Novel catalytic bromolactonization of alkenoic acids using iodobenzene and Oxone?

摘要

The novel catalytic reaction for bromolactonization of alkenoic acids is reported. When iodobenzene is used as recyclable catalyst in combination with Oxone? as terminal oxidant, the cyclization of various 4-pentenoic acids with sodium bromide is easily carried out in CF_3CH_2OH at room temperature and giving five-membered bromolactones in good yields.