Brønsted Acid-Catalyzed Intramolecular Hydroarylation of β-Benzylstyrenes
作者:Xiao Cai、Amir Keshavarz、Justin D. Omaque、Benjamin J. Stokes
DOI:10.1021/acs.orglett.7b00958
日期:2017.5.19
triphenylmethylium tetrakis(pentafluorophenyl)borate as a convenient Brønsted acid precatalyst, β-(α,α-dimethylbenzyl)styrenes are shown to cyclize efficiently to afford a variety of new indanes that possess a benzylic quaternary center. The geminal dimethyl-containing quaternary center is proposed to be necessary to arm the substrate for cyclization through steric biasing.