Fluorine-Directed β-Galactosylation: Chemical Glycosylation Development by Molecular Editing
作者:Estelle Durantie、Christoph Bucher、Ryan Gilmour
DOI:10.1002/chem.201200468
日期:2012.6.25
Validation of the 2‐fluoro substituent as an inert steering group to control chemical glycosylation is presented. A molecular editing study has revealed that the exceptional levels of diastereocontrol in glycosylation processes by using 2‐fluoro‐3,4,6‐tri‐O‐benzyl glucopyranosyl trichloroacetimidate (TCA) scaffolds are a consequence of the 2R,3S,4S stereotriad. This study has also revealed that epimerization
提出了将2-氟取代基作为控制化学糖基化反应的惰性指导基团的验证方法。一项分子编辑研究表明,通过使用2-氟-3,4,6-三-O-苄基吡喃葡萄糖基三氯乙酰亚氨酸酯(TCA)支架,糖基化过程中非对映异构控制的异常水平是2 R,3 S,4的结果S立体三合会。这项研究还表明,C4的差向异构作用会导致β选择性大大提高(高达β/α300:1)。