[EN] A PROCESS FOR THE PREPARATION OF OXINDOLE DERIVATIVES<br/>[FR] PROCEDE DE PREPARATION DE DERIVES D'OXINDOLE
申请人:SUN PHARMACEUTICAL IND LTD
公开号:WO2003099198A2
公开(公告)日:2003-12-04
A process for the preparation of oxindole derivative of formula (I) comprising reacting compound of formula (II) with dialkyl malonate, COOR1-COOR1, in the presence of a mild base to give compound of formula (III); and wherein R is selected from hydrogen, linear, branched or cyclic alkyl, aryl, substituted aryl, heteroaryl, haloalkyl like CF3, alkoxy, haloalkoxy, thioalkyl and halogen.; R1 is selected from linear, branched and cyclic alkyl (C1 to C4 groups); and X is selected from chloro, bromo, fluoro and iodo groups;further converting compound of formula (III) to compound of formula (I).