An efficient and selective multicomponent oxidative coupling of two different aliphaticprimaryamines into thioamides by elemental sulfur under solvent-free conditions has been developed.
在无溶剂条件下,已经开发出两种不同的脂肪族伯胺通过元素硫高效选择性地氧化偶联成硫酰胺的方法。
Fast Construction of 1,3-Benzothiazepines by Direct Intramolecular Dehydrogenative C–S Bond Formation of Thioamides under Metal-Free Conditions
作者:Wei-Si Guo、Hao Gong、Yan-An Zhang、Li-Rong Wen、Ming Li
DOI:10.1021/acs.orglett.8b02697
日期:2018.10.19
The first general protocol for the synthesis of 1,3-benzothiazepine derivatives was established. With the aid of bench-stable hypervalent iodine promoter fluoro-HTIB, these seven-membered heterocycles can be rapidly synthesized from readily available thioamides under air atmosphere and metal-freeconditions. The transformation can be completed within 1 min at room temperature and features a broad substrate
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