[EN] BETA-SECRETASE INHIBITING COMPOUNDS HAVING OXO-DIHYDRO-PYRAZOLE MOIETY<br/>[FR] COMPOSÉS INHIBITEURS DE LA BÉTA-SÉCRÉTASE CONTENANT UN FRAGMENT D'OXO-DIHYDRO-PYRAZOLE
申请人:LG LIFE SCIENCES LTD
公开号:WO2009038411A3
公开(公告)日:2009-05-07
General and Versatile Approach to the Synthesis of Optically Active 5- Alkylpiperazine-2-carboxylic Acids
General and convenient syntheses of optically active 5-alkylpiperazine-2-carboxylic acids are described. The methods are based on cyclization of L- or D-serine with α-amino acids and occur without loss of optical purity. The presented procedures are based on readily available starting materials and can be arranged for multigram quantities.