Diisopropylethylamine → N-[O-(3-O-Methyl-beta-L-fucopyranosyl)-4-hydroxy-phenylamino-thiocarbonyl]-alanyl-alanine

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Reaction Steps

160 mg (1 mmol) of alanyl-alanine are taken up in 20 ml of dioxane/water 1:1, and 1 ml of Hünig base is added. 1.2 mmol of p-aminophenyl 3-O-methyl-β-L-fucoside (Example 1.2) are first converted into the isothiocyanate in accordance with instructions 10.1.a and the product is then added to the solution of the dipeptide. The mixture is stirred at room temperature for 16 hours and the residue is purified by flash chromatography (acetonitrile/water 15:1). After concentration of the corresponding fractions, the product is precipitated from methanol/ether. Yield: 267 mg (57%).

Provenance & Evidence