A Fast and General Route to Ketones from Amides and Organolithium Compounds under Aerobic Conditions: Synthetic and Mechanistic Aspects
作者:Simone Ghinato、Davide Territo、Andrea Maranzana、Vito Capriati、Marco Blangetti、Cristina Prandi
DOI:10.1002/chem.202004840
日期:2021.2.5
We report that the nucleophilic acyl substitution reaction of aliphatic and (hetero)aromatic amides by organolithium reagents proceeds quickly (20 s reaction time), efficiently, and chemoselectively with a broad substrate scope in the environmentally responsible cyclopentyl methyl ether, at ambient temperature and under air, to provide ketones in up to 93 % yield with an effective suppression of the
我们报道,脂肪族和(杂)芳族酰胺通过有机锂试剂的亲核酰基取代反应进行迅速(20 s反应时间),有效地进行,并且在环境温度和环境温度下,在对环境负责的环戊基甲基醚中具有广泛的底物范围进行化学选择性空气,以提供高达93%的产率的酮,并有效抑制臭名昭著的加成反应。详细的DFT计算和NMR研究支持了实验结果。事实证明,所描述的方法适用于规模扩大和可回收性协议。与在惰性气氛下进行的经典程序相反,这项工作为羧酸酰胺与有机锂的反应性发生深刻的范式转变奠定了基础,