Facile synthesis of salmochelin S1, S2, MGE, DGE, and TGE

Salmochelin S1, S2, MGE, DGE, and TGE were prepared through amide bond connection of an aryl C-glucosyl acyl chloride (Ar1COCl) and serine ester amines, followed by hydrogenolysis of the per-benzylated precursors. Each synthesis employed a highly diastereoselective Ni-catalyzed Negishi approach to the aryl C-glycoside subunit.