已开发出一种使用 TMSCF 3作为二氟亚甲基源的可控双 CF 2插入五氟苯基铜物质的高效方法。新生成的氟烷基铜 ( I ) 物质 C 6 F 5 CF 2 CF 2 Cu 对大量结构多样的芳基、杂芳基和烯基碘化物表现出良好的反应性。该协议易于处理,可扩大规模并适用于相对复杂分子的合成,从而为轻松获取四氟乙烯桥接结构提供了一种便捷的方法。
Photocatalytic Decarboxylative Coupling of Aliphatic N‐hydroxyphthalimide Esters with Polyfluoroaryl Nucleophiles
作者:Xiangli Yi、Runze Mao、Lara Lavrencic、Xile Hu
DOI:10.1002/anie.202108465
日期:2021.10.25
of alkylated polyfluoroarenes remains challenging. Here we describe a decarboxylative coupling reaction of N-hydroxyphthalimide esters of aliphatic carboxylicacids with polyfluoroaryl zinc reagents (Zn-ArF) via synergetic photoredox and copper catalysis. This method readily converts primary and secondary alkyl carboxylicacids into the corresponding polyfluoroaryl compounds, which could have a wide
多氟芳烃是医学和材料化学中的一类重要化合物。烷基化多氟芳烃的合成仍然具有挑战性。在这里,我们描述了脂肪族羧酸的 N-羟基邻苯二甲酰亚胺酯与多氟芳基锌试剂 (Zn-Ar F ) 通过协同光氧化还原和铜催化进行的脱羧偶联反应。该方法很容易将伯烷基羧酸和仲烷基羧酸转化为相应的多氟芳基化合物,该化合物可以具有广泛的 F 含量 (2F-5F) 和芳基上可变的 F 取代模式。实现了广泛的范围和良好的官能团相容性,包括在天然产物和药物衍生的底物上。机理研究表明,[Cu-(Ar F ) 2 ]物种可能负责将多氟芳基转移至烷基自由基。
Well-Defined Boron-Containing Polymeric Lewis Acids
A general new route to well-defined polymeric Lewis acids via borylation of silylated polymers is reported. Trimethylsilylated polystyrene (PS-Si) of controlled molecular weight and low polydispersity (PDI < 1.15) was obtained via atom transfer radical polymerization (ATRP) of 4-(trimethylsilyl)styrene. The functional polymer PS-Si was quantitatively borylated using BBr3 to give poly(4-dibromoborylstyrene)
[1,1'-Biphenyl]-3-ylmethyl pyrethroid esters, as well as processes, uses, and intermediates thereto, are disclosed. The [1,1'-biphenyl]-3-ylmethyl pyrethroid esters control a broad spectrum of insects as well as acarids.
[1,1'-Biphenyl]-3-ylmethyl pyrethroid esters, as well as processes, uses, and intermediates thereto, are disclosed. The [1,1'-biphenyl]-3-ylmethyl pyrethroid esters control a broad spectrum of insects as well as acarids.
Novel B(Ar′)<sub>2</sub>(Ar′′) hetero-tri(aryl)boranes: a systematic study of Lewis acidity
作者:Robin J. Blagg、Trevor R. Simmons、Georgina R. Hatton、James M. Courtney、Elliot L. Bennett、Elliot J. Lawrence、Gregory G. Wildgoose
DOI:10.1039/c5dt03854e
日期:——
Nine homo- and hetero-tri(aryl)boranes related by stepwise aryl substitutions, are studied for H2 cleavage as part of an FLP, and comparative Lewis acidity/electrochemical measurements discussed.