3-Amino-3-arylpropionic acid n-alkyl esters, process for production thereof, and process for production of optically active 3-amino-3-arylpropionic acids and esters of the antipodes thereto
申请人:Yamamoto Yasuhito
公开号:US20060178433A1
公开(公告)日:2006-08-10
The present invention is to provide an n-alkyl 3-amino-3-arylpropionate represented by the formula (I):
wherein Ar
1
represents an aryl group which may have a substituent(s), provided that a phenyl group and 4-methoxyphenyl group are excluded, R
1
represents an n-propyl group or an n-butyl group,
and a process for preparing the same, and its optically active compound and an optically active (S or R)-3-amino-3-arylpropionic acid represented by the formula (III-a):
wherein Ar represents an aryl group which may have a substituent(s), and * represents an asymmetric carbon,
and a process for preparing an optically active n-alkyl (R or S)-3-amino-3-arylpropionate represented by the formula (IV-a):
wherein Ar and R
1
have the same meanings as defined above, * represents an asymmetric carbon, provided that it has a reverse absolute configuration to the compound of the formula (III-a).
3-AMINO-3-ARYLPROPIONIC ACID n-ALKYL ESTERS, PROCESS FOR PRODUCTION THEREOF, AND PROCESS FOR PRODUCTION OF OPTICALLY ACTIVE 3-AMINO-3-ARYLPROPIONIC ACIDS AND ESTERS OF THE ANTIPODES THERETO
申请人:Ube Industries, Ltd.
公开号:EP1621529A1
公开(公告)日:2006-02-01
The present invention is to provide an n-alkyl 3-amino-3-arylpropionate represented by the formula (I):
wherein Ar1 represents an aryl group which may have a substituent(s), provided that a phenyl group and 4-methoxyphenyl group are excluded, R1 represents an n-propyl group or an n-butyl group,
and a process for preparing the same, and its optically active compound and an optically active (S or R)-3-amino-3-arylpropionic acid represented by the formula (III-a):
wherein Ar represents an aryl group which may have a substituent(s), and * represents an asymmetric carbon,
and a process for preparing an optically active n-alkyl (R or S)-3-amino-3-arylpropionate represented by the formula (IV-a):
wherein Ar and R1 have the same meanings as defined above, * represents an asymmetric carbon, provided that it has a reverse absolute configuration to the compound of the formula (III-a).
β-Styryl- and β-Aryl-β-alanine Products of Phenylalanine Aminomutase Catalysis
作者:Karin L. Klettke、Sanjit Sanyal、Washington Mutatu、Kevin D. Walker
DOI:10.1021/ja071328w
日期:2007.6.6
The substrate specificity of a Taxus-derived phenylalanine aminomutase (PAM) was investigated, and the enzyme was found to catalyze the conversion of variously substituted vinyl- and aryl-S-alpha-alanines to corresponding beta-amino acids. This study shows the broad substrate specificity of PAM and thus demonstrates a potential, practical biosynthetic route toward unnatural beta-amino acid subunits of Taxol analogues and beta-peptides.
Process for the preparation of (R)-Beta-Arylalanines by coupled Racemase/Aminomutase catalysis
申请人:Walker Kevin D.
公开号:US20100285540A1
公开(公告)日:2010-11-11
A process for producing (R)-β-arylalanines is described. The process converts (S)-α-arylalanine to (R)-β-arylalanine using phenylalanine aminomutase and amino acid racemase. The (R)-β-arylalanine product can be used to form pharmaceutically useful drugs. Also disclosed are DNA sequences encloding phenylalanine aminomutase and amino acid racemase enzymes, sequences for PCR primers of the DNA sequences, and sequences for expressed aminomutase and amino acid racemase enzymes.
Enhanced Conversion of Racemic α-Arylalanines to (<i>R</i>)-β-Arylalanines by Coupled Racemase/Aminomutase Catalysis
作者:Brad M. Cox、Joshua B. Bilsborrow、Kevin D. Walker
DOI:10.1021/jo9009563
日期:2009.9.18
aminomutase (PAM) enzyme converts several (S)-α-arylalanines to their corresponding (R)-β-arylalanines. After incubating various racemic substrates with 100 μg of PAM for 20 h at 31 °C, each (S)-α-arylalanine was enantioselectively isomerized to its corresponding (R)-β-product. With racemic starting materials, the ratio of (R)-β-arylalanine product to the (S)-α-substrate ranged between 0.4 and 1.8, and