Hydrogen-Borrowing and Interrupted-Hydrogen-Borrowing Reactions of Ketones and Methanol Catalyzed by Iridium
作者:Di Shen、Darren L. Poole、Camilla C. Shotton、Anne F. Kornahrens、Mark P. Healy、Timothy J. Donohoe
DOI:10.1002/anie.201410391
日期:2015.1.26
use of catalytic [Ir(cod)Cl}2] to facilitate hydrogen‐borrowing reactions of ketone enolates with methanol at 65 °C. An oxygen atmosphere accelerates the process, and when combined with the use of a bulky monodentate phosphine ligand, interrupts the catalytic cycle by preventing enone reduction. Subsequent addition of pro‐nucleophiles to the reaction mixture allowed a one‐pot methylenation/conjugate
本文报道了在65°C下使用催化[Ir(cod)Cl} 2 ]促进酮烯醇盐与甲醇的氢借入反应。氧气气氛加速了该过程,当与庞大的单齿膦配体结合使用时,可通过阻止烯酮还原来中断催化循环。随后向反应混合物中添加亲核试剂,可以开发出一锅的亚甲基化/共轭加成方案,这极大地扩展了该方法可以制备的产物的范围。