Rapid Formation of Fluoren-9-ones via Palladium-Catalyzed External Carbon Monoxide-Free Carbonylation
作者:Hideyuki Konishi、Suguru Futamata、Xi Wang、Kei Manabe
DOI:10.1002/adsc.201800155
日期:2018.5.2
carbonylation reaction for the synthesis of fluoren‐9‐ones from 2‐halogenated biphenyls using phenyl formate as a carbon monoxide surrogate was achieved. The combined use of cesium carbonate and o‐anisic acid resulted in a remarkable rate enhancement, where the reaction was complete within 3 min in some cases. Mechanistic studies indicated that the turnover‐limiting step of the reaction was the C−H bond‐cleaving
在甲酸苯酯作为一氧化碳替代物的条件下,实现了钯催化的羰基化反应,由2-卤代联苯合成氟-9-酮。碳酸铯和邻茴香酸的组合使用可显着提高速率,在某些情况下,反应可在3分钟内完成。机理研究表明,取决于所用的底物,反应的周转限制步骤是CH键裂解步骤或氧化加成步骤。