saturated monobasic carboxylic acids with functionally substituted primary aromatic amines (3-amino-2-naphthol, benzo[d]thiazol-2-amine, and 4,4′-oxydianiline) with TaCl5 (0.2 equiv.) were found to be accompanied by the selective formation of carboxylic acid amides of various structures. A mechanism for the amidation of carboxylic acids in the presence of TaCl5 was proposed.
发现饱和一元
羧酸与功能取代的芳香
伯胺(
3-氨基-2-萘酚、苯并[ d ]
噻唑-2-胺和4,4'-
二苯胺)与TaCl 5 (0.2当量)的反应伴随着各种结构的
羧酸酰胺的选择性形成。提出了在 TaCl 5存在下
羧酸酰胺化的机理。