8-{2-[1,1-dimethyl-2-(4-hydroxy-phenyl)-ethylamino]-1-hydroxy-ethyl}-6-benzyloxy-4H-benzo[1,4]oxazin-3-one hydrochloride 在
5%-palladium/activated carbon
氢气 作用下,
以
甲醇 为溶剂,
以72%的产率得到6-hydroxy-8-{1-hydroxy-2-[2-(4-hydroxy-phenyl)-1,1-dimethyl-ethylamino]-ethyl}-4H-benzo[1,4]oxazin-3-one hydrochloride