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Comparative study of homogeneous hydrogenation of d-glucose and d-mannose catalyzed by water soluble [Ru(tri(m-sulfophenyl) phosphine)] complex

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Abstract

Homogeneous hydrogenation of two epimeric aldoses, d-glucose (d-Glc) and d-mannose (d-Man) was performed in water, with molecular hydrogen and by transfer hydrogenation catalyzed by [Ru-TPPTS] complex (TPPTS = trisodium salt of tri(m-sulfophenyl)phosphine). Both method proved effective, and revealed d-Man as more reactive aldose. Hydrogen transfer has been studied with various hydrogen donors: the most effective, but highly pH-dependent system has been found in Et3N/formic acid (azeotropic mixture 2:5) as the source of hydrogen.

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