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    • 6. 发明授权
    • Process for producing optically active tropinonemonocarboxylic acid derivative
    • 光学活性托品酮一羧酸衍生物的制备方法
    • US06486323B1
    • 2002-11-26
    • US09806592
    • 2001-03-30
    • Manabu NodeSoichi NakamuraDaisaku Nakamura
    • Manabu NodeSoichi NakamuraDaisaku Nakamura
    • C07D45102
    • C12P17/10C12P41/00C12P41/005
    • An optically active tropinonemonocarboxylic acid ester derivative useful as an intermediate for synthesis of optically active tropane derivatives was obtained by reacting succindialdehyde with an organic amine and acetonedicarboxylic acid ester to obtain a tropinonedicarboxylic acid ester derivative, and then subjecting this derivative to enzyme-catalyzed asymmetric dealkoxy-carbonylation. Since anhydroecgonine methyl ester derived from the optically active tropinone-monocarboxylic acid ester derivative by reduction and dehydration had the same direction of optical rotation as in the case of anhydroecgonine methyl ester obtained from natural cocaine, it was proved that the obtained optically active tropinonemonocarboxylic acid ester derivative had the same absolute configuration as that of natural cocaine. The yield of the optically active tropinonemonocarboxylic acid ester derivative from the asymmetric dealkoxycarbonylation was 30 to 50 mol %, and its optical purity was 70 to 97% ee. In addition, it was found that a crystalline optically active anhydroecgonine carboxylic acid ester derivative can be obtained by reducing and then dehydrating the optically active tropinonemonocarboxylic acid ester derivative and that its optical purity can easily be increased by recrystallization.
    • 通过使琥珀醛与有机胺和丙酮二羧酸酯反应得到托品酮二羧酸酯衍生物,然后将该衍生物进行酶催化的不对称脱烷基,得到用作合成光学活性托烷衍生物的中间体的光学活性托品酮单羧酸酯衍生物 羰基化。 由于通过还原和脱水衍生自光学活性的托品酮 - 单羧酸酯衍生物的脱氢异君子酸甲酯具有与从天然可卡因得到的脱氢山梨醇甲酯的情况相同的旋光方向,所以证明得到的光学活性托品酮单羧酸酯 衍生物具有与天然可卡因相同的绝对构型。 来自不对称脱烷基羰基化反应的光学活性托品酮二羧酸酯衍生物的收率为30〜50摩尔%,光学纯度为70〜97%ee。 此外,发现通过使光学活性托品酮一羧酸酯衍生物还原然后使其脱水,可以得到结晶光学活性的脱氢gon根化羧酸酯衍生物,并且可以通过重结晶容易地提高其光学纯度。