Aerobic Visible‐Light Induced Intermolecular S−N Bond Construction: Synthesis of 1,2,4‐Thiadiazoles from Thioamides under Photosensitizer‐Free Conditions
作者:Liang Zhuo、Shihua Xie、Hui Wang、Hongjun Zhu
DOI:10.1002/ejoc.202100440
日期:2021.6.21
A green approach for S−Nconstruction with concomitant synthesis of1,2,4-thiadiazoles was developed by visible-light induced oxidative cyclization of thioamidesunder photosensitizer-free conditions.
Eosin Y Catalyzed Visible-Light-Driven Aerobic Oxidative Cyclization of Thioamides to 1,2,4-Thiadiazoles
作者:Lal Yadav、Vishnu Srivastava、Arvind Yadav
DOI:10.1055/s-0032-1318158
日期:——
A new approach for an efficient metal-free synthesis of 1,2,4-thiadiazoles from primary thioamides using visible light and air in the presence of eosin Y as a photoredox catalyst is reported. The protocol involves an aerobic oxidative cyclization of thioamides via the formation of C–N and C–S bonds to afford excellent yields of the products in a simple one-pot operation under mild conditions.
报道了一种在曙红 Y 作为光氧化还原催化剂的情况下,使用可见光和空气从伯硫代酰胺高效无金属合成 1,2,4-噻二唑的新方法。该方案涉及通过形成 C-N 和 C-S 键对硫代酰胺进行有氧氧化环化,以在温和条件下的简单一锅操作中提供优异的产品收率。
An Unexpected Result of the Reaction of Benzothioamide Derivatives with 2-Aryl-2-bromoacetonitriles
作者:Hassan Zali Boeini、Mehdi Mobin
DOI:10.1002/hlca.201100110
日期:2011.11
Unexpectedly, in the reaction of 2‐bromo‐2‐phenylacetonitrile derivatives with 2 mol‐equiv. of benzothioamide in DMSO, 3,5‐diaryl‐1,2,4‐thiadiazoles were obtained in excellent yields (83–90%) and in short reaction times (5–10 min). It is found that, in DMF, a quite different reaction takes place and 2,5‐diaryl‐1,3‐thiazol‐4‐amines are formed as the main products.
HYPERVALENT IODINE IN SYNTHESIS. 84. FACILE SYNTHESIS OF 3,5-DISUBSTITUTED 1,2,4-THIADIAZOLES BY OXIDATIVE DIMERIZATION OF THIOAMIDES USING POLYMER-SUPPORTED IODOBENZENE DIACETATE
作者:Dong-Ping Cheng、Zhen-Chu Chen
DOI:10.1081/scc-120005423
日期:2002.1.1
ABSTRACT A facilesynthesis of 3,5-disubstituted 1,2,4-thiadiazoles by oxidative dimerization of thioamides using polymer-supported iodobenzenediacetate has been reported.
Electrochemical Synthesis of 3,5‐Disubstituted‐1,2,4‐thiadiazoles through NH
<sub>4</sub>
I‐Mediated Dimerization of Thioamides
作者:Zi‐Qiang Wang、Xiu‐Jin Meng、Qian‐Yu Li、Hai‐Tao Tang、Heng‐Shan Wang、Ying‐Ming Pan
DOI:10.1002/adsc.201800871
日期:2018.11.5
A electrochemical method for the synthesis of 3,5‐disubstituted‐1,2,4‐thiadiazoles through NH4I‐mediated dimerization of thioamides is reported. Using the inexpensive NH4I as electrolyte and catalyst, this electrosynthesis approach requires no oxidizing agents and enables the convenient production of diverse 1,2,4‐thiadiazoles products. The approach is an example of S−N bond construction through the