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Determination of the absolute configuration of (-)-(3R)-O-beta-D-glucopyranosyloxy-5-phenylpentanoic acid from Polygonum salicifolium.

Research paper by W M WM Ganci, A A Kuruüzüm, I I Caliş, P P Rüedi

Indexed on: 26 Feb '00Published on: 26 Feb '00Published in: Chirality



Abstract

The absolute configuration of the title compound has been determined after its enzymatic hydrolysis to 3-hydroxy-5-phenylpentanoic acid, esterification, and identification of the enantiomerically pure methyl (3R)-hydroxy-5-phenylpentanoate by HPLC on Chiralcel(R)OD-H. For reasons of inconsistent literature data, enantioselective reductions of methyl 3-oxo-5-phenylpentanoate have been reinspected and the stereochemical outcome unequivocally confirmed by both chiroptical and HPLC retention data.