203394-30-3Relevant articles and documents
The base-free van Leusen reaction of cyclic imines on water: Synthesis of N-fused imidazo 6,11-dihydro β-carboline derivatives
Satyam, Killari,Murugesh,Suresh, Surisetti
supporting information, p. 5234 - 5238 (2019/06/07)
Construction of imidazoles has been demonstrated on water under base-free conditions. The reaction of dihydro β-carboline imines and p-toluenesulfonylmethyl isocyanides furnished the corresponding substituted N-fused imidazo 6,11-dihydro β-carboline derivatives in very good yields under ambient conditions. The use of deuterium oxide (D2O) as a solvent enabled the incorporation of deuterium isotopes in the imidazole ring.
Green, Catalyst-Free Reaction of Indoles with β-Fluoro-β-nitrostyrenes in Water
Aldoshin, Alexander S.,Tabolin, Andrey A.,Ioffe, Sema L.,Nenajdenko, Valentine G.
, p. 3816 - 3825 (2018/07/31)
The reaction of 2-fluoro-2-nitrostyrenes with various indoles was investigated. We found that the reaction proceeds as a Michael addition in a highly regioselective manner to form 3-(1-aryl-2-fluoro-2-nitroethyl)-1H-indoles. Thus, a green and catalyst-free synthesis of these compounds was developed using water as a reaction medium. The high effectiveness of this approach was demonstrated through the preparation of target products in up to 92 % isolated yield. Subsequent reduction of the nitro group was investigated. We found that due to the instability of the intermediate α-fluoro amines, the reduction led to non-fluorinated tryptamine derivatives.
Ionic liquid-coordinated ytterbium(III) sulfonate catalyzed michael addition of indoles to electron-deficient nitroolefins
Shen, Wei,Wang, Limin,Tang, Jun,Qian, Zhenhua,Tong, Xiaofeng
experimental part, p. 443 - 448 (2010/10/20)
The Michael addition of indoles to electron-deficient nitroolefins was effectively catalyzed by an ionic liquid-coordinated ytterbium(III) sulfonate catalyst. The recycling procedure of the catalyst was very simple without extraction with water, and the c
Synthesis of 4-(p-methoxyphenyl)-β-carboline, a new inhibitor of cellular calcium influx
Busacca, Carl A.,Dong, Yong
, p. 501 - 509 (2007/10/03)
4-(p-methoxyphenyl)-β-carboline was prepared in four steps from indole. The key step involved palladium-catalyzed dehydrogenation of a dihydro-β- carboline dichlorophosphinic acid salt. The success of the dehydrogenation was found to depend on the catalys