the direct synthesis of 3-sulfanylindoles from indoles and thiols under an atmospheric pressure of molecular oxygen as a reoxidant. For example, the reaction of 2-phenylindole with benzenethiol in the presence of a catalytic amount of VO(acac)2, potassium iodide, and 2,6-di-tert-butyl-p-cresol in chlorobenzene under molecular oxygen proceeds to afford 2-phenyl-3-(phenylsulfanyl)indole in 86% yield
Copper-Mediated C–H Activation/C–S Cross-Coupling of Heterocycles with Thiols
作者:Sadananda Ranjit、Richmond Lee、Dodi Heryadi、Chao Shen、Ji’En Wu、Pengfei Zhang、Kuo-Wei Huang、Xiaogang Liu
DOI:10.1021/jo2017444
日期:2011.11.4
oles by directthiolation of benzothiazoles with aryl or alkyl thiols via copper-mediated aerobic C–H bond activation in the presence of stoichiometric CuI, 2,2′-bipyridine and Na2CO3. We also show that the approach can be extended to thiazole, benzimidazole, and indole substrates. In addition, we present detailed mechanistic investigations on the Cu(I)-mediated directthiolationreactions. Both computational
我们报告了在化学计量的CuI,2,2'-联吡啶存在下,通过铜介导的需氧C–H键活化,通过苯并噻唑与芳基或烷基硫醇的直接硫醇化反应,合成了一系列芳基或烷基取代的2-巯基苯并噻唑和Na 2 CO 3。我们还表明该方法可以扩展到噻唑,苯并咪唑和吲哚底物。此外,我们目前对Cu(I)介导的直接硫醇化反应的详细机理研究。计算研究和实验结果均表明,铜-硫醇盐络合物[(L)Cu(SR)](L:基于氮的双齿配体,例如2,2'-联吡啶; R:芳基或烷基)是第一反应性负责观察到的有机转化的中间体。此外,我们的计算研究表明,基于氢原子提取途径的逐步反应机理,比包括β-氢化物消除,单电子转移,氢原子转移,氧化加/还原消除和σ在内的许多其他可能途径在能量上更可行。键易位。
Visible-light promoted synthesis of 3-arylthioindoles from indoles and diaryl disulfides
作者:Lin-miao Ye、Jie Chen、Peng Mao、Xue-jing Zhang、Ming Yan
DOI:10.1016/j.tetlet.2017.05.090
日期:2017.7
3-Arylthioindoles could be synthesized in good yields via the photoirradiation of indoles and disulfides. The reaction is efficiently promoted by the catalytic amount of sodium iodide. A reactionmechanism involving the electrophilic substitution of indoles with arylsulfenyl iodine intermediates is suggested.
An efficient metal-freesulfenylation of indoles with disulfides has been developed, leading to 3-arylthioindoles in moderate to excellent yields. Furthermore, bromosulfenylation of indoles with disulfides has been realized for the first time providing a new family of 2-bromo-3-arylthioindole derivatives in good yield by the one-pot construction of CS and CBr bonds. It is noteworthy that the system