N-Hydroxyethyl-piperidine and -pyrrolidine homoazasugars: preparation and evaluation of glycosidase inhibitory activity
作者:Dilip D Dhavale、Mohammed M Matin、Tarun Sharma、Sushma G Sabharwal
DOI:10.1016/s0968-0896(03)00231-1
日期:2003.7
mycins 4 and 5 and N-hydroxyethyl-pyrrolidine homoazasugars 6 and 7 with full stereocontrol is being reported. The key step involved is the intermolecular Michael addition of benzylamine to D-glucose derived alpha,beta-unsaturated ester 8 followed by N-alkylation with ethyl bromoacetate. Reduction with LAH, acetylation, hydrogenation and protection with -Cbz group afforded compounds 14a and 14b. Removal
报道了在完全立体控制下合成N-羟乙基-1-脱氧-homoojirimrimcincins 4和5以及N-羟乙基-吡咯烷高氮天竺葵6和7的有效和实用的策略。涉及的关键步骤是在D-葡萄糖衍生的α,β-不饱和酯8的分子间Michael加成苄胺,然后用溴乙酸乙酯进行N-烷基化。用LAH还原,乙酰化,氢化和用-Cbz基团保护得到化合物14a和14b。除去1,2-丙酮化物官能团,氢化和脱乙酰基化分别得到N-羟乙基-D-葡萄糖-1-脱氧homonojirimycin(4)和N-羟乙基-L-ido-1-deoxyhomonojirimycin(5)。化合物14a和14b乙酰化后,除去1,2-丙酮化物官能团,偏高碘酸钠氧化,氢化和脱乙酰基得到1,4,5-三甲氧基-1,4-亚氨基-N-羟乙基-D-阿拉伯己糖醇(6)和1,4,5-三甲氧基-1,4-亚氨基-N-羟乙基-L-木糖己糖醇(7),分别。使用甜杏仁种子作