Synthesis of 3-Carbonyl Trisubstituted Furans via Pd-Catalyzed Aerobic Cycloisomerization Reaction: Development and Mechanistic Studies
作者:Amanda A. Barboza、Attilio Chiavegatti Neto、Isac G. Rosset、Guilherme A. M. Jardim、Marco A. B. Ferreira
DOI:10.1021/acs.joc.0c02777
日期:2021.3.5
we report the synthesis of 3-carbonyl-trisubstituted furans via Pd-catalyzed oxidative cycloisomerization reactions of 2-alkenyl-1,3-dicarbonyl scaffolds, using molecular oxygen as the sole oxidant to regenerate active palladium catalytic species, featuring good functional tolerance and mild reaction conditions. Deep investigation of intermediates and transition states of the reaction mechanism were
在本文中,我们报告了通过Pd催化2-烯基-1,3-二羰基支架的Pd催化氧化环异构化反应合成3-羰基三取代的呋喃,使用分子氧作为唯一氧化剂再生活性钯催化物种,具有良好的功能耐受性和温和的反应条件。通过实验和DFT研究对反应机理的中间体和过渡态进行了深入研究,从而提供了详细的机械特性。新开发的方法为Wacker型环异构化提供了一种更绿色的替代方法,并且避免了使用化学计量的氧化剂和强酸添加剂。