Immunomodulatoryα-Galactoglycosphingolipids: Synthesis of a 2′-O-Methyl-α-Gal-GSL and Evaluation of Its Immunostimulating Capacity
作者:Lucia Barbieri、Valeria Costantino、Ernesto Fattorusso、Alfonso Mangoni、Elisabetta Aru、Silvia Parapini、Donatella Taramelli
DOI:10.1002/ejoc.200300512
日期:2004.2
The total synthesis of 1-2-docosanoylamino-O-(2-O-methyl-α-D-galactopyranosyl)-1,3,4-octadecanetriol (2), a 2′-methoxy analog of the immunostimulating α-galactoglycosphingolipid 1, is reported. Stereoselective α-glycosylation of the azido precursor of sphingosine was successfully performed for the first time using an improved Mukaiyama reaction. When assayed in a 72 h splenocyte proliferation test
1-2-二十二烷酰氨基-O-(2-O-甲基-α-D-吡喃半乳糖基)-1,3,4-十八烷三醇 (2) 的全合成,一种免疫刺激性 α-半乳糖糖鞘脂 1 的 2'-甲氧基类似物, 报道。首次使用改进的 Mukaiyama 反应成功地进行了鞘氨醇叠氮前体的立体选择性 α-糖基化。当在 72 小时脾细胞增殖试验中测定时,化合物 2 的刺激性明显低于非甲基化化合物 1,这表明半乳糖 2-OH 基团对于 α-Gal-GSL 的免疫刺激活性是必不可少的。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)