We report the first O-BODIPY-glucose conjugates, in which the sugar is directly attached to the BODIPY boron through covalent B-O-C bonds. The reaction of Cl-BODIPY with glucose in acetonitrile produced the 1 : 1 α-glucofuranose BODIPY (1), 1 : 2 α-glucofuranose BODIPY (2) and 1 : 2 α-glucoseptanose BODIPY (3) esters. Compound 3 is a rare instance of the unnatural septanose form of glucose, and the first example of a septanose borate.
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