Asymmetric synthesis by chiral ruthenium complexes : III. Regioselectivity and asymmetric induction in catalytic hydrogenation of α,β-unsaturated dicarboxylic acids☆

作者: Mario Bianchi , Franco Piacenti , Piero Frediani , Ugo Matteoli , Carlo Botteghi

DOI: 10.1016/S0022-328X(00)90671-5

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摘要: Abstract The homogeneous catalytic hydrogenation of citraconic and mesaconic acids in the presence H4Ru4(CO)8[(—)-DIOP]2 gives, addition to (—)(S)-methylsuccinic acid, a mixture λ-lactones ratios which depend on substrate reaction temperature. An exceptionally high regioselectivity is obtained at 120°C more hindered carboxyl group acid.

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