Synthesis of 4‐halo‐2 (5H)‐furanones and their suzuki‐coupling reactions with organoboronic acids. A general route to 4‐aryl‐2 (5 H) ‐furanones

4‐Halo‐2(5H)‐furanones were prepared by the halolactonization of 2,3‐allenoic acids. The subsequent Suzuki coupling reaction of 4‐halo 2(5H)‐furanones with aryl boronic acids was carried out to produce 4‐aryl‐2(5H)‐furanones in excellent yields.     

烯酸在碘化铵催化作用下的卤代内酯化反应

研究了不饱和烯酸在碘化铵催化作用下的溴代和氯代内酯化反应.通过该反应,4-戊烯酸等不饱和烯酸在催化剂碘化铵和氧化剂间氯过氧苯甲酸作用下很容易与溴化锂和氯化锂反应,常温下短时间内即可得到良好产率的溴/氯甲基γ-丁内酯化合物,从而建立了一个简单快速合成溴/氯甲基γ-丁内酯的新方法.考察了反应条件对反应的影响,提出了该反应是经过有机高价碘中间体而进行的反应机理.