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    • 6. 发明授权
    • Process for preparing optically active (S or R)-α amino acid and (R or S)-α amino acid ester in one phase organic reaction medium
    • 在一相有机反应介质中制备光学活性(S或R)-α氨基酸和(R或S)-α氨基酸酯)的方法
    • US08143052B2
    • 2012-03-27
    • US12064589
    • 2006-08-25
    • Yasuhito YamamotoHiroyuki MiyataTadayoshi Konegawa
    • Yasuhito YamamotoHiroyuki MiyataTadayoshi Konegawa
    • C12P41/00
    • C12P13/04C12P41/005
    • The present invention discloses a process for preparing an optically active (S or R)-α-amino acid represented by the formula (II): wherein R represents an alkyl group, alkenyl group, alkynyl group, cycloalkyl group, aralkyl group, heteroarylalkyl group, aryl group or heteroaryl group, each of which may have a substituent(s), and * represents an asymmetric carbon atom, and an optically active (R or S)-α-amino acid ester represented by the formula (III): wherein R1 represents an alkyl group which may have a substituent(s), and * represents an asymmetric carbon atom, provided that it has an opposite absolute configuration to that of the compound of the formula (II), which comprises selectively reacting water with one of enantiomers of an α-amino acid ester which is a racemic mixture and represented by the formula (I): wherein R and R1 have the same meanings as defined above, in the presence of a lipase or a protease in an organic solvent.
    • 本发明公开了一种制备由式(II)表示的光学活性(S或R)-α-氨基酸的方法:其中R表示烷基,烯基,炔基,环烷基,芳烷基,杂芳基烷基 ,芳基或杂芳基,每个可以具有取代基,*表示不对称碳原子,和由式(III)表示的光学活性(R或S)-α-氨基酸酯:其中 R 1表示可以具有取代基的烷基,*表示不对称碳原子,条件是其具有与式(II)化合物相反的绝对构型,其包括选择性地使水与 由式(I)表示的α-氨基酸酯的对映异构体:其中R和R 1具有与上述相同的含义,在有机溶剂中存在脂肪酶或蛋白酶的情况下。
    • 9. 发明申请
    • PROCESS FOR PREPARING OPTICALLY ACTIVE (S OR R)-ALPHA-AMINO ACID AND OPTICALLY ACTIVE (R OR S)-ALPHA-AMINO ACID ESTER
    • 制备光学活性(S或R) - 氨基酸和光学活性(R或S) - 氨基 - 氨基酸酯的方法
    • US20090042260A1
    • 2009-02-12
    • US12064589
    • 2006-08-25
    • Yasuhito YamamotoHiroyuki MiyataTadayoshi Konegawa
    • Yasuhito YamamotoHiroyuki MiyataTadayoshi Konegawa
    • C12P13/04
    • C12P13/04C12P41/005
    • The present invention discloses a process for preparing an optically active (S or R)-α-amino acid represented by the formula (II): wherein R represents an alkyl group, alkenyl group, alkynyl group, cycloalkyl group, aralkyl group, heteroarylalkyl group, aryl group or heteroaryl group, each of which may have a substituent(s), and * represents an asymmetric carbon atom, and an optically active (R or S)-α-amino acid ester represented by the formula (III): wherein R1 represents an alkyl group which may have a substituent(s), and * represents an asymmetric carbon atom, provided that it has an opposite absolute configuration to that of the compound of the formula (II), which comprises selectively reacting water with one of enantiomers of an α-amino acid ester which is a racemic mixture and represented by the formula (I): wherein R and R1 have the same meanings as defined above, in the presence of a lipase or a protease in an organic solvent.
    • 本发明公开了一种制备由式(II)表示的光学活性(S或R)-α-氨基酸的方法:其中R表示烷基,烯基,炔基,环烷基,芳烷基,杂芳基烷基 ,芳基或杂芳基,每个可以具有取代基,*表示不对称碳原子,和由式(III)表示的光学活性(R或S)-α-氨基酸酯:其中 R 1表示可以具有取代基的烷基,*表示不对称碳原子,条件是其具有与式(II)化合物相反的绝对构型,其包括选择性地使水与 由式(I)表示的外消旋混合物的α-氨基酸酯的对映异构体:其中R和R 1具有与上述相同的含义,在有机溶剂中存在脂肪酶或蛋白酶。