5058-01-5Relevant articles and documents
A 2,5-di-hydroxy valeric acid DELTA lactone synthetic method
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Paragraph 0006; 0014; 0018-0021, (2017/03/14)
The invention aims to provide a synthesizing method of 2,5-dihydroxyvaleric acid delta lactone. The synthesizing method comprises an improved and economical method for synthesizing lactone derivatives and the like. Importantly, the synthesizing method is suitable for high-selectivity low-cost mass production.
Aluminium(III) Coordination to Hydroxy Carboxylates: the Influence of Hydroxy Substituents Enabling Tridentate Binding
Best, Wayne M.,Harrowfield, Jack M.,Shand, Todd M.,Stick, Robert V.
, p. 2023 - 2032 (2007/10/02)
Potentiometric evalution of the interaction between aluminium(III) and the hydroxy carboxylates 3-deoxy-D-ribo-hexonate (L1H) and 2,5-dihydroxypentanoate (L2H) provided evidence for the formation of 1:1 complexes only, though with the ligand being present in singly, doubly and quadruply deprotonated forms in the hexonate complexes, and in singly, doubly and triply deprotonated forms in those of the pentanoate.At 298 K in aqueous media, I = 0.1 (NaCl), equilibrium quotient values obtained through use of the programs PKAS and BEST were: -log(1)->+>/1H>) (or pKa(L1H)) = 3.58+/-0.03; log(1)2+>/3+>1)->) = 1.97+/-0.03; log(-1L1)+>+>/1)2+>) = -2.83+/-0.05; log(-3L1)->+>2/-1L1)+>) = -9.17+/-0.08; -log(2)->+>(2H>) (or pKa(L2H)) = 3.92+/-0.03; log(2)2+>/3+>2)->) = 2-04+/-0.03; log(-1L2)+>+>/2)2+>) = -3.14+/-0.06; log(-2L2>+>/-1L2)+>) = -2.25+/-0.09.The very close similarity of the results for 3-deoxy-D-ribo-hexonate (3-deoxygluconate) and those known for D(+)-gluconate has led to the suggestion that the complexes of the quadruply deprotonated ligands may involve trialkoxo coordination through the C1, C5 and C6 substituents.
Hydrogenation process for the formation of 3,5-dihydro HMG-CoA reductase inhibitors
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, (2008/06/13)
A novel hydrogenation process, using a homogenous iridium or rhodium catalyst for selectively adding hydrogen to the 3,5 positions in the polyhydronaphthyl ring of lovastatin, simvastatin or C-8-acyl or C-6-substituted analogs thereof, is disclosed.