3-[(1-cyano-7-cyclohexyloxy-4-hydroxy-isoquinoline-3-carbonyl)amino]-2,2-dimethylpropionic acid tert-butyl ester 在
Crude product 、
甲醇 作用下,
以
trifluoracetic acid-dichloromethane 为溶剂,
反应 3.0h,
以to provide the title compound 8.6 mg (0.02 mmol) in 18% yield的产率得到3-[(1-cyano-7-cyclohexyloxy-4-hydroxy-isoquinoline-3-carbonyl)amino]-2,2-dimethylpropionic acid