Radical conjugate addition onto vinyl sulfones was achieved by means of a convenient, tin-free procedure. This was based on the photocatalyzed CH bond activation in aldehydes, amides, ethers and even cycloalkanes by using tetrabutylammonium decatungstate (TBADT). The reaction was likewise effective for the functionalization of β-substituted vinyl sulfones. The products are useful building blocks and
Photochemical generation of acyl and carbamoyl radicals using a nucleophilic organic catalyst: applications and mechanism thereof
作者:Eduardo de Pedro Beato、Daniele Mazzarella、Matteo Balletti、Paolo Melchiorre
DOI:10.1039/d0sc02313b
日期:——
detail a strategy that uses a commercially available nucleophilic organic catalyst to generate acyl and carbamoyl radicals upon activation of the corresponding chlorides and anhydrides via a nucleophilic acyl substitution path. The resulting nucleophilic radicals are then intercepted by a variety of electron-poor olefins in a Giese-type addition process. The chemistry requires low-energy photons (blue