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
Highly stereoselective and stereospecific syntheses of a variety of quercitols from d-(−)-quinic acid
作者:Tzenge-Lien Shih、Ya-Ling Lin、Wei-Shen Kuo
DOI:10.1016/j.tet.2004.11.084
日期:2005.2
The highly stereoselective synthesis of (−)-epi-, (−)-allo- and neo-quercitols as well as stereospecific synthesis of (−)-talo- and (+)-gala-quercitols have been achieved. The general strategy is employing dihydroxylation of the isolated double bond of various kinds of protected chiral (1,4,5)-cyclohex-2-ene-triols, which are derived from d-(−)-quinic acid. The choosing of protecting groups from either