A visible light photoredox catalyzed 1,6-hydrosulfonylation of p-QMs has been demonstrated for the efficient synthesis of S(VI)-diarylmethanes via the incorporation of sulfur dioxide as a key building block for the sulfonyl functionality.
Indolylated diarylmethanes derived from microwave-assisted copper catalyzed decarboxylative reductive coupling of para-quinone methides with 3-indoleacetic acids make spiroindolequinones rapidly accessible.
Synthesis of isobutyronitrile containing diarylmethanes under catalyst and transition-metal free conditions has been developed by 1,6-conjugate addition of azobisisobutyronitrile to para-quinone methides.
Herein, electroreductive umpolung benzylic deuteration of p-QMs using cheap and easily accessible D2O as a deuterium source is reported.
Using eosin Y as a photoredox catalyst, a visible-light-mediated functionalization of indoles with p-quinone methides leading to indolyldiarylmethanes has been developed.