Solvolyses of tertiary .alpha.-arylcycloalkyl and -polycycloalkyl chlorides. Effects of ring size and substituents in the aryl ring on the solvolysis rates
Intermolecular Oxidative Radical Addition to Aromatic Aldehydes: Direct Access to 1,4- and 1,5-Diketones via Silver-Catalyzed Ring-Opening Acylation of Cyclopropanols and Cyclobutanols
described. The reaction proceeds under mild and neutral conditions and provides a facile access to nonsymmetric 1,4- and 1,5-diketones in promising yields with broad substrate scope. Mechanistic studies including DFT calculations suggest the involvement of an uncommon water-assisted 1,2-HAT process, which is strongly exothermic and thus promotes addition of carbon radicals to aldehydes. In contrast to
Visible-light-induced tandem ring opening/1,6-conjugate addition of cyclobutanols with <i>p</i>-quinone methides under metal- and additive-free conditions
A visible-light-mediated tandem ring opening/1,6-conjugate addition of cyclobutanols with p-quinone methides was developed. This protocol allowed the formation of δ,δ-diaryl ketones in the presence of a readily available organic photocatalyst.
A regioselective Markovnikov hydroarylation of arylcyclobutene has been developed using Brønsted acid catalysis through a protonation/Friedel‐Crafts sequence. The metal‐free catalytic reaction is operationally simple and feasible compared to previous reports that utilized elaborate arylcyclobutene and specific polyfluorinated reagents, affording a variety of gem‐diaryl‐ substituted arylcyclobutene