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.
一种制备5-[(R)-2-(5,6-
二乙基-
茚-2-基
氨基)-1-羟基乙基]-8-羟基-(1H)-
喹啉-2-酮盐的方法。该方法涉及形成5-[(R)-2-(5,6-
二乙基-
茚-2-基
氨基)-1-羟基乙基]-8-取代氧基-(1H)-
喹啉-2-酮(V)的酸盐,并将酸盐转化为5-[(R)-2-(5,6-
二乙基-
茚-2-基
氨基)-1-羟基乙基]-8-羟基-(1H)-
喹啉-2-酮(VI)的盐,而无需分离5-[(R)-2-(5,6-
二乙基-
茚-2-基
氨基)-1-羟基乙基]-8-羟基-(1H)-
喹啉-2-酮的自由碱。公式(A);(V):R = 保护基,(VI):R = H。