Synthesis and Evaluation of Indolizine-Type Inhibitors ofN-acetyl-?-D-glucosaminidases
作者:Narendra Panday、Thierry Granier、Andrea Vasella
DOI:10.1002/hlca.19980810303
日期:——
deprotected acetamido- and trifluoroacetamido-pyrroles 18, 19, 22, 27, 28, 34, 3540, and 41. As compared to the tetrazole 8 and the imidazole 9, the pyrroles 18, 19, 27, 28, 34, and 35 are only modest inhibitors of N-acetyl-β-D-glucosaminidase from bovine kidney (Ki values between 10 and 75 μM). indicating the necessity of a heteroatom at the glycosidic position. Ki Values between 100 and 160 μM for the
为了检查四唑8和咪唑9和10对N-乙酰基-β-D-氨基葡萄糖苷酶的强抑制作用是否与对应于糖苷O原子的杂原子的存在有关,我们制备了GlcNAc衍生的吡咯(tetrahydroindolizinesnes )18,19,27,28,34,和35,缺乏这样的杂原子。为了这。葡萄糖衍生的吡咯11 - 13用的处理过的路易斯在叠氮化三甲基甲硅烷的存在下酸。动力学控制的条件有利于形成葡糖-azides 14,23,和30,而热力学控制青睐甘露-azides 20,29,和36。还原叠氮化物的14,20,23,30,和36加入Pd / C催化的氢解,或更好,与丙二硫醇和Et 3 N,随后通过乙酰化或三氟乙酰化和氢解去苄基,得到脱保护的乙酰氨基和三氟乙酰氨基吡咯18,19,22,27,28,34,35 40,和41。相比于四唑8和咪唑9,所述吡咯类18,19,27,28,34,和35都是仅适度抑制剂ñ从牛