Effects of solvent and temperature on the 1,4-asymmetric induction in the diastereoselective hydrogenation of dehydrodipeptides.
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概要
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A study of the effets of solvent and temperature on the stereoselectivity of asymmetric hydrogenation of dehydrodipeptides has been made with Rh(I)–(DPP-AE) catalyst, in which an electrostatic interaction is possible between the dimethylamino group of the ligand and the carboxyl group of the substrate. The highest stereoselectivity was attained in the MeOH–water solvent, while aprotic solvents such as DMF and THF gave comparatively low selectivity and reactivity. With increasing the temperature from −40 °C to 80 °C in alcoholic solvent, the stereoselectivity increased to reach a maximum at 20–40 °C, then decreased. The effects of solvent and temperature on the stereoselectivity were discussed.
- 公益社団法人 日本化学会の論文
著者
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Ikeda Satoru
Department Of Electrical Engineering Kyushu University
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Yamagishi Takamichi
Department Of Applied Chemistry Graduate School Of Engineering Tokyo Metropolitan University
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Yamaguchi Motowo
Department Of Applied Chemistry Graduate School Of Engineering Tokyo Metropolitan University
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Hida Mitsuhiko
Department of Industrial Chemistry, Faculty of Technology, Tokyo Metropolitan University
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Hida Mitsuhiko
Department of Industrial Chemistry, Faculty of Engineering, Tokyo Metropolitan University
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