PROCESS FOR THE PREPARATION OF ARYLETHANOLAMINE DERIVATIVES HAVING AN ANTI-OBESITY AND ANTI-DIABETIC PROPERTIES

摘要

A process for the preparation of a compound of Formula (IA) or a pharmaceutically acceptable salt thereof: wherein R1 is an aryl, pyridyl, thiazolyl, phenoxymethyl, or pyrimidyl group, optionally substituted by one or more substituents selected from the group consisting of halogen, hydroxy, C¿1-6?alkoxy, C1-6alkyl, hydroxymethyl, trifluoromethyl, -NR?6R6¿, and -NHSO¿2R?6, where each R6 is independently hydrogen or C¿1-4?alkyl; R?2¿ is hydrogen or C¿1-6?alkyl; R?3¿ is CO¿2R?7 where R7 is hydrogen or C¿1-6?alkyl; R?4 and R5¿ are independently hydrogen, C¿1-6?alkyl, or -CO2C1-6alkyl; and Y is N or CH comprising the step of preparing a diamide of Formula (II) or a pharmaceutically acceptable salt thereof: wherein R?1¿ is an aryl, pyridyl, thiazolyl, phenoxymethyl, or pyrimidyl group, optionally substituted by one or more substituents selected from the group consisting of halogen, hydroxy, C¿1-6?alkoxy, C1-6alkyl, hydroxymethyl, trifluoromethyl, -NR?6R6¿, and -NHSO¿2R?6, where each R6 is independently hydrogen or C¿1-4?alkyl; R?2¿ is hydrogen or C¿1-6?alkyl; R?3¿ is CO¿2R?7 where R7 is C¿1-6?alkyl; R?4 and R5¿ are independently hydrogen, C¿1-6?alkyl, -CO2C1-6alkyl; and Y is N or CH.