[EN] A CATALYTIC ASYMMETRIC METHOD FOR THE PREPARATION OF THE PACLITAXEL (TAXOL) C-13 SIDE-CHAIN DERIVATIVES AND ITS USE IN THE PREPARATION OF TAXANE DERIVATIVES<br/>[FR] PROCÉDÉ ASYMÉTRIQUE CATALYTIQUE POUR LA PRÉPARATION DE DÉRIVÉS DE LA CHAÎNE LATÉRALE C-13 DU PACLITAXEL (TAXOL) ET SON UTILISATION DANS LA PRÉPARATION DE DÉRIVÉS DU TAXANE
申请人:CORDOVA ARMANDO
公开号:WO2010062239A1
公开(公告)日:2010-06-03
A new catalytic asymmetric two-step or one-pot method for the preparation of the C-13 side-chain of paclitaxel (Taxol) and derivatives of the general formula (I) in the form of an acid, salt or ester, in which R represents an aryl group or alkyl group, R1 represents an aryl group or alkyl group, Y represents O, H or alkyl, and X1 represent -CH2-Ph, alkyl, aryl, SiR3 (where the silyl group is a common protective group) or other suitable protective group.
Highly Enantioselective Organocatalytic Addition of Aldehydes to<i>N</i>-(Phenylmethylene)benzamides: Asymmetric Synthesis of the Paclitaxel Side Chain and Its Analogues
Easily side‐tracked: A simple route to the paclitaxel side chain and its analogues is based on the (R)‐proline‐catalyzed addition of aldehydes to N‐(phenylmethylene)benzamides, followed by oxidation of the resulting protected α‐hydroxy‐β‐benzoylaminoaldehydes (92–99 % ee). Esterification of the subsequent phenylisoserine derivatives with baccatin III gives paclitaxel analogues (see scheme).