yield. The bromine atom-transfer radical addition in benzene was not satisfactory. The addition proceeded smoothly in polar solvents such as DMF and DMSO, protic solvents such as 2,2,2-trifluoroethanol and 1,1,1,3,3,3-hexafluoro-2-propanol, and aqueous media. Ab initio calculations were conducted to reveal the origin of the solvent effect of water in the addition reaction. The polar effect of solvents
Photocatalytic ATRA reaction promoted by iodo-Bodipy and sodium ascorbate
作者:G. Magagnano、A. Gualandi、M. Marchini、L. Mengozzi、P. Ceroni、P. G. Cozzi
DOI:10.1039/c6cc09387f
日期:——
Using ascorbate as a sacrificial reductant, iodo-Bodipy dye is able to promote the ATRA reaction between bromoderivatives and alkenes.
使用抗坏血酸作为牺牲性还原剂,碘代-Bodipy染料能够促进溴衍生物和烯烃之间的ATRA反应。
Application of coumarin dyes for organic photoredox catalysis
作者:Andrea Gualandi、Giacomo Rodeghiero、Emanuele Della Rocca、Francesco Bertoni、Marianna Marchini、Rossana Perciaccante、Thomas Paul Jansen、Paola Ceroni、Pier Giorgio Cozzi
DOI:10.1039/c8cc04048f
日期:——
Here we report the application of readily prepared and available coumarin dyes for photoredoxcatalysis, which are able to mimic powerful reductant [Ir(III)] complexes. Coumarin derivatives 9 and 10 were employed as photoreductants in pinacol coupling and in other reactions, in the presence of Et3N as a sacrificial reducing agent. As the electronic, photophysical, and steric properties of coumarins