Synthesis of a Heptasaccharide,Structurally Related to the Phytoelicitor Active Glucan of Phytophthora Megasperma F.SP. Glycinea |
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| Authors: | Peter Fugedi Per J Garegg |
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| Institution: | 1. Department of Organic Chemistry , Arrhenius Laboratory, University of Stockholm , S-106 91, Stockholm, Sweden;2. Ingemar Kvarnstr?m and Lars Svansson Department of Chemistry , University of Link?ping , S-581 8, Link?ping, Sweden;3. Department of Organic Chemistry , Arrhenius Laboratory, University of Stockholm , S-106 91, Stockholm, Sweden |
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| Abstract: | Abstract A synthesis is described of the heptasaccharide 1, which may form part of the phytoelicitor-active glucan of Phytopkthora megasperma f. sp. glycinea. Silver triflate was used as the promoter in Koenigs-Knorr type condensations using glycosyl bromides, each with a participating benzoyl group in the 2-position, for the synthesis of the smaller oligosaccharide fragments. For joining the larger ones, methyl triflate was used as the promoter and an oligosaccharide thioglycoside carrying a participating benzoyl group in the 2-position was used as the glycosyl donor. |
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