Polyfluoroglycoside Synthesis via Simple Alkylation of an Anomeric Hydroxyl Group: Access to Fluoroetoposide Analogues.

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In this work, we have developed a new approach for the synthesis of fluoroglycoside analogues. This strategy used a simple alkylation protocol and allowed the installation of a simple aglyconic alkane with the β configuration. Moreover, the glycosylation of fluorinated glucoside analogues with 4'-demethylepipodophyllotoxin furnished novel fluoroetoposide analogues. In these cases, the α anomers were formed as major products with an S configuration at the C-4 of the aglycone.