光催化
胺化
脱氢
半胺
绿色化学
化学
酰胺
还原胺化
选择性
有机化学
组合化学
催化作用
反应机理
作者
Lanqing Deng,Lang Chen,Liangdi Zhu,Yang Li,Jie Ouyang,Shaofeng Wu,Peng Chen,Sheng Shen,Jun‐Kang Guo,Yongbo Zhou,Chak‐Tong Au,Shuang‐Feng Yin
标识
DOI:10.1016/j.ces.2022.117960
摘要
Being extensively applied in various fields of chemistry and chemical industry, the development of a green and versatile method for the synthesis of amides is in line with the demand of sustainable chemistry. Herein, a direct, highly selective, and scale-up (5–20 mmol) method for photocatalytic synthesis of amides through aerobic oxidative amination of alcohols with amines was developed under visible light, room temperature, using air as the oxidant. Benefiting from the adsorption of sodium hemiaminal on catalyst lengthens the CH bond (1.148 Å), this novel process is feasible for a broad range of functionlized amides (69 examples), especially those for drug manufacture (e.g., moclobemide and pipobroman). Imines was almost prevented with excellent amide selectivity up to 99 % could be ascribed to the low energy barrier for hemiaminal dehydrogenation while that for dehydration is high (2.13 eV). This green and efficient protocol represents an ideal alternative to the currently known methods.
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