Phytoelicitor active heptasaccharide

An example of this strategy is the synthesis of the heptasaccharide (52) which has phytoelicitor activity [14]. As shown in the retrosynthetic analysis (Scheme 5.10), the heptasaccharide (52) is disconnected into the trisaccharide thioglycoside (53) and the simple D-glucose derivative (54). The trisaccharide block (53) is available from the glycosyl bromides (55,56) and the thioglycoside (57). 

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