Synthesis of α-Galactosyl Ceramide (KRN7000) and Analogues Thereof via a Common Precursor and Their Preliminary Biological Assessment
作者:Mario Michieletti、Antonio Bracci、Federica Compostella、Gennaro De Libero、Lucia Mori、Silvia Fallarini、Grazia Lombardi、Luigi Panza
DOI:10.1021/jo8019994
日期:2008.11.21
practical synthesis of alpha-GalCer and of its analogues is presented, opening the chance to easily modify the sphingosine chain. The common precursor is a disaccharide, obtained by coupling tetra-O-benzyl-D-galactose with allyl 2,3-O-isopropylidene-D-lyxofuranoside. Introduction of alkyl chains via Wittig reaction (for alpha-GalCer and OCH) or via Williamson reaction (for oxa analogues) followed by
提出了一种新的实用的α-GalCer及其类似物的合成方法,这为轻松修饰鞘氨醇链提供了机会。常见的前体是二糖,其通过将四-O-苄基-D-半乳糖与烯丙基2,3-O-异亚丙基-D-呋喃呋喃糖苷偶联而获得。通过Wittig反应(对于α-GalCer和OCH)或Williamson反应(对于oxa类似物)引入烷基链,然后进行标准合成步骤,可以使人们有效地获得此类化合物。当表达CD1d的细胞呈递时,这些类似物能够激活iNKT细胞。