A new procedure for the preparation of 2-vinylindoles and their [4+2] cycloaddition reaction
作者:Yaseen Ali Mosa Mohamed、Fuyuhiko Inagaki、Ryohei Takahashi、Chisato Mukai
DOI:10.1016/j.tet.2011.05.064
日期:2011.7
A new approach for the synthesis of 2-vinylindole derivatives by 5-exo mode cyclization of 2-(3-silyloxymethylallenyl)anilines was developed. The starting allenylanilines were easily prepared by the Stille coupling of o-iodoaniline and allenylstannanes. The formed 2-vinylindole derivatives were transformed into several carbazole derivatives via the [4+2] cycloaddition reaction with suitable dienophiles
3-(o-Trifluoroacetamidoaryl)-1-propargylic esters: common intermediates for the palladium-catalyzed synthesis of 2-aminomethyl-, 2-vinylic, and 2-alkylindoles
3-(o-Trifluoroacetamidoaryl)-1-propargylic esters have been used as common synthetic intermediates for the preparation of a variety of 3-unsubstituted 2-substituted indoles. Treating ethyl 3-(o-trifluoroacetamidoaryl)-1-propargylic carbonates unsubstituted or containing an aryl substituent at the propargylic carbon with piperazines and Pd(PPh3)4 in THF at 80 °C affords 2-(piperazin-1-ylmethyl)indoles in excellent yields
Efficient synthetic route toward biologically active γ-carboline derivatives
作者:Dattatray G. Hingane、Nikita P. Parekh、Ayesha Khan、Radhika S. Kusurkar
DOI:10.1080/00397911.2015.1103874
日期:2016.1.17
ABSTRACT An efficient and short route was established for the synthesis of anti-bovine viral diarrhea virus agents, namely 4-methyl-γ-carboline (SK4M) 1, 3-methyl-γ-carboline (SK3M) 2, 5-methyl-γ-carboline (SK5M) 3, and a new γ-carboline derivative 4, using thermal electrocyclization reaction as a key step. The evaluation of cytotoxicity of compound 4 against human cervical cancer cell line HeLa and
Une nouvelle voie d’acces aux indoles par condensation ylure-amide
作者:M. Le Corre、A. Hercouet、Y. Le Stanc、H. Le Baron
DOI:10.1016/s0040-4020(01)96783-3
日期:1985.1
Abstract-o-Acylaminobenzylidenephosphoranes lead to indoles in good yield by an intramolecularWittig reaction with the amidecarbonylgroup. Mechanistic aspects are discussed. A general method is described for the synthesis of indoles from o-nitrobenzyl bromides and o-aminobenzyl alcohols.
Selective Wittig Reactions for the Synthesis of Variously Substituted 2-Vinylindoles
作者:Manfred Eitel、Ulf Pindur
DOI:10.1055/s-1989-27253
日期:——
Three selective variants of the Wittig reaction for the syntheses of 2-vinylindoles are described. The reactions are relatively easy to perform, exhibit E-selectivity, and are characterized by a good flexibility with regard to the functional groups present in the vinyl moiety.