A method for preparing 2'-O-fucosyllactose, comprising the steps of a) reacting the protected fucose of the general formula where R Si may be the same or different and is a residue of the formula SiR a R b R c, where R a, R b and R c are the same or different and are selected from C 1 -C 8 -alkyl, C 3 -C 8 -cycloalkyl, phenyl and C 3 -C 8 -cycloalkyl-C 1 -C 4 -alkyl; with a compound of the general formula where R 1 is a C(=O)-R 11 residue or an SiR 12 R 13 R 14 residue, in which R 11 is hydrogen, C 1 -C 8 -alkyl, C 1 -C 8 -haloalkyl, C 3 -C 8 -cycloalkyl, C 3 -C 8 -cycloalkyl-C 1 -C 4 -alkyl or phenyl, wherein said phenyl is unsubstituted or optionally has 1 to 5 substituents selected from halogen, CN, NO 2, C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkyl and C 1 -C 4 -haloalkoxy, and R 12, R 13 and R 14 are the same or different and are selected from C 1 -C 8 -alkyl, C 3 -C 8 -cycloalkyl, phenyl and C 3 -C 8 -Cycloalkyl-C 1 -C 4 -alkyl; R 2 may be the same or different and are C 1 -C 8 -alkyl or 2 R 2 residues attached to the same carbon atom together form a linear C 3 -C 6 -alkanediyl, which is unsubstituted or has 1 to 6 methyl groups as substituents; R 3 may be the same or different and are C 1 -C 8 -alkyl or together form a linear C 1 -C 4 -alkanediyl, which is unsubstituted or has 1 to 6 methyl groups as substituents; b) deprotecting the coupling product of the general formula obtained in step a) where R Si, R 1, R 2 and R 3 are as defined above; to obtain 2'-O-fucosyllactose; wherein step a) comprises a.1) treatment of the protected fucose of the general formula with a tri(C 1 -C 6 -alkyl)silyl iodide a.2) reaction of the product obtained in step a.1) with the compound of the formula in the presence of at least one base. a) reacting the protected fucose of the general formula where R Si may be the same or different and is a residue of the formula SiR a R b R c, where R a, R b and R c are the same or different and are selected from C 1 -C 8 -alkyl, C 3 -C 8 -cycloalkyl, phenyl and C 3 -C 8 -cycloalkyl-C 1 -C 4 -alkyl; with a compound of the general formula where R 1 is a C(=O)-R 11 residue or an SiR 12 R 13 R 14 residue, in which R 11 is hydrogen, C 1 -C 8 -alkyl, C 1 -C 8 -haloalkyl, C 3 -C 8 -cycloalkyl, C 3 -C 8 -cycloalkyl-C 1 -C 4 -alkyl or phenyl, wherein said phenyl is unsubstituted or optionally has 1 to 5 substituents selected from halogen, CN, NO 2, C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkyl and C 1 -C 4 -haloalkoxy, and R 12, R 13 and R 14 are the same or different and are selected from C 1 -C 8 -alkyl, C 3 -C 8 -cycloalkyl, phenyl and C 3 -C 8 -Cycloalkyl-C 1 -C 4 -alkyl; R 2 may be the same or different and are C 1 -C 8 -alkyl or 2 R 2 residues attached to the same carbon atom together form a linear C 3 -C 6 -alkanediyl, which is unsubstituted or has 1 to 6 methyl groups as substituents; R 3 may be the same or different and are C 1 -C 8 -alkyl or together form a linear C 1 -C 4 -alkanediyl, which is unsubstituted or has 1 to 6 methyl groups as substituents; R 1 is a C(=O)-R 11 residue or an SiR 12 R 13 R 14 residue, in which R 11 is hydrogen, C 1 -C 8 -alkyl, C 1 -C 8 -haloalkyl, C 3 -C 8 -cycloalkyl, C 3 -C 8 -cycloalkyl-C 1 -C 4 -alkyl or phenyl, wherein said phenyl is unsubstituted or optionally has 1 to 5 substituents selected from halogen, CN, NO 2, C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkyl and C 1 -C 4 -haloalkoxy, and R 12, R 13 and R 14 are the same or different and are selected from C 1 -C 8 -alkyl, C 3 -C 8 -cycloalkyl, phenyl and C 3 -C 8 -Cycloalkyl-C 1 -C 4 -alkyl; R 11 is hydrogen, C 1 -C 8 -alkyl, C 1 -C 8 -haloalkyl, C 3 -C 8 -cycloalkyl, C 3 -C 8 -cycloalkyl-C 1 -C 4 -alkyl or phenyl, wherein said phenyl is unsubstituted or optionally has 1 to 5 substituents selected from halogen, CN, NO 2, C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkyl and C 1 -C 4 -haloalkoxy, and R 12, R 13 and R 14 are the same or different and are selected from C 1 -C 8 -alkyl, C 3 -C 8 -cycloalkyl, phenyl and C 3 -C 8 -Cycloalkyl-C 1 -C 4 -alkyl; R 2 may be the same or different and are C 1 -C 8 -alkyl or 2 R 2 residues attached to the same carbon atom together form a linear C 3 -C 6 -alkanediyl, which is unsubstituted or has 1 to 6 methyl groups as substituents; R 3 may be the same or different and are C 1 -C 8 -alkyl or together form a linear C 1 -C 4 -alkanediyl, which is unsubstituted or has 1 to 6 methyl groups as substituents; b) deprotecting the coupling product of the general formula obtained in step a) where R Si, R 1, R 2 and R 3 are as defined above; to obtain 2'-O-fucosyllactose; a.1) treatment of the protected fucose of the general formula with a tri(C 1 -C 6 -alkyl)silyl iodide a.2) reaction of the product obtained in step a.1) with the compound of the formula in the presence of at least one base.