7-Benzyloxy-6-chloro-2-[4-cyano-4-(6-fluoro-pyridin-3-ylmethyl)-piperidine-1-carbonyl]-2,3-dihydro-benzo[1,4]oxazine-4-carboxylic acid tert-butyl ester 在
钯 Si 、
methanol-dichloromethane 作用下,
以
乙酸乙酯 为溶剂,
反应 5.0h,
以afforded 200 mg (78%) of 6-Chloro-2-[4-cyano-4-(6-fluoro-pyridin-3-ylmethyl)-piperidine-1-carbonyl]-7-hydroxy-2,3-dihydro-benzo[1,4]oxazine-4-carboxylic acid tert-butyl ester的产率得到6-Chloro-2-[4-cyano-4-(6-fluoro-pyridin-3-ylmethyl)-piperidine-1-carbonyl]-7-hydroxy-2,3-dihydro-benzo[1,4]oxazine-4-carboxylic acid tert-butyl ester