The reactivity of 2-vinylindoles with dimethyl acetylenedicarboxylate
作者:R. Alan Jones、Pilar Martinez Fresneda、Teresa Aznar Saliente、José Sepúlveda Arques
DOI:10.1016/s0040-4020(01)91317-1
日期:1984.1
nes with dimethylacetylenedicarboxylate are considerably lower than those of the corresponding 2-vinyl- pyrroles. Steric interaction between the N-methyl group on the indole ring and the 1-substituent on the ethenyl group prevents the diene system adopting a coplanar configuration and, thereby, inhibits the π4 + π2 cycloaddition reaction of the system with dimethylacetylenedicarboxylate. Under such
A novel cascade Friedel–Crafts alkylation/Michael addition/aromatization reaction of 2‐vinylindoles with α,β‐unsaturated aldehydes has been developed for the construction of functionalized tetrahydrocarbazoles. The products were obtained in up to 97% yield and with excellent stereoselectivities (ee up to>99%, dr up to>99:1).
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
A hydrogen bonding-mediated double Michael addition−aromatization cascade of 2-propenylindoles and nitroolefins has been disclosed. The methodology allows an efficient synthesis of diverse and structurally complex tetrahydrocarbazoles in good to excellent enantioselectivities and diastereoselectivities.
Synthesis of Indole Substituted Twistenediones from a 2-Quinonyl Boronic Acid
作者:Jaime Rojas-Martín、Marcos Veguillas、María Ribagorda、M. Carmen Carreño
DOI:10.1021/ol402689b
日期:2013.11.15
Indole substituted twistane-like derivatives resulted in a reaction between 3,5-dimethyl-2-quinonyl boronic acid and 2-alkenyl indoles. Their MCPBA oxidation gave 6/6/9 caged systems. Boronic acid acts as a temporal promoter allowing a site-selective conjugate addition of the heteroaromatic system to the methyl substituted C-3 quinone carbon, giving an intermediate diene which is regioselectively trapped