Potassium fluoride impregnated on natural zeolite as a new solid base system effectively catalyzes the coupling
of thiophenols with electron-deficient fluoro-, chloro- and bromo-arenes in DMSO. This versatile and efficient solid base
has been demonstrated to afford the corresponding desired products in good to excellent yields. This procedure provides a
convenient, efficient and practical method for the preparation of diaryl thioethers.
A reusable FeCl3·6H2O/cationic 2,2′-bipyridyl catalytic system for the coupling of aryl iodides with thiols in water under aerobic conditions
作者:Wei-Yi Wu、Jui-Chan Wang、Fu-Yu Tsai
DOI:10.1039/b820790a
日期:——
In this study, an FeCl3·6H2O/cationic 2,2â²-bipyridyl system was employed as a catalyst in the coupling of aryl iodides with thiols to form an arylâsulfur bond in refluxed water under aerobic conditions. The residual aqueous solution after extraction could be reused for several cycles without a significant decrease in activity.
作者:Bandna、Nitul Ranjan Guha、Arun K. Shil、Dharminder Sharma、Pralay Das
DOI:10.1016/j.tetlet.2012.07.096
日期:2012.9
Ligand-free solid-supported nano and microparticles of Pd(0) (SS-Pd) were used as a heterogeneous catalyst in carbon-heteroatom bond formation reactions. Nitro substituted aryl halides reacted with oxygen, sulfur, and nitrogen nucleophiles to afford the corresponding products in good yields. A one-pot sequential cross coupling and nitro-reduction was also performed using the same SS-Pd catalyst to
Microwave-assisted Ullmann-Buchwald C-S bond formation using a copper(I) catalyst and trans-cyclohexane-1,2-diol as ligand
作者:Mark C. Bagley、Vincenzo Fusillo、Edward G. B. Hills、Alex T. Mulholland、Joseph Newcombe、Leanne J. Pentecost、Emily L. Radley、Bethan R. Stephens、Christopher C. Turrell
DOI:10.3998/ark.5550190.0013.720
日期:——
aryl halide (1 equiv.) in 2propanol at 120 °C for three hours in the presence of K2CO3 (2 equiv.) as base usingcopper(I) iodide as catalyst (5 mol%) and trans-cyclohexane-1,2-diol (2 equiv.) as ligand provides a rapid and convenient method for C−Sbondformation. The process is most efficient using thiophenol and aryl iodide precursors, both of which may contain electron-donating and electronwithdrawing
Convenient MW-Assisted Synthesis of Unsymmetrical Sulfides Using Sulfonyl Hydrazides as Aryl Thiol Surrogate
作者:Neetu Singh、Rahul Singh、Dushyant S. Raghuvanshi、Krishna Nand Singh
DOI:10.1021/ol402948k
日期:2013.11.15
An efficient synthesis of unsymmetricalsulfides has been achieved via the cross-coupling reaction of aryl/het-aryl/benzyl halides with stable and easily workable sulfonyl hydrazides as thiol substitutes by means of [DBU][HOAc] and CuI under microwave irradiation.