(+/-)-6-bromo-5-chloro-1,4-dihydro-2,2,4,8-tetramethyl-2H-quinolin-3-one 、
1-溴-3-甲基-2-丁烯 以to afford (±)-6-bromo-5-chloro-4-(3,3-dimethylallyl)-1,4-dihydro-2,2,4,8-tetramethyl-2H-quinolin-3-one的产率得到(+/-)-6-bromo-5-chloro-4-(3,3-dimethylallyl)-1,4-dihydro-2,2,4,8-tetramethyl-2H-quinolin-3-one