derivatives are reduced by an acid-stable NADH model compound, 9,10-dihydro-10-methylacridine, in the presence of HClO4 in acetonitrile at 335 K to yield 10-methylacridinium ion and the parent acetophenone derivatives as well as halohydrins, while the reduction of 2-haloacetophenone derivatives in the presence of TiCl4 in dichloromethane undergoes much more readily even at 298 K to yield the corresponding
                                    2-卤代
苯乙酮衍
生物被酸稳定的 
NADH 模型化合物 9,10-二氢-10-甲基
吖啶还原,在 HClO4 存在下,在 335 K 的
乙腈中生成 10-甲基
吖啶离子和母体
苯乙酮衍
生物以及卤代醇,而在
二氯甲烷中 TiCl4 存在下 2-卤代
苯乙酮衍
生物的还原即使在 298 K 下也更容易发生,以选择性地产生相应的卤代醇。