Dihalo(imidazolium)sulfuranes: A Versatile Platform for the Synthesis of New Electrophilic Group-Transfer Reagents
作者:Garazi Talavera、Javier Peña、Manuel Alcarazo
DOI:10.1021/jacs.5b05287
日期:2015.7.15
thioalkynes from dihalo(imidazolium) sulfuranes are reported and their reactivities as CN(+) and R-CC(+) synthons evaluated, respectively. The easy and scalable preparation of these electrophilic reagents, their operationally simple handling, broad substrate scope, and functional group tolerance clearly illustrate the potential of these species to become a reference for the direct electrophilic cyanation
Sterically controlled C–H/C–H homocoupling of arenes <i>via</i> C–H borylation
作者:Xiaocong Pei、Guan Zhou、Xuejing Li、Yuchen Xu、Resmi C. Panicker、Rajavel Srinivasan
DOI:10.1039/c9ob00995g
日期:——
A mild one-pot protocol for the synthesis of symmetrical biaryls by sequential Ir-catalyzed C-H borylation and Cu-catalyzed homocoupling of arenes is described. The regiochemistry of the biaryl formed is sterically controlled as dictated by the C-H borylation step. The methodology is also successfully extended to heteroarenes. Some of the products obtained by this approach are impossible to obtain
carbene-palladium complex (SilFemBenzNHC@Pd) has been prepared and characterized by using fourier transform infrared (FT-IR), fourier transform Raman (FT-Raman), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and energy dispersive X-ray analysis (EDX). This novel complex served as a robust heterogeneous catalyst for the synthesis of biaryls via homocoupling
摘要 采用傅里叶变换红外(FT-IR)、傅里叶变换拉曼(FT-Raman)、X射线光电子能谱( XPS)、扫描电子显微镜 (SEM)、热重分析 (TGA) 和能量色散 X 射线分析 (EDX)。这种新型复合物可作为一种强大的多相催化剂,用于在水中无碱条件下通过芳基硼酸的均偶联合成联芳基化合物。连续六次运行成功地执行了可回收性实验。图形摘要
Fast, Efficient and Low E-Factor One-Pot Palladium-Catalyzed Cross-Coupling of (Hetero)Arenes
作者:Erik B. Pinxterhuis、Paco Visser、Iwan Esser、Jean-Baptiste Gualtierotti、Ben L. Feringa
DOI:10.1002/anie.201707760
日期:2018.7.20
coupling partner. These polyaromatic structures are obtained in high yields, in 10 min at room temperature, with minimal waste generation (E‐factors as low as 1.5) and without the need for strict inert conditions, making this process highly efficient and practical in comparison to classical methods. As illustration, several key intermediates of widely used BINOL‐derived structures are readily prepared