highly effective C−O coupling reaction of (hetero)aryl electrophiles with primary and secondary alcohols is reported. Catalyzed by a NiII‐arylcomplex under long‐wave UV (390–395 nm) irradiation in the presence of a soluble amine base without any additional photosensitizer, the reaction enables the etherification of aryl bromides and arylchlorides as well as sulfonates with a wide range of primary
据报道,(杂)芳基亲电试剂与伯醇和仲醇的高效C-O偶联反应。在可溶性胺碱的存在下,在没有任何其他光敏剂的情况下,在长波紫外线(390–395 nm)辐射下,由Ni II-芳基络合物催化,该反应可以使芳基溴化物和芳基氯化物以及磺酸盐与多种伯和仲脂族醇,可提供合成上重要的醚。分子内CO偶联也是可能的。该反应似乎通过Ni I -Ni III催化循环进行。
Metallaphotoredox C−O and C−N Cross‐Coupling Using Donor‐Acceptor Cyanoarene Photocatalysts
作者:Tommaso Gandini、Luigi Dolcini、Lorenzo Di Leo、Matthieu Fornara、Alberto Bossi、Marta Penconi、Alberto Dal Corso、Cesare Gennari、Luca Pignataro
DOI:10.1002/cctc.202200990
日期:2022.12.7
Timely delay: Donor-acceptor cyanoarenes capable of thermally activated delayed florescence (TADF) are shown to effectively promote metallaphotoredoxC−O and C−Ncoupling in the presence of light and a nickel catalyst. These readily available organic dyes represent a convenient replacement for precious metal photocatalysts.
Thermal Nickel-Catalyzed Carbon–Oxygen Cross-Coupling of (Hetero)aryl Halides with Alcohols Enabled by the Use of a Silane Reductant Approach
作者:Liu Yang、Hai-Juan Jiao、Geyang Song、Yan-Ru Huang、Nan Ji、Dong Xue、Wei He
DOI:10.1021/acscatal.4c01283
日期:2024.5.17
cross-coupling of aryl halides with primary and secondary alcohols, without the need for photo- or electrocatalysis. The protocol is simple and has a wide substrate scope, particularly for challenging electron-rich aryl halides. Additionally, this methodology has been successfully applied to the late-stage functionalization of drugs and natural products, as well as the synthesis of pharmaceuticals such