Upper‐Rim Monofunctionalisation in the Synthesis of Triazole‐ and Disulfide‐Linked Multicalix[4]‐ and ‐[6]arenes
作者:William H. Gardiner、Matthew Camilleri、Luis A. Martinez‐Lozano、Sean P. Bew、G. Richard Stephenson
DOI:10.1002/chem.201804755
日期:2018.12.17
valued in supramolecular chemistry. This work reports an easy and versatile synthetic route to covalently linked double and triple calix[4]arene and calix[6]arenes by a novel DMF‐controlled selective alkylation of a convenient and readily available upper‐rim dimethylaminomethyl‐substituted tetrahydroxy and hexahydroxy calix[4]arene and ‐[6]arenes. Synthetic routes to upper‐rim functionalised redox active
Rhodium-catalyzed thiophosphinylation and phosphinylation reactions of disulfides and diselenides
作者:Mieko Arisawa、Tetsuya Ono、Masahiko Yamaguchi
DOI:10.1016/j.tetlet.2005.06.109
日期:2005.8
Alkyl and aryl dithiophosphinates were synthesized by the reaction of disulfides with biphosphine disulfides in the presence of RhH(PPh3)(4) and 1,2-diphenylphosphinoethane (dppe). The catalyst also promoted synthesis of thiophosphinates and selenothiophosphinates from disulfides and diselenides. (c) 2005 Elsevier Ltd. All rights reserved.
Rhodium-catalyzed alkylthio exchange reaction of thioester and disulfide
The Wilkinson complex RhCl(PPh3)(3) catalyzes equilibrating alkylthio exchange reaction of thioesters with disulfides. The treatment of a thioester and a dialkyl disulfide in refluxing diethyl ketone in the presence of RhCl(PPh3)(3) (2.5 mol %) for 1.5 h gave an alkylthio exchanged thioester. The reaction of S-methyl ester was conducted shifting the equilibrium by removing volatile dimethyl disulfide. (c) 2008 Elsevier Ltd. All rights reserved.