PROCESS FOR PREPARING 5-'(R)-2-(5,6-DIETHYL-INDIAN-2-YLAMINO)-1-HYDROXY-ETHYL!-8-HYDROXY-(1H)-QUINOLIN-2-ONE SALT, USEFUL AS AN ADRENOCEPTOR AGONIST

摘要

A process for preparing 5-[(R)-2-(5,6-diethyl-indan-2-ylamino)-1-hydroxy-ethyl]-8-hydroxy-(1H)-quinolin-2-one salt. The process involves forming an acid salt of 5-[(R)-2-(5,6-diethyl-indan-2-ylamino)-1-hydroxy-ethyl]-8-substituted oxy-(1 H)-quinolin-2-one (V); and converting the acid salt to a salt of 5-[(R)-2-(5,6-diethyl-indan-2-ylamino)-1-hydroxy-ethyl]-8-hydroxy-(1H)-quinolin-2-one (VI) without isolating the free base of 5-[(R)-2-(5,6-diethyl-indan-2-ylamino)-1-hydroxy-ethyl]-8-hydroxy-(1H)-quinolin-2-one. Formula (A); (V): R = a protecting group, (VI): R = H.