The glycosylation of 6-O-trityl ethers of N-protected aminomonosaccharides (2, 3, and13 ) with 3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-galactopyranosyl bromide (1) gives disaccharide derivatives (4-6, 14 and 15) with an N-protected amino group in a sugar ring and a latent amino group in the other one. These disaccharide derivatives are transformed into disaccharide diisothiocyanates with the NCS groups in the 2,2 (10-12) or in the 1,2 (20, 21) positions. 1 H and 1 3 C NMR data of prepared compounds are reported.