Sulfur‐Catalyzed Oxidative Coupling of Dibenzyl Disulfides with Amines: Access to Thioamides and Aza Heterocycles
作者:Thanh Binh Nguyen、Le Phuong Anh Nguyen、Thi Thu Tram Nguyen
DOI:10.1002/adsc.201801695
日期:2019.4.16
In the presence of catalytic amounts of elemental sulfur, dibenzyl disulfide/DMSO was found to be an excellent thiobenzoylating agent of amines to provide a wide range of thioamides. The reaction becomes autocatalytic when anilines substituted by an o‐cyclizable group were used as nucleophile, leading to the corresponding 2‐aryl aza heterocycles.
Antimicrobial activity of new benzazolyl N-sulfonyl amidines
作者:Nadezhda A. Galieva、Dmitriy A. Saveliev、Oleg S. Eltsov、Vasiliy A. Bakulev、Gert Lubec、Jihong Xing、Zhijin Fan、Tetyana V. Beryozkina
DOI:10.1016/j.mencom.2021.07.019
日期:2021.7
The reactions of N-(benz[d]oxazol-2-yl)- or N-(benzo[d]-thiazol-2-yl)-substituted carbothioamides with sulfonyl azides proceed as replacement of thioxo substituent by the sulfonylimino group to afford the corresponding N'-sulfonylated amidines. Aceticacid thioamides react smoothly upon boiling in ethanol, while for thioamides of trifluoroacetic and benzoic acids heating to 80–90 °C was required. Among
的反应ñ - (苯并[ d ]恶唑-2-基) -或ñ - (苯并[ d ] -噻唑-2-基) -取代的carbothioamides与磺酰叠氮化物进行如下置换硫代取代基的由磺酰基,得到相应的N'-磺酰化脒。乙酸硫代酰胺在乙醇中沸腾时反应平稳,而三氟乙酸和苯甲酸的硫代酰胺需要加热至 80-90°C。在由此制备的杂合分子中,发现了对金黄色葡萄球菌和白色念珠菌代表具有抑菌、杀菌和抑真菌活性。
Chemoselective Transamidation of Thioamides by Transition‐Metal‐Free N−C(S) Transacylation
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。