"Process for the preparation of aryl ethanol amine derivatives having anti - obesity and anti diabetic properties". a process for preparing a compound of formula (ia) or a pharmaceutically acceptable salt thereof； where R2 is an aryl, pyridyl, thiazolyl, phenoxy methyl, or pyrimidyl group, optionally substituted with one or more substituents selected from the group consisting of halogen, hydroxy, C1-6 alkoxy, C1-6 alkyl -, hydroxy methyl, trifluoromethyl, -nr4-6-6-6, and -nhso-2-6-6-6, wherein each R2-6 is independently hydrogen, or C1-4-alkyl； R2 is hydrogen or C1-6 alkyl； R ^ 3 ^ is co-2 ~ R ^ 7 ^ where r ^ 7 ^ is hydrogen or C 1-6 alkyl； R4 and R5 are independently hydrogen, C1-6 alkyl, or -co2-6 C1-6 alkyl； and y is n or ch comprising the step of preparing a diamide of formula (ii) or a pharmaceutically acceptable salt thereof； where R2 is an aryl, pyridyl, thiazolyl, phenoxy methyl, or pyrimidyl group, optionally substituted with one or more substituents selected from the group consisting of halogen, hydroxy, C1-6 alkoxy, C1-6 alkyl -, hydroxy methyl, trifluoromethyl, -nr4-6-6-6, and -nhso-2-6-6-6, wherein each R2-6 is independently hydrogen, or C1-4-4 alkyl； R2 is hydrogen or C1-6 alkyl； r ^ 3 ^ is co-2 ~ r ^ 7 ^ where r ^ 7 ^ is C 1-6 alkyl； R 4 and R 5 are independently hydrogen, C 1-6 alkyl, C 2 -C 6 alkyl； and y is n or ch."processo para a preparação de derivados de aril etanol amina tendo propriedades anti - obesidade e anti diabéticas". processo para a preparação de um composto de fórmula (ia) ou um seu sal farmaceuticamente aceitável； onde r^ 1^ é um grupo arila, piridila, tiazolila, fenoxi metila, ou pirimidila, opcionalmente substituído com um ou mais substituintes selecionados do grupo consistindo em halogênio, hidroxi, alcoxi c~ 1-6~, alquila c~ 1-6~, hidroxi metila, triflúor metila, -nr^ 6^r^ 6^, e -nhso~ 2~r^ 6^, onde cada r^ 6^ é independentemente hidrogênio, ou alquila c~ 1-4~； r^ 2^ é hidrogênio ou alquila c~ 1-6~； r^ 3^ é co~ 2~r^ 7^ onde r^ 7
