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。
Visible‐Light‐Mediated Dual Decarboxylative Coupling of Redox‐Active Esters with α,β‐Unsaturated Carboxylic Acids
An efficient visible-light-induced decarboxylative coupling between α,β-unsaturatedcarboxylicacids and alkyl N-hydroxyphthalimide esters has been developed. A wide range of redox-active esters derived from aliphatic carboxylicacids (1°, 2° and 3°) proved viable in this dual decarboxylation process, affording a broad scope of substituted alkenes in moderate to excellent yields with good E/Z selectivities
Alkyl arylethers are an important class of compounds in medicinal and agricultural chemistry. Catalytic C(sp3)−O cross‐coupling of alkyl electrophiles with phenols is an unexplored disconnection strategy to the synthesis of alkyl arylethers, with the potential to overcome some of the major limitations of existing methods such as C(sp2)−O cross‐coupling and SN2 reactions. Reported here is a tandem
烷基芳基醚是药物和农业化学中重要的一类化合物。烷基亲电试剂与酚类的催化C(sp 3)-O交叉偶联是烷基芳基醚合成的未探索的断开策略,具有克服现有方法(例如C(sp 2)-的某些主要局限性)的潜力O交叉偶联和S N 2反应。本文报道了串联的光氧化还原和铜催化以实现烷基N的脱羧C(sp 3)-O偶联‐羟基邻苯二甲酰亚胺(NHPI)与酚在温和的反应条件下形成的酯。该方法用于使用容易获得的烷基羧酸(包括许多天然产物和药物分子)合成各种烷基芳基醚。证明了在范围和功能组对现有方法的容忍度方面的互补性。
Visible-Light-Induced Regioselective Alkylation of Coumarins via Decarboxylative Coupling with <i>N</i>-Hydroxyphthalimide Esters
作者:Can Jin、Zhiyang Yan、Bin Sun、Jin Yang
DOI:10.1021/acs.orglett.9b00327
日期:2019.4.5
An efficient photocatalytic decarboxylative 3-position alkylation of coumarins by using alkyl N-hydroxyphthalimide esters as alkylationreagents has been developed. A variety of NHP esters derived from aliphatic carboxylicacids (primary, secondary, and tertiary) has been proved to be tolerated for this decarboxylation process, affording a broad scope of 3-alkylated coumarin derivatives in moderate
Porous coordination polymers were used as photocatalysts, combining photocatalysis and copper catalysis to realize decarboxylative radical cyanation reactions.