68742-28-9Relevant articles and documents
SYNTHESIS OF 5-VINYLINDOLE BY SIMULTANEOUS DEHYDROGENATION AND DECARBOXYLATION OF 5-ETHYL-INDOLE-2-CARBOXYLIC ACID AND ITS ETHYL ESTER
Starostenko, N. E.,Dat, Fung Tien,Serova, I. A.,Kamenetskii, A. V.,Suvorov, N. N.
, p. 508 - 511 (1991)
A new method is proposed for the synthesis of 5-vinylindole by simultaneous catalytic dehydrogenation and decarboxylation of 5-ethylindole-2-carboxylic acid and its ethyl ester, making it possible to more than double the yield of the previously described method.
5,5′-alkylsubsituted indigo for solution-processed optoelectronic devices
Watanabe, Motonori,Uemura, Naoki,Ida, Shintaro,Hagiwara, Hidehisa,Goto, Kenta,Ishihara, Tatsumi
, p. 4280 - 4287 (2016/07/06)
A series of alkylated indigos were synthesized. Alkylated indigos were characterized by NMR, mass spectrometry, absorption spectra, cyclic voltammetry, and density functional theory (DFT) calculations. Propyl and butyl group substituted indigo was most soluble in chloroform and 1,2-dicrolobenzene, and these solubility were 65–89 times increased as compared to the parent indigo. DFT calculations suggested that the presence of the alkyl chains at the 5.5′-position increases the energy of the highest occupied molecular orbital, while reducing the energy of the lowest unoccupied molecular orbital. This theoretical finding was in good agreement with the experimental results. Crystal structures obtained by X-ray diffraction showed one-dimensional pi–pi stacking. Alkylated molecules were converted to leuco structure, and these structures were then converted to the corresponding indigos in the film state. After deposition of the films on TiO2/FTO substrate, oxidative photocurrents were observed.
Synthesis and biological evaluation of new dipyrrolo[3,4-a:3,4-c]carbazole-1,3,4,6-tetraones, substituted with various saturated and unsaturated side chains via palladium catalyzed cross-coupling reactions
Henon, Helene,Anizon, Fabrice,Golsteyn, Roy M.,Leonce, Stephane,Hofmann, Robert,Pfeiffer, Bruno,Prudhomme, Michelle
, p. 3825 - 3834 (2007/10/03)
The syntheses of a series of dipyrrolo[3,4-a:3,4-c]carbazole-1,3,4,6-tetraones, substituted in 10-position with saturated and unsaturated side chains, via palladium catalyzed cross-coupling reactions, are described. These compounds can be considered as granulatimide bis-imide analogues. Their inhibitory activity toward Chk1 kinase and their antiproliferative activities in vitro in four tumor cell lines are reported.
