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以氮掺杂石墨烯-二氧化钛(TiO2-NGs)为可见光催化剂,在无水无氧条件下使羧酸脱羧与缺电子烯烃类化合物之间形成C—C键。当苯氧乙酸与马来酸酐反应时,可合成苯并吡喃衍生物。此方法简单易操作,试剂价廉易得,催化剂可过滤分离,重复使用,为合成此类化合物提供了一种新的有效途径。
With nitrogen-doped graphene-titania (TiO2-NGs) as a visible light catalyst, the carboxylic acid is decarboxylated with an electron deficient olefin to form a C-C bond under anhydrous and oxygen-free conditions. When phenoxyacetic acid is reacted with maleic anhydride, benzopyran derivatives can be synthesized. The method is simple and easy to operate, the reagent is cheap and easy to be obtained, the catalyst can be filtered and separated and reused, and provides a new effective way for synthesizing the compound.