An efficient Brønsted acid-catalyzed Friedel-Crafts-type alkylation of arenes with α-aryl diazoacetates has been developed. This protocol enables effective access to various highly functionalized diarylmethane derivatives in moderate to high yields. Moreover, the product of selected diaryl acetate could be transformed to β, β-diaryl substituted γ-butyrolactone.
Reactions of thioalkynes with diarylketenes <i>via</i> [3+2]-annulation <i>versus</i> benzannulation using Au and P(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub> catalysts
作者:Sayaji Arjun More、Vikas Ashokrao Sadaphal、Tung-Chun Kuo、Mu-Jeng Cheng、Rai-Shung Liu
DOI:10.1039/d2cc03613d
日期:——
Two catalytic annulations of non-symmetric diarylketenes with thioalkynes are described using gold and phosphine catalysts respectively.