Total Synthesis of 3-Deoxy-<scp>d</scp>-<i>manno</i>-2-octulosonic Acid (KDO) and 2-Deoxy-β-KDO
作者:Steven D. Burke、Geoffrey M. Sametz
DOI:10.1021/ol9905506
日期:1999.7.1
[formula: see text] Total syntheses of KDO and 2-deoxy-beta-KDO are reported. The C2-symmetric dienediol 4 was desymmetrized by conversion to its corresponding 1,4-dioxanone 5. Ireland-Claisen rearrangement of 5 provided the 6-vinyldihydropyran-2-carboxylate template 6. Double-Sharpless asymmetric dihydroxylation gave the tetraol 7a, which was converted to KDO and 2-deoxy-beta-KDO using methods similar
[化学式:见正文]报告了KDO和2-脱氧-β-KDO的总合成。通过转化成其相应的1,4-二恶烷酮5使C2-对称二烯二醇4不对称化。5的爱尔兰-克莱森重排提供了6-乙烯基二氢吡喃-2-羧酸酯模板6。无双尖锐的不对称二羟基化得到四醇7a,其为转换为KDO和2-deoxy-beta-KDO的方法与以前报道的方法类似。这种合成方案为KDO和KDO类似物提供了灵活的途径。