Hydroarylation of unsaturated carbon–carbon bonds in cross-conjugated enynones under the action of superacid CF<sub>3</sub>SO<sub>3</sub>H or acidic zeolite HUSY. Reaction mechanism and DFT study on cationic intermediate species
作者:Maiia I. Aleksandrova、Stanislav V. Lozovskiy、Steve Saulnier、Alexander A. Golovanov、Irina A. Boyarskaya、Aleksander V. Vasilyev
DOI:10.1039/c8ob01985a
日期:——
products of hydroarylation of the acetylene bond only,1,1,5-triarylpent-1,4-dien-3-ones, in yields up to 98%. These dienones add one more arene molecule to the double carbon–carbon bond in neat TfOH forming 1,1,5,5-tetraarylpent-1-en-3-ones in high yields. Cationic reaction intermediates have been studied by means of DFT calculations to elucidate plausible reaction mechanisms.
TfOH-吡啶体系中或在酸性沸石HUSY的作用下,交叉共轭的烯酮1,5,5-二芳基戊-1-en-4-yn-3-ones与芳烃的反应选择性地导致乙炔的氢芳基化产物仅键合1,1,5-三芳基戊-1,4-二烯-3-酮,产率高达98%。这些二烯酮在纯净的TfOH中的双碳-碳键上又增加了一个芳烃分子,从而高产率地形成1,1,5,5-四芳基戊-1-烯-3-酮。已通过DFT计算研究了阳离子反应中间体,以阐明可能的反应机理。