Alkylcobyrinate from sucralose and mechanistic aspects of its CoC bond cleavage

Reaction of heptamethyl cob(I)yrinate with 1′,6′-dichloro-1′,6′-dideoxy-β-d-fructofuranosyl-4-chloro-4-deoxy-α-d-galactopyranoside (sucralose) gave an alkylcobyrinate, heptamethyl-6′-[α-d-galactopyranoside- 1′-chloro-1′,6′-dideoxy-β-d-fructofuranosyl-4-chloro-4-deoxy]cobyrinate perchlorate, [(Suc)Cob(III)7C1ester]ClO4. Cleavage behavior of CoC bond of the alkylcobyrinate was investigated under various conditions (hν, H+ and reduction) using UV–vis spectroscopy combined with the EPR spin-trapping technique, and by cyclic voltammetry.