Asymmetric hydrogenation catalyzed by bis(disubstituted glyoximato)cobalt(II)(L)-chiral cocatalyst system. Effect of structural variation of ligands and hydrogen pressure.
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概要
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The reaction rate was extremely enhanced by increasing the basicity of the axial ligand of [Co(dmgH)<SUB>2</SUB>(L)] and by increasing the hydrogen pressure without decreasing the enantioselectivity. Substituting one and two methyl groups of the dimethylglyoxime ligand in [Co(dmgH)<SUB>2</SUB>(L)] with a phenyl group enhanced and retarded the reaction rate, respectively. The chirality at the cobalt did not affect the enantioselectivity.
- 公益社団法人 日本化学会の論文
著者
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Takeuchi Seiji
Niigata College Of Pharmacy
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OHGO Yoshiaki
Niigata College of Pharmacy
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Tashiro Yasuhisa
Niigata College of Pharmacy
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