(2S,4R)-2-ethyl-6-methoxy-4-[(S)-1-phenylethoxycarbonylamino]-3,4-dihydro-2H-[1,5]naphthyridine-1-carboxylic acid ethyl ester 在
钯 氢气 、
钯 作用下,
以
乙醇 为溶剂,
反应 3.0h,
以to give (2S,4R)-4-amino-2-ethyl-6-methoxy-3,4-dihydro-2H-[1,5]naphthyridine-1-carboxylic acid ethyl ester (619 mg)的产率得到(2S,4R)-4-amino-2-ethyl-6-methoxy-3,4-dihydro-2H-[1,5]naphthyridine-1-carboxylic acid ethyl ester