developed a B(C6F5)3catalyzedhydroarylation of terminalalkynes with various phenols at room temperature without adding any additives, leading to the synthesis of 2-gem-vinylphenols with good regio-selectivity. Those transformations featured a broad substrate scope with moderate yields. Mechanism studies indicated that those transformations proceeded through the activation of phenol by B(C6F5)3 with subsequent
AgOTf-Catalyzed Tandem Reaction of Oxabenzonorbornadienes with Arylacetylenes
作者:Yongyun Zhou、Shanshan Liu、Hualei Chen、Jingchao Chen、Weiqing Sun、Sifeng Li、Qingjing Yang、Baomin Fan
DOI:10.1002/cjoc.201500392
日期:2015.10
A tandem isomerization/hydroarylation reaction of oxabenzonorbornadienes and arylacetylenes was realized by using AgOTf as catalyst. 1,1‐Diarylethylenes could be easily generated as products in moderate to good yields in this tandemreaction.
A highly atom-efficient synthetic protocol for hydroarylation of terminal-aryl alkynes and styrene through the regioselective CC bond formation via the electrophilic addition of naphthols and substituted phenols has been developed using alumina-sulfuric acid as a heterogeneous supported solid acid catalyst. This methodology shows excellent regioselectivity and affords the desired product in good to
3D Nanoporous FeAl-KIT-5 with a cage type pore structure: a highly efficient and stable catalyst for hydroarylation of styrene and arylacetylenes
作者:Shaji Varghese、Samuthira Nagarajan、Mercy R. Benzigar、Ajayan Mano、Zeid A. ALOthman、George Allen Gnana Raj、Ajayan Vinu
DOI:10.1016/j.tetlet.2012.01.040
日期:2012.3
A novel bimetallic nanoporous FeAl-KIT-5 catalyst with a cage type porous structure and a high surface area has been prepared for the hydroarylation of styrene and arylacetylenes to afford 1,1-diarylalkanes and 1,1-diarylalkenes, respectively. The catalyst was found to be highly active, and selective, affording a high yield of substituted alkanes and alkenes. The catalyst also showed much higher activity
hydroarylation with naphthols and phenols in the presence of 10 mol% of gallium(III) chloride in refluxing toluene to afford the corresponding 2-vinylnaphthols and -phenols in good yields with high regioselectivity. Similarly, styrenes undergo hydroarylation with naphthols and phenols to provide substituted naphthols and phenols. arylations - arylacetylenes - gallium(III) chloride - phenols - addition reactions