2002 alkaloids

alkaloidsU 0600

12 - 240Stereoselective Synthesis of Tricyclic Guanidine Systems: Confirma-tion of the Stereochemistry of Batzelladine F Left-Hand TricyclicGuanidine Portion. — The anti- and syn-fused tricyclic guanidines (IX)and (XIII) are synthesized from the common intermediate (IV) by similarsequences. A three-step inversion of the hydroxyl group in (IV) produces (X),which is further converted into (XIII) as described for (IX). — (NAGASAWA,KAZUO; KOSHINO, HIROYUKI; NAKATA, TADASHI; Tetrahedron Lett. 42(2001) 25, 4155-4158; Inst. Phys. Chem. Res., RIKEN, Wako, Saitama 351-01,Japan; EN)

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