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Conveniently activated dimers: (pentachlorophenyl 6-(6′-(tert-butoxycarbonylamino)-6′-deoxy-2′,3′,4′,5′-tetra-O-methyl-d-galactonamide)-6-deoxy-2,3,4,5-tetra-O-methyl-d-galactonate) 7 and its analogue in the l-series 16, were prepared, respectively, from 6-amino-6-deoxy-d- and l-galactonic acid derivatives 5 and 14. Upon release of the amino function of 7 under acidic conditions, polymerization was...
High yielding routes for the synthesis of selectively protected derivatives of d- and l-galactonic acids, having free OH or NH 2 groups at the C-6 position, are reported. The successful direct per-O-methylation of galactonic acid derivatives from the corresponding galactono-1,4-lactones was developed as a key step of the sequence. For example, 6-azido-6-deoxy-l-galactono-1,4-lactone 16 was...
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