modular method for the synthesis of (Z)-3-[amino(phenyl/methyl)methylidene]-1,3-dihydro-2H-indol-2-ones starting from easily available 3-bromooxindoles or (2-oxoindolin-3-yl)triflate and thioacetamides or thiobenzamides is described. A series of 49 compounds, several of which have previously been shown to possess significant tyrosin kinase inhibiting activity, was prepared in yields varying mostly from
A diastereoselectivepalladiumcatalyzedcarbenylativeamination of ortho‐vinylaniline with 3‐diazoindolines‐2‐one have been accomplished for the synthesis of various tetrasubstituted indoline fused spirooxindole with good yields and diastereoselectivity. Notable features of the method include construction of two contiguous tetrasubstituted carbon stereocenters via C−N and C−C bond formation in single
Divergent and Selective Synthesis of 3-Alkylidene Oxindoles Using Pd-Catalyzed Multicomponent Reaction
作者:Pooja Soam、Debasish Mandal、Vikas Tyagi
DOI:10.1021/acs.joc.3c00994
日期:2023.8.4
and selective synthesis of (E)-3-alkylidene oxindole, which is a highly valuable framework due to its presence in biologically important molecules, via palladium-catalyzed multicomponent reaction of 3-diazo oxindole, isocyanide, and aniline has been developed. Further, the feasibility of the reaction was demonstrated by employing differently substituted 3-diazo oxindoles, isocyanides, and anilines
在此,通过 3-重氮羟吲哚、异氰化物和苯胺的钯催化多组分反应,发散性选择性合成了 ( E )-3-亚烷基羟吲哚,由于其存在于生物学上重要的分子中,因此是一种非常有价值的框架。发达。此外,通过使用不同取代的3-重氮吲哚、异氰化物和苯胺作为起始原料并以31-83%的分离收率获得相应的产物,证明了该反应的可行性。此外,还提出了一种合理的机制,并使用 DFT 计算进行了进一步研究,表明 Pd-卡宾配合物和烯酮亚胺中间体的形成是催化循环中的关键步骤。
A highly efficient method to access unprotected C-3 bifunctional quaternary 3-allyl-3-(amino)oxindoles
possess 3-allyl and 3-amino simultaneously, was first achieved by employing an intermolecular [2,3]-sigmatropic rearrangementreaction between diazooxindoles and tertiary allylic amines. Utilizing readily available allylamines as the nitrogen and allyl source concurrently, a wide range of bio-active 3-allyl-3-(amino)oxindoles were obtained in excellent yields under very mild reaction conditions; meanwhile
Synthesis of <i>N</i>-fused polycyclic indoles <i>via</i> a Pd-catalyzed multicomponent cascade reaction consisting of an amide-directed [3+1+1] annulation reaction of 3-diazo oxindole and isocyanides
作者:Pooja Soam、Debasish Mandal、Vikas Tyagi
DOI:10.1039/d3nj04886a
日期:——
A palladium-catalyzed and amide-assisted multicomponent reaction of 3-diazo oxindole, isocyanide, and water to generate biologically important oxazole-fused indole scaffolds has been reported.