INTERMEDIATES AND PROCESSES FOR THE PREPARATION OF 4-(ACETYLAMINO))-3-[(4-CHLORO-PHENYL)THIO]-2-METHYL-L1-INDOLE-1-ACETIC ACID

摘要

The invention relates to compounds of formula (X), and salts thereof, and their use as intermediates in improved manufacturing processes for the synthesis of pharmaceutical compound of formula (I): X is =0, =N-0H or =N-OC(O)Me; Y is hydrogen, PhS- or p-chlorophenylsulfanyl; Z is hydrogen or -CH2COOR1 wherein R1 is selected from hydrogen, optionally substituted hydrocarbyl and optionally substituted heterocyclyl.