25748-85-0Relevant articles and documents
Styrene Production from Benzene and Ethylene Catalyzed by Palladium(II): Enhancement of Selectivity toward Styrene via Temperature-dependent Vinyl Ester Consumption
Jia, Xiaofan,Foley, Aisling M.,Liu, Chang,Vaughan, Benjamin A.,McKeown, Bradley A.,Zhang, Sen,Gunnoe, T. Brent
supporting information, p. 3532 - 3541 (2019/09/12)
Oxidative ethylene hydrophenylation catalyzed by palladium(II) acetate with Cu(II) oxidants to produce styrene generally suffers from low selectivity and/or low yield. Commonly observed side products include vinyl carboxylates and stilbene. In this Article, the selectivity for styrene formation by Pd(OAc)2 is studied as a function of reaction temperature, ethylene pressure, Br?nsted acid additive, Cu(II) oxidant amount, and oxygen pressure. Under optimized conditions, at high temperatures (180 °C) and low olefin pressure (20 psig), nearly quantitative yield (>95%) of styrene is produced based on the limiting reagent copper(II) pivalate. We propose the selectivity for styrene versus vinyl pivalate at 180 °C is due to a palladium-catalyzed conversion of benzene and in situ formed vinyl pivalate to styrene.
Synthesis of a (N,C,C) Au(iii) pincer complex: Via Csp3-H bond activation: Increasing catalyst robustness by rational catalyst design
Holmsen, Marte Sofie Martinsen,Nova, Ainara,Hylland, Knut,Wragg, David S.,?ien-?Degaard, Sigurd,Heyn, Richard H.,Tilset, Mats
supporting information, p. 11104 - 11107 (2018/10/15)
A (N,CAr,CAlk) Au(iii) pincer complex has been synthesized from Au(OAc)3 (OAc = OCOCH3) and 2-(3,5-di-tert-butylphenyl)pyridine (L1) involving a Csp3-H bond activation by electrophilic substitution. In agreement with DFT calculations, the resulting complex significantly improves the performance of Au(tpy)(OAcF)2 (tpy = 2-(p-tolyl)pyridine, OAcF = OCOCF3) in the catalytic trifluoroacetylation of acetylene.
