高价值的芳烃磺酰氟的有限供应严重阻碍了它们在许多研究领域的进一步应用,包括药物化学和化学生物学,有机合成,聚合物制备等。我们在此报告了一种温和而有效的各种铜氮杂唑鎓盐的无铜Sandmeyer型氟磺酰化反应,使用K 2 S 2 O 5作为还原剂和实用的磺酰基源结合N-氟苯磺酰亚胺作为有效的氟制备有价值的芳磺酰氟的方法。资源。考虑到总体实用性和范围,该方法学提供了一条吸引人的途径,可用于生产各种重要的芳烃磺酰氟。
[3 + 2] Cycloaddition of Isocyanides with Aryl Diazonium Salts: Catalyst-Dependent Regioselective Synthesis of 1,3- and 1,5-Disubstituted 1,2,4-Triazoles
作者:Jian-Quan Liu、Xuanyu Shen、Yihan Wang、Xiang-Shan Wang、Xihe Bi
DOI:10.1021/acs.orglett.8b03069
日期:2018.11.2
An unprecedented catalyst-dependent regioselective [3 + 2] cycloaddition of isocyanides with aryl diazonium salts is reported. 1,3-Disubstituted 1,2,4-triazoles were selectively obtained in high yield under Ag(I) catalysis, whereas 1,5-disubstituted 1,2,4-triazoles were formed by Cu(II) catalysis. These catalytic methodologies provide a controlled, modular, and facile access to 1,2,4-triazole scaffolds
Gold(<scp>i</scp>)-catalyzed cross-coupling reactions of aryldiazonium salts with organostannanes
作者:Manjur O. Akram、Popat S. Shinde、Chetan C. Chintawar、Nitin T. Patil
DOI:10.1039/c8ob00630j
日期:——
Gold(I)-catalyzed cross-couplingreactions of aryldiazonium salts with organostannanes are described. This redox neutral strategy offers an efficient approach to diverse biaryls, vinyl arenes and arylacetylenes. Monitoring the reaction with NMR and ESI-MS provided strong evidence for the in situ formation of Ph3PAuIR (R = aryl, vinyl and alkynyl) species which is crucial for the activation of aryldiazonium
描述了金(I)催化的芳基重氮盐与有机锡烷的交叉偶联反应。这种氧化还原中性策略为各种联芳基,乙烯基芳烃和芳基乙炔提供了一种有效的方法。用NMR和ESI-MS监测反应为原位形成Ph 3 PAu I R(R =芳基,乙烯基和炔基)物种提供了有力证据,这对于激活芳基重氮盐至关重要。
Hypervalent Iodine(III)-Catalyzed Balz-Schiemann Fluorination under Mild Conditions
作者:Bo Xing、Chuanfa Ni、Jinbo Hu
DOI:10.1002/anie.201802466
日期:2018.7.26
An unprecedented hypervalentiodine(III) catalyzed Balz–Schiemann reaction is described. In the presence of a hypervalentiodine compound, the fluorination reaction proceeds under mild conditions (25–60 °C), and features a wide substrate scope and good functional‐group compatibility.
Photoinduced, Direct C(sp
<sup>2</sup>
)−H Bond Azo Coupling of Imidazoheteroarenes and Imidazoanilines with Aryl Diazonium Salts Catalyzed by Eosin Y
作者:Sumbal Saba、Caio R. Dos Santos、Bruno R. Zavarise、Aline A. S. Naujorks、Marcelo S. Franco、Alex R. Schneider、Marcos R. Scheide、Ricardo F. Affeldt、Jamal Rafique、Antonio L. Braga
DOI:10.1002/chem.201905308
日期:2020.4.6
Herein, a greener approach to the eosin Y-Na2 catalyzed, C(sp2 )-H bond azo coupling of imidazoheteroarene with aryl diazoniumsalts is described, under acid free conditions. This direct photoredox process resulted in the corresponding azo products in good to excellent yields. Besides, this new approach could also be applicable to anilines, which is a poorly reactive substrate by other methods. The
Desulfinative and denitrogenative palladium-catalyzed cross-coupling of arylsulfonyl hydrazides with aryl diazonium salts
作者:Yonghui Shang
DOI:10.1002/aoc.4484
日期:2018.11
Palladium‐catalyzedcross‐coupling of arylsulfonyl hydrazides with aryl diazonium salts to provide biaryl products under relatively mild conditions is established. This reaction proceeded smoothly with tetrabutylammonium iodide and gave the corresponding products with CC bonds formed using PdCl2/bis (dicyclohexylphosphino) methane catalyst under air. This method also allowed easy access to significant