Abstract An efficient and facile process has been developed for the regioselective C5 nitration of the N-protected indolines using ferric nitrate as the nitrating reagents. The reaction proceeded smoothly in moderate to excellent yields with high efficiency and broad substrate scope undermildconditions. In addition, the synthesized nitration products can be further transformed to 5-nitroindolines
摘要 使用硝酸铁作为硝化试剂,开发了一种高效、简便的方法,用于 N 保护的二氢吲哚的区域选择性 C5 硝化。该反应在温和条件下以中等至优异的产率、高效和广泛的底物范围顺利进行。此外,合成的硝化产物可以进一步转化为5-硝基二氢吲哚和C5-硝基吲哚衍生物。该方法操作简单、高效,在工业生产中具有潜在的应用价值。图形概要
Dérivés indoliniques et compositions tinctoriales pour fibres kératiniques
申请人:L'OREAL
公开号:EP0604278B1
公开(公告)日:2001-02-21
Manganese(III) Acetate Catalyzed Aerobic Dehydrogenation of Tertiary Indolines, Tetrahydroquinolines and an
<i>N</i>
‐Unsubstituted Indoline
作者:Xiaokang Niu、Lei Yang
DOI:10.1002/adsc.202100581
日期:2021.9.7
A Mn(OAc)3 ⋅ 2H2O-catalyzed aerobic dehydrogenation of five and six-membered N-heterocycles for the synthesis of N-heteroarenes is reported. Of note, this protocol can be applied to the dehydrogenation of tertiary indolines with various electron-deficient N-substituents. Preliminary mechanistic investigations support that a single-electron transfer pathway might be involved.
报道了Mn(OAc) 3 ⋅ 2H 2 O 催化的五元和六元N-杂环有氧脱氢反应,用于合成N-杂芳烃。值得注意的是, 该协议可应用于具有各种缺电子N取代基的叔二氢吲哚的脱氢。初步机理研究支持可能涉及单电子转移途径。