Latent Brønsted Base Solvent-Assisted Amide Formation from Amines and Acid Chlorides
作者:Rikuto Otsuka、Kazuo Maruhashi、Tomohiko Ohwada
DOI:10.1055/s-0037-1609342
日期:2018.5
Weakly basic amines, including even neutral amines such as nitroaniline and aminocarboxylic acids, react with acid chlorides very efficiently in N,N-dimethylacetamide (DMAC), without addition of a base, to give the corresponding amides in high yields. The role of DMAC and related solvents as latent Brønsted bases was studied in these amidation reactions. Less basic amines, such as aromatic amines, reacted
摘要 弱碱性胺(甚至包括中性胺,如硝基苯胺和氨基羧酸)在N,N-二甲基乙酰胺(DMAC)中与酰氯非常有效地反应,而无需添加碱,从而以高收率得到相应的酰胺。在这些酰胺化反应中,研究了DMAC和相关溶剂作为潜在的布朗斯台德碱的作用。碱性较低的胺(例如芳族胺)与苯甲酰氯的反应比碱性较高的脂族胺反应更快。 弱碱性胺(甚至包括中性胺,如硝基苯胺和氨基羧酸)在N,N-二甲基乙酰胺(DMAC)中与酰氯非常有效地反应,而无需添加碱,从而以高收率得到相应的酰胺。在这些酰胺化反应中,研究了DMAC和相关溶剂作为潜在的布朗斯台德碱的作用。碱性较低的胺(例如芳族胺)与苯甲酰氯的反应比碱性较高的脂族胺反应更快。