lanthanide catalysts showed high catalytic activity and a wide scope of substrates with good to excellent yields under solvent‐freeconditions. Efficient activation of the transamidation can be realized by the above complexes acting as cooperative acid–base bifunctional catalysts, which are proposed to be responsible for the higher reactivity in comparison with simple monometallic catalysts.
for transamidation of thioamides by N−C(S) transacylation is reported. This process exploits the concept of site-selective N-tert-butoxycarbonyl activation, resulting in ground-state-destabilization of thioamides. The study establishes a powerful direction to the development of new molecules in chemistry and biology by rational modification of nN→π*C=S resonance of the thioamide bond.
报道了第一种通过 NC(S) 转酰基作用对硫代酰胺进行转酰胺基作用的通用、温和且高度化学选择性的方法。该过程利用了位点选择性 N-叔丁氧羰基活化的概念,导致硫代酰胺的基态不稳定。该研究通过对硫代酰胺键的n N →π* C=S共振进行合理修饰,为化学和生物学新分子的发展奠定了有力的方向。
Direct Transamidation of Thioamides with Amines via Acetophenone-Promoted Enamine Catalysis under Metal-Free Conditions
selective, efficient, and simple method for direct transamidation of thioamides with amines, promoted by commercially available acetophenone under metal-/solvent-free conditions. The reaction tolerated a wide range of functional groups and substrates, including single- or double-thioamides, benzylamines, or alkyl/cycloalkyl-substituted aliphatic amines. The present protocol can be applied to gram-scale in