Enantioselective modification of the Pomeranz-Fritsch-Bobbitt synthesis oftetrahydroisoquinoline alkaloids: synthesis of (-)-salsolidine and (-)-carnegine
A. Gluszynska et Md. Rozwadowska, Enantioselective modification of the Pomeranz-Fritsch-Bobbitt synthesis oftetrahydroisoquinoline alkaloids: synthesis of (-)-salsolidine and (-)-carnegine, TETRAHEDR-A, 11(11), 2000, pp. 2359-2366
(-)-Salsolidine 7 and (-)-carnegine 8 were prepared in 46 and 36% e.e., res
pectively, by enantioselective addition of methyllithium to the Pomeranz-Fr
itsch imine 13 in the presence of ligands 9 12, followed by acid-catalyzed
cyclization and hydrogenolysis. (C) 2000 Elsevier Science Ltd, All rights r
eserved.