6-benzyl-2-chloro-8,8-dimethyl-5,6,7,8-tetrahydro-1,6-naphthyridine 、
(S)-(+)-2-丁醇 以8,8-dimethyl-2-[(1S)-1-methylpropoxy]-5,6,7,8-tetrahydro-1,6-naphthyridine hydrochloride (0.115 g, 31%) was obtained as a white powder的产率得到8,8-dimethyl-2-[(1S)-1-methylpropoxy]-5,6,7,8-tetrahydro-1,6-naphthyridine hydrochloride