光化学合成α-溴代邻硝基乙苯的研究  

STUDY ON SYNTHESIS OFα-BROMO-o-NITROETHYLBENZENE BY PHOTOCHEMICAL REACTION

作　　者：刘焕梅[1] 

机构地区：[1]河北理工大学轻工学院,河北唐山063020

出　　处：《精细石油化工》2005年第4期13-15,共3页Speciality Petrochemicals

摘　　要：以乙苯为原料经硝化制得邻硝基乙苯,然后通过光化学反应进行溴代合成了光致保护剂α-溴代邻硝基乙苯.最佳反应条件为①硝化反应:温度25～30℃,反应时间2 h,邻硝基乙苯收率为32%;②光化学溴化反应:邻硝基乙苯/溴(摩尔比)=2:1,光照时间大于1 h,α-溴代邻硝基乙苯收率大于95%.利用1H NMR对其结构进行了验证.A photolabil protectiong reagentα-bromo-o-Nitroethylbenzene was synthesized first by nitri- ation of ethyl benzene and then by photochemical reaction with bromine.The optimal conditions were found as follows:①for nitration,the reaction temperature are 25-30℃,reaction time 2 h,the yield of o-nitroethylbenzene are 32%;②for photochemical bromination,the molar ratio of o-nitroethyl- benzen to bromine is 2:1,UV irradiation time more than 1 h,the yield ofα-bromo-o-nitroethyl- benzene are above 95 %.The synthesized compound were verified by ~1H NMR spectra.

关 键 词：乙苯 α-溴代邻硝基乙苯 光致保护剂 硝化 光化学溴化 

分 类 号：O625.612[理学—有机化学] TQ246.13[理学—化学]