5,6,7,8-Tetrahydro-8-hydroxy-3-methylchinolin 、
氯化亚砜 在
乙醇 、
氯化亚砜 、 resultant precipitate 作用下,
反应 4.0h,
以to give 8-chloro-3-methyl-5,6,7,8-tetrahydroquinoline hydrochloride as colourless needles (17.4 g.) m.p. 177° C.的产率得到8-chloro-3-methyl-5,6,7,8-tetrahydroquinoline hydrochloride