Organoaluminium induced ring-opening of epoxypyranosides. IV. Synthesis and structure of γ-hydroxy-lsoleucine stereoisomers and their corresponding lactones.
Two γ-hydroxy-isoleucine stereoisomers 8 (2R, 3R, 4R), and 14 (2S, 3R, 4R) as well as their corresponding γ-lactones 9 and 15 were synthesized using a tandem. Me3Al induced opening of the epoxide and pyranoside rings of benzyl 2, 3-anhydro-4-O-(tert- ...