Abstract
We report a concise synthesis of glycolipid GL1 from Lactobacillus plantarum commencing from methyl α-d-glucopyroside. A Jacobsen hydrolytic kinetic resolution is used to generate a diastereomerically-pure glycidyl glucoside that was elaborated to the diglyceride by stepwise brominolysis, acylation with oleoyl chloride, and bromide-substitution by the tetrabutylammonium salt of 9S,10R-dihydrosterculic acid. GL1 and analogues were shown to signal through the glycolipid pattern recognition receptor Mincle.
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