[EN] PROCESSES FOR PREPARATION OF TAXANES AND INTERMEDIATES THEREOF<br/>[FR] PROCESSUS DE PRÉPARATION DES TAXANES ET DE LEURS INTERMÉDIAIRES
申请人:IVAX RES LLC
公开号:WO2009137084A2
公开(公告)日:2009-11-12
A paclitaxel intermediate of formula 1 : wherein R1 is acetyl, R2 is tert-butyloxycarbonyl (BOC), R3 and R4 are phenyl and R5 is 1- ethoxyethyl, is provided. Also provided are processes for preparing taxane intermediates of formula 1 comprising reacting a compound of formula 2 with a compound of formula 3 wherein, R1, R2 and R5 are independently a hydroxyl protecting group; R3 is phenyl, substituted phenyl, a straight or branched alkyl containing 1 to 12 carbon atoms, alkenyl containing 2 to 12 carbon atoms, cycloalkyl containing 4 to 15 carbon atoms, cycloalkenyl or an R6-O- group in which R6 is: phenyl, substituted phenyl group, a C1-C8 straight or branched alkyl, a C2-C8 straight or branched alkenyl group, a C3-C8 straight or branched alkynyl, a C3-C7 cycloalkyl, C4-C7 cycloalkenyl, a C7-C11 bicycloalkyl substituent, or a saturated or unsaturated nitrogen; and R4 is phenyl or a substituted phenyl group.