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。
An efficient method for trifluoromethylthiolation of arenediazonium salts has been developed in mild conditions with a stable and convenient AgSCF3. It provides a straightforward and convenient way for the synthesis of trifluoromethylthiolated compound from diazonium salts in moderate to good yields.
Just a DAB: A new metal-free [2+2] cycloaddition/S-centered radical induced 1,4-addition sequence of benzene-linked allene-ynes has been established by treatment with aryldiazonium tetrafluoroborates and DABCO-bis(sulfur dioxide) under convenient reaction conditions, thus providing practical access to functionalized cyclobuta[a]naphthalen-4-ols of chemical and biomedical importance. DABCO=1,4-diazabicyclo[2
Dual gold/photoredox-catalyzed C(sp)–H arylation of terminal alkynes with diazonium salts
作者:Adrian Tlahuext-Aca、Matthew N. Hopkinson、Basudev Sahoo、Frank Glorius
DOI:10.1039/c5sc02583d
日期:——
The arylation of alkyl and aromatic terminal alkynes by a dual gold/photoredoxcatalytic system is described. Using aryldiazonium salts as readily available aryl sources, a range of diversely-functionalized arylalkynes could be synthesized under mild, base-free reaction conditions using visible light from simple household sources or even sunlight. This process, which exhibits a broad scope and functional
描述了金/光氧化还原双催化系统对烷基和芳族末端炔烃的芳基化。使用芳基重氮盐作为容易获得的芳基源,可以使用来自简单家庭来源的可见光甚至阳光,在温和、无碱的反应条件下合成一系列不同官能化的芳基炔。该过程表现出广泛的范围和官能团耐受性,将双金/光氧化还原催化的转化范围扩大到涉及 C-H 键功能化的转化范围,并证明了该概念在以下条件下获得 Au I / Au III氧化还原化学的潜力:温和的氧化还原中性条件。
Synthesis of Diarylethynes from Aryldiazonium Salts by Using Calcium Carbide as an Alkyne Source in a Deep Eutectic Solvent
作者:Zheng Li、Xiaolong Ma
DOI:10.1055/s-0040-1706638
日期:2021.4
An efficient method for the synthesis of diarylethynes from aryldiazonium salts by usingcalciumcarbide as an alkyne source at room temperature in a deep eutectic solvent is described. The salient features of this protocol are an inexpensive and easy-to-handle alkyne source, a nonvolatile and recyclable solvent, mild conditions, and a simple workup procedure.
Copper-Catalyzed Arylsulfonylation and Cyclizative Carbonation of <i>N</i>-(Arylsulfonyl)acrylamides Involving Desulfonative Arrangement toward Sulfonated Oxindoles
作者:Hepan Wang、Song Sun、Jiang Cheng
DOI:10.1021/acs.orglett.7b02827
日期:2017.11.3
N-(arylsulfonyl)acrylamides, DABSO, and aryldiazoniumtetrafluoroborates. This transformation is triggered by the formation of arylsulfonyl radicals in situ from the reaction of aryldiazoniumtetrafluoroborates and DABSO. Afterward, the sequential radical addition, radical cyclization, and desulfonylative 1,4-aryl migration take place to provide the final product by the formation of four new bonds in one pot. This