Enzymatic/Chemical Synthesis and Biological Evaluation of Seven-Membered Iminocyclitols
作者:Francisco Morís-Varas、Xin-Hua Qian、Chi-Huey Wong
DOI:10.1021/ja960975c
日期:1996.1.1
a C2 symmetry axis, and N-acetylglucosamine to a 6-acetamidoiminocyclitol. Asymmetrization of the meso azasugar was carried out by chemical means, to yield a 3-methoxy-4,5,6-trihydroxyazepane. An attempted enzymatic synthesis of the methoxy derivatives of these azasugars was unsuccessful, leading, however, to both enantiomers of 1-deoxy-2-O-methylmannojirimycin. Some of these c...
已经通过化学酶促或化学合成获得了几种多羟基全氢氮杂。(±)-3-叠氮基-2-羟基丙醛和磷酸二羟丙酮 (DHAP) 在 DHAP 依赖性醛缩酶存在下缩合,然后用酸性磷酸酶和异构酶处理得到 6-叠氮基-6-脱氧吡喃糖,其在还原胺化后得到标题化合物。亚氨基环醇也可以通过吡喃醛糖的化学操作获得,保护为苄基糖苷或二异丙叉基醚。因此,d-半乳糖产生内消旋 3,4,5,6-四羟基全氢氮杂,d-甘露糖产生具有 C2 对称轴的衍生物,N-乙酰氨基葡萄糖产生 6-乙酰氨基亚氨基环醇。通过化学方法进行内消旋氮杂糖的不对称化,得到 3-甲氧基-4,5,6-三羟基氮杂环庚烷。对这些氮杂糖的甲氧基衍生物的酶促合成尝试未成功,但导致了 1-脱氧-2-O-甲基甘露尻霉素的两种对映异构体。其中一些...