Stereoselective Glycal Fluorophosphorylation: Synthesis of ADP-2-fluoroheptose, an Inhibitor of the LPS Biosynthesis
作者:Hirofumi Dohi、Régis Périon、Maxime Durka、Michael Bosco、Yvain Roué、François Moreau、Sylvestre Grizot、Arnaud Ducruix、Sonia Escaich、Stéphane P. Vincent
DOI:10.1002/chem.200801279
日期:2008.10.29
describes the synthesis of a fluorinated analogue of ADP-L-glycero-beta-D-manno-heptopyranose, the donor substrate of the heptosyl transferase WaaC, which catalyzes the incorporation of this carbohydrate into LPS. Synthetically, the key step for the preparation of ADP-2F-heptose is the simultaneous and stereoselective installation of both the fluorine atom at C-2 and the phosphoryl group at C-1 through a
在重要的细菌糖脂(例如脂多糖(LPS))中发现了七糖甙,其生物合成目标是开发新型抗菌剂。这项工作描述了七烷基转移酶WaaC的供体底物ADP-L-甘油-β-D-甘露聚糖-庚糖的氟化类似物的合成,它催化了这种碳水化合物向LPS的掺入。合成而言,制备ADP-2F庚糖的关键步骤是通过selectfluor介导的(selectfluor = 1-氯甲基-4)同时和立体选择性地同时安装C-2处的氟原子和C-1处的磷酰基-氟二氮杂双环[2.2.2]辛烷双(三氟甲磺酸酯)亲电加成/涉及庚糖基的亲核取代。所以,