Radical condensation between benzylic alcohols and acetamides to form 3-arylpropanamides
作者:Kobra Azizi、Robert Madsen
DOI:10.1039/d0sc02948c
日期:——
A new radical condensation reaction is developed where benzylic alcohols and acetamides are coupled to generate 3-arylpropanamides with water as the only byproduct. The transformation is performed with potassium tert-butoxide as the only additive and gives rise to a variety of 3-arylpropanamides in good yields. The mechanism has been investigated experimentally with labelled substrates, trapping experiments
开发了一种新的自由基缩合反应,其中将苄醇和乙酰胺偶联以生成3-芳基丙酰胺,而水是唯一的副产物。用叔丁醇钾作为唯一添加剂进行转化,并以高收率产生各种3-芳基丙酰胺。已通过标记底物,捕获实验和光谱测量对这种机理进行了实验研究。研究结果表明自由基途径,其中钾叔据信-丁醇盐起碱和自由基引发剂的双重作用。提出了苄醇的自由基阴离子作为关键中间体,该中间体与酰胺的烯酸酯进行偶联形成新的C–C键。随后消除为相应的肉桂酰胺,然后烯烃还原得到3-芳基丙酰胺。