A De Novo Route to 3,6-Dideoxy Sugars
Sheng Yang1,2,3, Chun-Jui Chu4,1, Todd L Lowary4,1,5,3
1Institute of Biological Chemistry, Academia Sinica, Nangang, Taipei 11529, Taiwan.
Abstract:
We report the de novo asymmetric synthesis of the 3,6-dideoxy sugars abequose, paratose, and tyvelose from 2-acetylfuran. Conversion of this readily available ketone to a pyranone derivative was followed by transformation to either an α- or β-glycoside via diasteroselective acylation. Michael addition at C2 controlled primarily by the C1 configuration in the glycoside produced 3,6-dideoxy-4-keto sugars, which could be reduced and converted to either fully deprotected monosaccharides or to immediate precursors of glycosyl donors.
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