Synthesis of Tetrahydropyridoimidazole-2-acetates: Effect of Carboxy and Methoxycarbonyl Groups at C(2) on the Inhibition of Some?- and?-Glycosidases
作者:Miroslav Terinek、Andrea Vasella
DOI:10.1002/hlca.200490273
日期:2004.12
and -acetic acids 16 and 17, and 20 and 21, respectively, were synthesized by condensation, in the presence of HgCl2, of the known thionolactam 26 with the β-amino ester 25 that was obtained by addition of AcOMe to the imine 22, followed by debenzylation. The resulting methyl esters 16 and 20 were hydrolyzed to the acetic acids 17 and 21. The (methoxycarbonyl)-imidazole 14 and the acid 15 were obtained
的葡糖-和甘露-tetrahydropyridoimidazole -2-乙酸酯和-乙酸16和17,以及20和21,分别通过缩合合成,在氯化汞的存在下2,已知thionolactam的26与β -氨基酯25通过向亚胺22中添加AcOMe ,然后进行脱苄基反应获得该产物。将得到的甲酯16和20水解成乙酸17和21。(甲氧羰基)咪唑14通过已知的醛29获得酸15和酸15。咪唑14 - 17日,20,和21测试了作为的抑制剂β从葡糖苷酶Caldocellum糖热厌氧杆菌的α从啤酒酵母中,葡糖苷酶β从蜗牛甘露糖苷酶和α从甘露糖苷酶杰克豆(表1- 3)。K i值对葡萄糖和甘露糖中的C(2)-取代基的性质具有类似的依赖性-系列。除19外,甘露糖咪唑是比葡萄糖类似物更弱的抑制剂。乙酸甲酯16和20比丙酸甲酯5和11弱3-4倍,这与疏水作用一致。的葡萄糖-配置(甲氧羰基) -咪唑14比乙酸甲酯弱20倍16