Synthesis of (R)-2-methyl-4-deoxy and (R)-2-methyl-4,5-dideoxy analogues of 6-phosphogluconate as potential inhibitors of 6-phosphogluconate dehydrogenaseElectronic supplementary information (ESI) available: experimental procedure and spectroscopic data (1H NMR, 13C NMR, DEPT) for compounds 2, 12, 13, 14, 15 and 21b and the previous synthetic approach tried for the synthesis of (2R)-2-methyl-4,5-dideoxy analogues. See http://www.rsc.org/suppdata/ob/b2/b210606j/
Dardonville, Christophe; Gilbert, Ian H.; Dardonville Christophe; Welsh School of Pharmacy, Cardiff University; Gilbert Ian H.; Welsh School of Pharmacy, Cardiff University
Журнал:
Organic & Biomolecular Chemistry
Дата:
2003
Аннотация:
The synthesis of (2R)-2-methyl-4,5-dideoxy and (2R)-2-methyl-4-deoxy analogues of 6-phosphogluconate is described. The synthetic strategy relies on the Evans aldol reaction for the installation of the chiral centres in the 2- and 3-positions. The selective phosphorylation at the primary alcohol function of (2R,3S)-3,6-dihydroxy-2-methylhexanoic acid benzyl ester (5) and (2R,3S,5S)-3,5,6-trihydroxy-2-methylhexanoic acid benzyl ester (20) was achieved with dibenzyl phosphochloridate and dibenzyl phosphoiodinate respectively, working at low temperature. (2R,3S)-3-Hydroxy-2-methyl-6-phosphonoxyhexanoic acid (9) was obtained in 25% overall yield from 4-benzyloxybutanol and (2R,3S,5S)-3,5-dihydroxy-2-methyl-6-phosphonoxyhexanoic acid (28) in 10% overall yield from L-malic acid.
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