A three‐component coupling between alkanes, CO, and electron‐deficient alkenes in the presence of a catalytic amount of (nBu4N)4W10O32 (TBADT) has resulted in the efficient formation of unsymmetrical ketones. This process is based on the carbonylation of alkyl radicals photocatalytically generated by CH activation of alkanes and the subsequent addition to alkenes (see scheme; EWG=electron‐withdrawing
在催化量为(n Bu 4 N)4 W 10 O 32(TBADT)的存在下,烷烃,CO和缺电子烯烃之间的三组分偶联导致有效形成不对称酮。此过程基于烷烃的CH活化光催化产生的烷基的羰基化反应,随后将其添加到烯烃中(请参见方案; EWG =吸电子基团)。
Hydrogen Atom Transfer Reactions via Photoredox Catalyzed Chlorine Atom Generation
作者:Samantha Rohe、Avery O. Morris、Terry McCallum、Louis Barriault
DOI:10.1002/anie.201810187
日期:2018.11.26
waste‐limiting, and atom‐economical. The catalytic generation of chlorineatoms from chloride ions is one of the most challenging redox processes, where the requirement of harsh and oxidizing reaction conditions renders it seldom utilized in synthetic applications. We report the mild, controlled, and catalytic generation of chlorineatoms as a new opportunity for access to a wide variety of hydrogen atom transfer
Photoinduced Halogen-Atom Transfer by <i>N</i>-Heterocyclic Carbene-Ligated Boryl Radicals for C(sp<sup>3</sup>)–C(sp<sup>3</sup>) Bond Formation
作者:Ting Wan、Luca Capaldo、Davide Ravelli、Walter Vitullo、Felix J. de Zwart、Bas de Bruin、Timothy Noël
DOI:10.1021/jacs.2c10444
日期:2023.1.18
study on the use of N-heterocyclic carbene (NHC)-ligated borylradicals to enable C(sp3)–C(sp3) bond formation under visible-light irradiation via Halogen-Atom Transfer (XAT). The methodology relies on the use of an acridinium dye to generate the boron-centered radicals from the corresponding NHC-ligated boranes via single-electron transfer (SET) and deprotonation. These borylradicals subsequently