Abstract
The metal-catalyzed photoreaction was carried out on some sugar molecules. Under the irradiation in the presence of titanium (IV) chloride in methanol, D- glucose, D- mannose, or D- galactose underwent a selective bond cleavage at the C5-C6 position, producing the corresponding pentodialdose derivatives, while these aldohexoses underwent the selective bond cleavage at the C1-C2 position under the irradiation in the presence of iron (III) chloride in pyridine, producing aldopentoses. Both reactions are considered to proceed through an electron transfer within a metal chelate. Synthetic utilities of the products were discussed.
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