isomerization of various racemic α- and β-arylalanines catalysed by phenylalanine 2,3-aminomutase from Pantoea agglomerans (PaPAM) was investigated. Both α- and β-arylalanines were accepted as substrates when the aryl moiety was relatively small, like phenyl, 2-, 3-, 4-fluorophenyl or thiophen-2-yl. While 2-substituted α-phenylalanines bearing bulky electron withdrawing substituents did not react, the corresponding
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).
Racemic Drug Resolution Using Polymer Supported Chiral Selector
申请人:COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEAECH
公开号:US20160208088A1
公开(公告)日:2016-07-21
The present invention relates to a process for the separation of enantiomers or resolution of racemic mixtures using high surface area core-shell polymer beads. The present invention further relates to a core-shell functionalized polymer comprising a core which comprises copolymer made from monomers selected from non-aromatic acrylate, ethylene dimethacrylate and divinyl-benzene, a shell which comprises monomers selected from glycidyl ethers of methacrylate and a chiral selector selected from tartaric acid derivatives and amino acids.