[EN] PROCESS FOR PRODUCING OPTICALLY ACTIVE 3-(4-HYDROXYPHENYL)PROPIONIC ACIDS<br/>[FR] PROCEDE DE PRODUCTION D'ACIDES 3-(4-HYDROXYPHENYL)PROPIONIQUES OPTIQUEMENT ACTIFS
申请人:TAKASAGO PERFUMERY CO LTD
公开号:WO2005051882A1
公开(公告)日:2005-06-09
The present invention relates to a process for producing an optically active 3-(4-hydroxyphenyl)propionic acid useful as intermediates for medicines, through short steps in good yield and with high optical purity. More specifically, the present invention relates to a process for producing an optically active 3-(4-hydroxyphenyl)propionic acid of the formula (6): wherein R2 is an alkyl group; R5 to R8 are each independently a hydrogen atom or a substituent; and the symbol * is an chiral carbon atom, or a salt thereof, which comprises reacting a benzaldehyde of the formula (1): wherein R1 is a protective group; and R5 to R8 are each the same as defined above, with a glycolic acid derivative of the formula (2): wherein R3 is a hydrocarbon group; and R2 is the same as defined above, hydrolyzing the resulting product to give a cinnamic acid of the formula (4): wherein R1, R2 and R5 to R8 are each the same as defined above, or a salt thereof, and subjecting the resulting cinnamic acid (4) or a salt thereof to asymmetric hydrogenation to give an optically active phenylpropionic acid of the formula (5): wherein all the symbols are each the same as defined above, or a salt thereof, followed by deprotection.
Process for producing optically active 3-(4-hydroxyphenyl)proprionic acids
申请人:Yokozawa Tohru
公开号:US20070142472A1
公开(公告)日:2007-06-21
The present invention relates to a process for producing an optically active 3-(4-hydroxyphenyl)propionic acid useful as intermediates for medicines, through short steps in good yield and with high optical purity. More specifically, the present invention relates to a process for producing an optically active 3-(4-hydroxyphenyl)propionic acid of the formula (6): wherein R
2
is an alkyl group; R
5
to R
8
are each independently a hydrogen atom or a substituent; and the symbol * is an chiral carbon atom, or a salt thereof, which comprises reacting a benzaldehyde of the formula (1): wherein R
1
is a protective group; and R
5
to R
8
are each the same as defined above, with a glycolic acid derivative of the formula (2): wherein R
3
is a hydrocarbon group; and R
2
is the same as defined above, hydrolyzing the resulting product to give a cinnamic acid of the formula (4): wherein R
1
, R
2
and R
5
to R
8
are each the same as defined above, or a salt thereof, and subjecting the resulting cinnamic acid (4) or a salt thereof to asymmetric hydrogenation to give an optically active phenylpropionic acid of the formula (5): wherein all the symbols are each the same as defined above, or a salt thereof, followed by deprotection.
The invention is related to phosphorus substituted anti-cancer compounds, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds.
acetic acid esters modified with electron withdrawing 2-alkoxy-groups was investigated as acylating agent in kinetic resolution (KR) of racemic amines. A homologous series of the isopropyl esters of four 2-alkoxyacetic acids (2-methoxy-, 2-ethoxy-, 2-propoxy- and 2-butoxyacetic acids) were prepared and investigated for enantiomer selective N-acylation, catalyzed by lipaseB from Candidaantarctica, under