Gold-Catalyzed Direct Hydrogenative Coupling of Nitroarenes To Synthesize Aromatic Azo Compounds
作者:Xiang Liu、Hai-Qian Li、Sen Ye、Yong-Mei Liu、He-Yong He、Yong Cao
DOI:10.1002/anie.201404543
日期:2014.7.14
The azo linkage is a prominent chemical motif which has found numerous applications in materials science, pharmaceuticals, and agrochemicals. Described herein is a sustainable heterogeneous‐gold‐catalyzed synthesis of azo arenes. Available nitroarenes are deoxygenated and linked selectively by the formation of NN bonds using molecular H2 without any external additives. As a result of a unique and
Photoinduced<i>N</i>-Methylation and<i>N</i>-Sulfonylation of Azobenzenes with DMSO Under Mild Reaction Conditions
作者:Ning Xu、Yan Zhang、Wei Chen、Pinhua Li、Lei Wang
DOI:10.1002/adsc.201701548
日期:2018.3.20
with dimethyl sulfoxide (DMSO) was developed in the absence of an external photosensitizer under mild conditions. The reactions underwent smoothly to generate the corresponding products in high yields through a radical addition using the starting material azobenzene as a photosensitizer. This strategy features simple operation, easily available starting materials and DMSO acting as both methylating
Photocatalysis Enabling Acceptorless Dehydrogenation of Diaryl Hydrazines at Room Temperature
作者:Manoj K. Sahoo、Krishnasamy Saravanakumar、Garima Jaiswal、Ekambaram Balaraman
DOI:10.1021/acscatal.8b01579
日期:2018.8.3
catalytic acceptorless dehydrogenation of diarylhydrazine derivatives to access a wide variety of aryl-azo compounds with the removal of molecular hydrogen as the sole byproduct. This distinctive reactivity has been achieved under dual catalytic conditions by merging the visible-light active [Ru(bpy)3]2+ as the photoredox catalyst and Co(dmgH)2(py)Cl as the proton-reduction catalyst. The reaction proceeds
Photocatalyzed oxidative dehydrogenation of hydrazobenzenes to azobenzenes
作者:Haiping Lv、Ronibala Devi Laishram、Jiayan Li、Yongyun Zhou、Dandan Xu、Sagar More、Yuze Dai、Baomin Fan
DOI:10.1039/c9gc01235d
日期:——
Visible light mediated oxidativedehydrogenation of hydrazobenzenes under an ambient atmosphere using an organic dye as a photocatalyst was reported for the first time. The reaction provides an environmentally benign method for the preparation of azobenzenes in excellent yields with good functional group tolerance.