Organoaluminium induced ring-opening of epoxypyranosides. IV. Synthesis and structure of γ- hydroxy-lsoleucine stereoisomers and their corresponding lactones.
作者:Tord Inghardt、Torbjörn Frejd、Göran Svensson
DOI:10.1016/s0040-4020(01)86574-1
日期:1991.8
Two gamma- hydroxy-isoleucine stereoisomers 8 (2R, 3R, 4R), and 14 (2S, 3R, 4R) as well as their corresponding gamma- 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-butyldimethylsilyl)-beta-L-ribopyranoside (1). The structure of the lactone hydrochloride 9 was confirmed by an X-ray crystal structure determination.