B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Sequential Additions of Terminal Alkynes to <i>para</i>-Substituted Phenols: Selective Construction of Congested Phenol-Substituted Quaternary Carbons
作者:Hui Chen、Mo Yang、Guoqiang Wang、Liuzhou Gao、Zhigang Ni、Jingxiang Zou、Shuhua Li
DOI:10.1021/acs.orglett.1c01863
日期:2021.7.16
We have developed a borane-catalyzed sequential addition of terminal alkynes to para-substitutedphenols, which affords a wide range of ortho-propargylic alkylated phenols bearing congested quaternary carbons. Control experiments combined with DFT calculations suggest that the reaction undergoes a sequential phenol alkenylation/hydroalkynylation process. Further extension of this strategy to the construction
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