Pd-Catalyzed α-Arylation of Nitriles and Esters and γ-Arylation of Unsaturated Nitriles with TMPZnCl·LiCl
摘要:
Using TMPZnCl center dot"LiCl as a kinetically highly active base, nitriles and esters undergo a Pd-catalyzed alpha-arylation under mild conditions. Remarkably, in the case of alpha,beta or beta,gamma-unsaturated nitriles, a regioselective gamma-arylation or a gamma-alkenylation is observed.
reacts with tosyl cyanide to afford the corresponding nitrile in a highly efficient manner. The present methodology is widely applicable to various starting materials including ethers, alcohols, amine derivatives, alkanes, and alkylbenzenes. This newly developed C–H cyanation protocol provides a powerful tool for selective one-carbon elongation for the construction of architecturally complex molecules
Computer‐Driven Development of Ylide Functionalized Phosphines for Palladium‐Catalyzed Hiyama Couplings
作者:Jonas F. Goebel、Julian Löffler、Zhongyi Zeng、Jens Handelmann、Albert Hermann、Ilja Rodstein、Tobias Gensch、Viktoria H. Gessner、Lukas J. Gooßen
DOI:10.1002/anie.202216160
日期:2023.2.20
Ylidefunctionalizedphosphines were tailored supported by computational inverse catalyst design to fit the requirements of mild Hiyamacouplings of aryl chlorides. YPhos/Pd catalyst is highly efficient for the coupling with aryl chlorides in general, and the reaction shows excellent functional group compatibility.
Photochemically Induced Radical Transformation of C(sp<sup>3</sup>)–H Bonds to C(sp<sup>3</sup>)–CN Bonds
作者:Shin Kamijo、Tamaki Hoshikawa、Masayuki Inoue
DOI:10.1021/ol202659e
日期:2011.11.4
A general protocol for direct transformation of unreactive C(sp(3))-H bonds to C(sp(3))-CN bonds has been developed. The C-H activation was effected by photoexcited benzophenone, and the generated carbon radical was subsequently trapped with tosyl cyanide to afford the corresponding nitrile in a highly efficient manner. The present methodology Is widely applicable to versatile starting materials and, thus, serves as a powerful tool for selective one-carbon elongation for construction of architecturally complex molecules.