Synthesis of 4-Azido-4-deoxy-Neu5,7,8,9Ac<sub>4</sub>2en1Me. A Key Intermediate for the Synthesis of GG167 from <scp>d</scp>-Glucono-δ-lactone
作者:Ke-Gang Liu、Shi Yan、Yu-Lin Wu、Zhu-Jun Yao
DOI:10.1021/ol0491890
日期:2004.6.1
Stereoselective synthesis of 5-acetamido-7,8,9-tri-O-acetyl-2,6-anhydro-4-azido-3,4,5-trideoxy-D-glycero-D-gal acto-non-2-enonic acid methyl ester, an advanced key intermediate for the synthesis of neuraminidase inhibitor GG167 (Zanamivir, Relenza), was accomplished using D-glucono-delta-lactone as starting material. A highly diastereoselective allyllation of an imine intermediate, a regioselective azide-opening
[反应:见正文] 5-乙酰氨基7,8,9-三-O-乙酰基-2,6-脱水4-叠氮基-3,4,5-三苯氧基-D-甘油-D-gal的立体选择性合成以D-葡萄糖酸-δ-内酯为起始原料,合成了神经氨酸酶抑制剂GG167(Zanamivir,Relenza)的高级关键中间体,acton-non-2-enonic acid甲基酯。亚胺中间体的高度非对映选择性烯丙基化,氮丙啶的区域选择性叠氮化物开口以及邻位二醇的化学选择性氧化成功地用作关键步骤。