Synthesis and Glycosidase Inhibitory Studies of Pentahydroxyindolizidines:D-Glucose-Derived Aziridine-2-carboxylate Approach
作者:K. S. Ajish Kumar、Vinod D. Chaudhari、Vedavati. G. Puranik、Dilip D. Dhavale
DOI:10.1002/ejoc.200700461
日期:2007.10
N-Cbz protection, afforded two diastereomeric pyrrolidines 11a and 11b with sugar appendages. Removal of the 1,2-acetonide functionality in 11a/11b and reductive amination gave the pentahydroxyindolizidine alkaloids 6g and 6h, respectively, with (S) absolute configurations at the ring junctions. The glycosidase inhibitory activities of these compounds were studied. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451
D-葡萄糖衍生的氮丙啶-2-羧酸酯 1 转化为 α-氨基醛 7,经过 Wittig 烯化、不对称二羟基化、氢化、LiAlH4 还原和 N-Cbz 保护后,得到两个非对映异构吡咯烷 11a 和 11b 和糖附属物. 去除 11a/11b 中的 1,2-丙酮化物官能团和还原胺化分别得到五羟基吲哚里西啶生物碱 6g 和 6h,在环连接处具有 (S) 绝对构型。研究了这些化合物的糖苷酶抑制活性。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)