Controlling the Catalytic Aerobic Oxidation of Phenols
作者:Kenneth Virgel N. Esguerra、Yacoub Fall、Laurène Petitjean、Jean-Philip Lumb
DOI:10.1021/ja501789x
日期:2014.5.28
The oxidation of phenols is the subject of extensive investigation, but there are few catalyticaerobic examples that are chemo- and regioselective. Here we describe conditions for the ortho-oxygenation or oxidative coupling of phenols under copper (Cu)-catalyzed aerobic conditions that give rise to ortho-quinones, biphenols or benzoxepines. We demonstrate that each product class can be accessed selectively
酚类的氧化是广泛研究的主题,但很少有具有化学和区域选择性的催化需氧实例。在这里,我们描述了在铜 (Cu) 催化的有氧条件下苯酚的正氧化或氧化偶联的条件,这些条件会产生邻醌、双酚或苯并氧杂环庚烷。We demonstrate that each product class can be accessed selectively by the appropriate choice of Cu(I) salt, amine ligand, desiccant and reaction temperature. 此外,我们评估了取代基对苯酚的影响,并证明了它们对原氧化和氧化偶联途径之间选择性的影响。
PHOSPHITE COMPOUND, METHOD FOR PRODUCING THE SAME AND USES THEREOF
申请人:Sumitomo Chemical Company, Ltd.
公开号:EP3260461A1
公开(公告)日:2017-12-27
The present invention relates to a novel phosphite compound represented by the formula (I):
wherein R1, R2, R3 and R4 each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or an aryl group having 6 to 12 carbon atoms, a process for producing the same, and uses thereof as a stabilizer for an organic material.
Armstrong, David R.; Cameron, Colin.; Nonhebel, Derek C., Journal of the Chemical Society. Perkin transactions II, 1983, p. 587 - 590
作者:Armstrong, David R.、Cameron, Colin.、Nonhebel, Derek C.、Perkins, Peter G.
DOI:——
日期:——
Oxidative coupling of dichloroaluminium phenolates: Highly selective synthesis of hydroxylated Bi- and tetraaryls
作者:Giovanni Sartori、Raimondo Maggi、Franca Bigi、Attilio Arienti、Giuseppe Casnati、Gabriele Bocelli、Giovanni Mori
DOI:10.1016/s0040-4020(01)88316-2
日期:1992.1
Dichloroaluminium phenolates 4 undergo highly selective FeCl3-promoted oxidative coupling. Variously substituted symmetric 2,2'-dihydroxy biaryls 2 are obtained in good yields and excellent selectivities. The chelation control in the final reaction products 7 promotes the chemoselectivity of the process.
Autoxidation of phenols catalyzed by copper(II)-ethylenediamine complexes: the reaction mechanism