80 °C, 4 h, benzene, 22a: 65%; 22b: 89%; 22c: 81%.