Processes For Preparing Optically Active (S Or R-)-Beta-Amino Acid And Optically Active (R Or S)-Beta-Amino Acid Ester, And Beta-Amino Acid 2-Alkoxyethyl Ester And Optically Active (S Or R)-Beta Amino Acid 2-Alkoxyethyl Ester
申请人:Konegawa Tadayoshi
公开号:US20080038785A1
公开(公告)日:2008-02-14
The present invention relates to a process for preparing an optically active (S or R)-β-amino acid represented by the formula (II):
wherein R represents an alkyl group, alkenyl group, alkynyl group, cycloalkyl group, aralkyl 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)-β-amino acid ester represented by the formula (III):
wherein R has the same meaning as defined above, R
1
represents an alkyl group which may have a substituent(s), and * represents an asymmetric carbon atom, provided that it has a reverse absolute configuration to that of the compound of the formula (II),
which comprises selectively hydrolyzing water and one of enantiomers of a β-amino acid ester represented by the formula (I):
wherein R and R
1
have the same meanings as defined above, which is a racemic mixture, in the presence of a hydrolase in an organic solvent.
本发明涉及一种制备光学活性的(S或R)-β-氨基酸的过程,其表示为公式(II):其中R表示一种可以具有取代基的烷基、烯基、炔基、环烷基、芳基、芳基烷基或杂环芳基,*表示一个不对称碳原子,以及一种光学活性的(R或S)-β-氨基酸酯,其表示为公式(III):其中R具有上述定义的相同含义,R1表示一种可以具有取代基的烷基,*表示一个不对称碳原子,前提是它具有与公式(II)化合物相反的绝对构型,其包括在有机溶剂中,在水和公式(I)表示的β-氨基酸酯的对映体之一中选择性水解,其中R和R1具有上述定义的相同含义,它是一个外消旋混合物,存在水解酶。