Copper-catalyzed selective syntheses of Markovnikov-type hydrothiolation products and thioacetals by the reactions of thiols with alkenes bearing heteroatoms
作者:Hui Xi、Enlu Ma、Zhiping Li
DOI:10.1016/j.tet.2016.05.050
日期:2016.7
Catalyst-controlled divergent reactions of thiophenols with alkenes bearing heteroatoms have been developed. Markovnikov-type hydrothiolation products and thioacetals were synthesized selectively by switching copper catalysts.
nickel-catalyzed oxidative dehydrogenative coupling reaction of alkane with thiol for the construction of C(sp3)-S bond has been established, affording more than 50 alkyl thioethers. Notably, pharmaceutical and agrochemicals, such as Provigil, Chlorbenside and Pyridaben, were readily synthesized by this approach. The sterically hindered ligand BC and disulfide which was formed in situ oxidation of thiol, efficiently
P4VPy–CuO nanoparticles were synthesized using ultrasound irradiations. Relevant properties of the synthesized nanoparticles were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Fourier transform infrared spectroscopy. After identification, the prepared reagent was used for the promotion of different types of protection reactions of alcohols, phenols and amines. Easy workup, short reaction times, excellent yields, relatively low cost and reusability of the catalyst are the striking features of the reported methods.
Efficient C−S Bond Formation by Direct Functionalization of C(
<i>sp</i>
<sup>3</sup>
)−H Bond Adjacent to Heteroatoms under Metal‐Free Conditions
作者:Feng Zhao、Qi Tan、Dahan Wang、Jinjin Chen、Guo‐Jun Deng
DOI:10.1002/adsc.201900666
日期:2019.9.3
A simple and efficient method for the formation of C−Sbond via directfunctionalization of C(sp3)−H bond adjacent to heteroatoms was described under metal‐free conditions. In this work, stable and easily accessible sodium sulfinates were used as the thiolating agents to afford various aryl thioethers in moderate to excellent yields. Mechanistic explorations show that a radical pathyway is possibly