Abstract

Sialidase-resistant ganglioside analogues having biological activities similar to those of natural gangliosides are expected to be important probes for clarifying the biological functions of gangliosides. Focusing on difluoromethylene-linked (CF2-linked) α(2,3)sialylgalactose as a core structure of sialidase-resistant ganglioside mimics, we have developed novel, stereocontrolled, and efficient methodologies to synthesize CF2-sialosides based on Ireland−Claisen rearrangement. CF2-linked α(2,3)sialylgalactose and CF2-linked GM4 were synthesized.

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