The preparation of 4-bromobenzaldehyde was achieved by 4-bromotoluene and molecular bromine in CCl_4 in the presence of La(Ac)_3 and subsequent Sommelet reaction.

• 研究了在乙酸镧催化下,对溴甲苯和液溴在四氯化碳中光照溴化、六次甲基四胺处理制备4-溴苯甲醛的方法。