Abstract:
3-Amino-3-arylpropionic acid n-alkyl esters represented by the general formula (I); a process for the production of the same; and optical isomers thereof: (I) [wherein Ar is optionally substituted aryl exclusive of phenyl and 4-methoxyphenyl; and R is n-propyl or n-butyl], and a process for the production of optically active (S or R)-3-amino-3-arylpropininc acids represented by the general formula (III-a): (III-a) [wherein Ar is optionally substituted aryl; and * is an asymmetric carbon] and optically active (R or S)-3-amino-3-arylpropionic acid n-alkyl esters represented by the general formula (IV-a): (IV-a) [wherein Ar, R and * are each as defined above, with the proviso that each ester has an absolute configuration opposite to that of the compound (III-a)].
Abstract:
A 3-substituted oxyglutaric diester compound represented by the following formula (I): (I) [wherein R 's may be the same or different and each represents (un)substituted alkyl; and R represents (un)substituted alkyl, (un)substituted alkenyl, (un)substituted aralkyl, or (un)substituted aryl]; and an optically active 3-substituted oxyglutaric monoester compound represented by the formula (IV): (IV) (wherein R and R are the same as defined above).
Abstract:
A process in which a racemic mixture of an N-substituted ß-amino acid alkyl ester or N-substituted 2-homopipecolic acid ester represented by the general formula (I): (I) (wherein Ar, R , R , R , R , and R are as defined in the description) is subjected to selective hydrolysis of only either of the enantiomers in the presence of a hydrolase to yield an optically active, N-substituted ((R) or (S))-ß-amino acid or optically active, N-substituted ((R) or (S))-2-homopipecolic acid represented by the general formula (II): (II) and simultaneously obtain the unreacted, optically active, N-substituted ((S) or (R))-ß-amino acid alkyl ester or unreacted, optically active, N-substituted ((S) or (R))-2-homopipecolic acid ester represented by the general formula (III): (III) which has the absolute configuration opposite to that of the compound represented by the general formula (II).