Abstract : [reaction: see text] The pharmacologically important tetracyclic berbane and pentacyclic alloyohimbane structures were prepared efficiently in four steps including a stereoselective 6-exo radical cyclization using xanthates as the radical source.
T. Kaoudi, L.D. Miranda, Samir Zard. An easy entry into berbane and alloyohimbane alkaloids via a 6-exo radical cyclization.. Organic Letters, American Chemical Society, 2001, 3 (20), pp.3125-7. ⟨10.1021/ol016424v⟩. ⟨hal-00954872⟩
