Synthesis of C-spiro-glycoconjugates from sugar lactones via zinc mediated Barbier reaction?

RSC Advances Pub Date: 2014-01-09 DOI: 10.1039/C3RA46796A

Abstract

Anomeric gem-diallylation, mono-β-crotylation and mono-β-propargylation of sugar 1,5 and 1,4 lactones have been achieved under Barbier reaction conditions using Zn powder and a catalytic amount of TMSCl as an activator. Ring closing olefin metathesis of the synthesized gem-diallyl derivatives furnished C-spiro cyclopentene glycosides. Finally, the cyclopentene rings were converted into carbohydrate based tricyclic morpholine fused triazole glycoconjugates as potential SGLT2 inhibitors.

Graphical abstract: Synthesis of C-spiro-glycoconjugates from sugar lactones via zinc mediated Barbier reaction
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