Studies of Zoanthamine Alkaloids. Enantiocontrolled Construction of the Tetracyclic Hemi-Aminal Core

D. R. Williams and G. S. Cortez, Studies of Zoanthamine Alkaloids.  Enantiocontrolled Construction of the Tetracyclic Hemi-Aminal Core, Tetrahedron Lett. 1998, 39, 2675–2678.