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The synthesis of the 2,4,3'-trideoxy and 2,4,3',4'-tetradeoxy analogues of the trimannoside part of the core structure of N-linked glycoproteins, methyl 3,6-di-O-α-d-mannopyranosyl-α-d-mannopyranoside, is described. A 2,4-dideoxy (16)-linked disaccharide was used as a common intermediate acceptor, which was coupled with a 3-deoxy and a 3,4-dideoxy benzochlorosugar donor, the latter prepared from methyl...