2,3-Disubstituted indoles bearing 2-hydroxyphenyl moieties at their C3 positions were synthesized from readily available 2-chlorophenols and alkynylanilines via aminopalladation/reductive elimination using Pd–dihydroxyterphenylphosphine catalyst. The catalyst accelerates the introduction of the 2-hydroxyphenyl group at the C3 position of the indole.
Palladium-catalyzed cyclization of o-alkynyltrifluoroacetanilides followed by isocyanide insertion: synthesis of 2-substituted 1H-indole-3-carboxamides
A base-controlled synthesis of 2-substituted secondary and tertiary 1H-indole-3-carboxamides through PdCl2-catalyzed cyclization of o-alkynyltrifluoroacetanilides followed by isocyanide insertion has been developed. The reaction proceeds smoothly at ambient temperature using O2 in air as the sole oxidant of the palladium catalyst.
Aminopalladation-Triggered Carbene Insertion Reaction: Synthesis of 2-(1<i>H</i>-Indol-3-yl)acetates
作者:Ziwei Hu、Shuang Luo、Qiang Zhu
DOI:10.1002/adsc.201400799
日期:2015.3.23
red carbeneinsertionreaction for the synthesis of C‐3 alkylated indole derivatives from ortho‐alkynyltrifluoroacetanilides and α‐diazoacetates is presented; it involves a palladium catalyst and a weak base in the open air. Yields range from 49–88% with excellent functional group tolerance. The reaction proceeds through intramolecular aminopalladation of alkynes followed by carbeneinsertion. Migratory
Copper-Mediated Cyclization−Halogenation and Cyclization−Cyanation Reactions of β-Hydroxyalkynes and <i>o</i>-Alkynylphenols and Anilines
作者:Nalivela Kumara Swamy、Arife Yazici、Stephen G. Pyne
DOI:10.1021/jo1005119
日期:2010.5.21
The CuX (X = I, Br, Cl, CN)-mediated cyclization−halogenation and cyclization−cyanation reactions of β-hydroxyalkynes and o-alkynylphenol and -aniline derivatives give rise to 3-halo- and 3-cyanofuro[3,2-b]pyrroles, 3-iodo-, 3-bromo-, and 3-cyanobenzofurans, and 3-cyanoindoles, respectively.
CuX(X = I,Br,Cl,CN)介导的β-羟基炔烃与邻炔基苯酚和-苯胺衍生物的环化-卤化和环化-氰化反应生成3-卤代和3-氰基呋喃[3,2 - b ]吡咯,3-碘,3-溴-和3- cyanobenzofurans和3- cyanoindoles,分别。