Expeditious Synthesis of Tri- and Tetrahydroxyazepanes from <scp>d</scp>-(−)-Quinic Acid as Potent Glycosidase Inhibitors
作者:Tzenge-Lien Shih、Ru-Ying Yang、Shiou-Ting Li、Cheng-Fan Chiang、Chun-Hung Lin
DOI:10.1021/jo070058x
日期:2007.5.1
Several new stereoisomers of 3,4,6-trihydroxyazepanes and 7-hydroxymethyl-3,4,5-trihydroxyazepanes as well as known 3,4,5-trihydroxyazepanes were synthesized as potent glycosidase inhibitors from d-(−)-quinic acid in an efficient manner. The key step employs dihydroxylation of protected chiral 1,4,5-cyclohex-2-enetriols under RuCl3/NaIO4/phosphate buffer (pH 7) condition, followed by reductive amino cyclization