FIELD: chemical industry. SUBSTANCE: described is method of forming plurality of regioselective glycoside bonds which comprises treating first bifunctional glycoside containing anomeric sulfoxide substituent with effective amount of activating agent is organic solvent to form first glycoside which as glycosil acceptor and glycosil donor characteristics in one reactor without intermediate purification and isolation. EFFECT: simplified process and high yield of the desired product. 51 cl, 17 dwg, 18 ex
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