Healthcare careers for chemists are once again largely based in laboratories, although increasingly there is opportunity to work at the point of care, helping with patient investigation. 4923-87-9
Using triphenylmethylium tetrakis(pentafluorophenyl)borate as a convenient Br°nsted acid precatalyst, beta-(alpha,alpha-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.
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Reference：
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem