6-[2-(R)-[2-(S)-hydroxy-3-[3-methanesulfonamido-5-methoxy-4-(methoxymethoxy)phenoxy]propylamino]propyl]-2,3-dihydro-1,4-benzodioxine-2-(R)-carboxylic acid ethyl ester 在
盐酸 作用下,
以
乙醇 、
乙酸乙酯 为溶剂,
反应 16.0h,
以85%的产率得到6-[2-(R)-[2-(S)-hydroxy-3-(4-hydroxy-3-methanesulfonamido-5-methoxyphenoxy)propylamino]propyl]-2,3-dihydro-1,4-benzodioxine-2-(R)-carboxylic acid ethyl esterester