介孔氮化碳光催化氧化苄基卤化物的反应

Photocatalytic Oxidation of Benzylic Halides with Mesoporous Carbon Nitride

在可见光促进下,以介孔氮化碳(mpg-C_(3)N_(4))作为可回收的光催化剂,Na_(2)CO_(3)作为添加剂,室温O_(2)氛围中,苄基卤化物氧化合成相应的芳基醛或酮及其衍生物(2a~2u),其结构经^(1)H NMR,^(13)C NMR和MS(ESI)表征。mpg-C_(3)N_(4)的结构经XRD,BET和紫外-可见漫反射光谱表征。以4-甲基氯苄(1a)作为模板反应,探究了催化剂、溶剂、反应时间和催化剂用量对反应的影响。在最优反应条件下,2a~2u收率可达63%~87%。通过催化剂稳定性实验发现催化剂可以稳定循环5次。

Development of an environmentally friendly and efficient strategy for the production of aromatic aldehyde or ketone derivatives(2a~2u)from benzylic halides.Mesoporous carbon nitride(mpg-C_(3)N_(4))was used as photocatalyst,and Na_(2)CO_(3)was used as additive in the O_(2)atmosphere.The structure of the product was confirmed by^(1)H NMR,^(13)C NMR and MS(ESI),and mpg-C_(3)N_(4)was characterized by XRD,BET and UV-visible diffuse reflection spectra.Taking 4-methylchlorobenzyl(1a)as a template reaction,the effects of catalyst,solvent,reaction time and amount of catalyst on the reaction were investigated.The results showed that under optimal conditions.The yield of 2a~2u were achieved 63%~87%.The catalyst stability experiment found that the catalyst can be stably circulated five times.