5638-73-3Relevant academic research and scientific papers
Incorporating Morpholine and Oxetane into Benzimidazolequinone Antitumor Agents: The Discovery of 1,4,6,9-Tetramethoxyphenazine from Hydrogen Peroxide and Hydroiodic Acid-Mediated Oxidative Cyclizations
Conboy, Darren,Mirallai, Styliana I.,Craig, Austin,McArdle, Patrick,Al-Kinani, Ali A.,Barton, Stephen,Aldabbagh, Fawaz
, p. 9811 - 9818 (2019)
The reactivity of hydrogen peroxide and catalytic hydroiodic acid toward 3,6-dimethoxy-2-(cycloamino)anilines is tunable to give ring-fused benzimidazoles or 1,4,6,9-tetramethoxyphenazine in high yield. Mechanisms via a detected nitroso-intermediate are p
Synthesis of rutaecarpine alkaloids: Via an electrochemical cross dehydrogenation coupling reaction
Li, Qian-Yu,Cheng, Shi-Yan,Tang, Hai-Tao,Pan, Ying-Ming
, p. 5517 - 5520 (2019/10/28)
Substrates are directly oxidized at the anode without using any metal catalyst and oxidant to obtain a series of nitrogen heterocyclic compounds, including benzimidazoles and quinolinones. These compounds are highly tolerant to various functional groups and heterocycle-containing substrates. In addition, natural alkaloids, such as rutaecarpine and deoxyvasicinone, can be synthesized by this method.
Formic acid as a sustainable and complementary reductant: An approach to fused benzimidazoles by molecular iodine-catalyzed reductive redox cyclization of: O -nitro- t -anilines
Nguyen,Ermolenko,Al-Mourabit
supporting information, p. 2966 - 2970 (2016/06/09)
Molecular iodine was found to be an excellent catalyst for reductive redox cyclization of o-nitro-t-anilines 1 into fused tricyclic or 1,2-disubtituted benzimidazoles 2. A range of functional groups such as halides (F, Cl, Br), methoxy, ester, trifluoromethyl, cyano, pyridine and even nitro groups were tolerated using formic acid as a clean, safe, user-friendly and complementary reductant. When iodine was used in a stoichiometric amount (50 mol%), the methodology allowed the direct synthesis of benzimidazole hydroiodides 2·HI in high yields by simple precipitation from the reaction mixture.
Copper-catalyzed ortho-C-H amination of protected anilines with secondary amines
Martinez, Angel Manu,Rodriguez, Nuria,Arrayas, Ramon Gomez,Carretero, Juan C.
supporting information, p. 2801 - 2803 (2014/03/21)
A practical Cu-catalyzed picolinamide-directed o-amination of anilines showing excellent mono-substitution selectivity and high functional group tolerance has been developed.
Copper-catalyzed benzylic C(sp3)-H alkoxylation of heterocyclic compounds
Takemura, Noriaki,Kuninobu, Yoichiro,Kanai, Motomu
supporting information, p. 2528 - 2532 (2014/04/17)
We achieved intra- and intermolecular C(sp3)-H alkoxylation of benzylic positions of heteroaromatic compounds using CuBrn (n = 1, 2)/5,6-dimethylphenanthroline (or 4,7-dimethoxyphenanthroline) and ( tBuO)2 as a
