Abstract:We designed α(2,3)- and α(2,6)-sialylgalactose analogues bearing an exomethylene unit at C3 of sialic acid (3-exoSia) as a novel type of mechanism-based inhibitors of sialidases. Regio- and stereo-selective substitution by vinylogous activation enabled simultaneous construction of the 3-exomethylene moiety and the O-sialoside linkage. Both types of 3-exoSia disaccharides potently inhibit Clostridium perfringens sialidase NanI and selectively inhibit NEU2 among human sialidases, whereas the corresponding monosa… Show more
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