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The synthesis of 2-O-α-d-galactopyranosyl-d-galactopyranose and 2-O-(2-O-α-d-galactopyranosyl-α-d-galactopyranosyl)-d-glucopyranose undeca-acetate

✍ Scribed by Bogdan Doboszewski; Aleksander Zamojski

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
714 KB
Volume
132
Category
Article
ISSN
0008-6215

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✦ Synopsis

The synthesis of 2-~-cY-D-galaCtOpyranOSyl-D-galaCtOpyranOSC was accomplished by condensation of 2,3,4.6-tetra-0-benzyl-a-D-galactopyranosyl chloride with 2,2,2-trichloroethyl 3,4,6-tri-O-benzyl-a-D-galactopyranoside in the presence of mercuric cyanide. The title trisaccharide undeca-acetate was prepared by condensing 1 ,3,4,6-tetra-O-acety1-2-0-(3,4,6-tri-O-acetyl-cY-D-galactopyranosyl)-a-D-ghrcopyranose with 2,3,4,6-tetra-0-benzyl-a-D-galactopyranosyl chloride or bromide in the presence of various glycosidation catalysts, followed by debenzylation and acetylation.

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