59007-79-3Relevant academic research and scientific papers
BENZIMIDAZOLE COMPOUND AND SYNTHESIS METHOD THEREOF
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Paragraph 0045-0048, (2017/08/08)
PROBLEM TO BE SOLVED: To provide a novel benzimidazole compound having tetracyclic condensed ring and a synthesis method thereof. SOLUTION: A benzimidazole compound is represented by the formula (I). A method for synthesizing the benzimidazole compound represented by the formula (I) includes the step of reacting ortho-phenylene diamine and a lactone compound and further reacting the resulting benzimidazole compound with the lactone compound. In the formula, R1 and R4 are each independently H, a methyl group or an ethyl group excluding that two of R4 are ethyl groups or methyl groups at same time, R2 and R3 are each independently H or a methyl group, m and n are integers of 1 to 2 and n is 1 when m is 2. SELECTED DRAWING: None COPYRIGHT: (C)2017,JPOandINPIT
Synthesis of condensed heterocycles via cyclopropylimine rearrangement of cyclopropylazoles
Tomilov, Yury V.,Platonov, Dmitry N.,Frumkin, Aleksandr E.,Lipilin, Dmitry L.,Salikov, Rinat F.
supporting information; experimental part, p. 5120 - 5123 (2010/11/16)
Thermal cyclopropylimine rearrangement of cyclopropylazoles into condensed heterocycles and factors affecting the regioselectivity and conversion are reported. A method of conducting the reaction in the absence of solvents is developed. A series of 2-cyclopropylazoles, including novel examples, is synthesized and their transformations into the corresponding condensed heterocyclic compounds (2,3-dihydro-1H-pyrroles and 6,7-dihydro-5H-pyrrolo[2,1- b]thiazolium salts) are studied.
A REGIOSELECTIVE METAL CATALYZED SYNTHESIS OF ANNELATED BENZIMIDAZOLES AND AZABENZIMIDAZOLES
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Page/Page column 28, (2009/03/07)
A regioselective metal catalyzed synthesis of benzimidazoles and azabenzimidazoles The present invention relates to a process for the regioselective synthesis of compounds of the formula (I), wherein R1; R2; R3; R4; J1; J2; J3; J4 and G have the meanings indicated in the claims. The present invention provides a direct metal, e.g. palladium or copper, catalyzed, regioselective process to a wide variety of unsymmetrical, multifunctional N- substituted benzimidazoles or azabenzimidazoles of formula (I) starting from 2-halo- nitroarenes and N-substituted amides useful for the production of pharmaceuticals, diagnostic agents, liquid crystals, polymers, herbicides, fungicidals, nematicidals, parasiticides, insecticides, acaricides and arthropodicides.
Structure-activity studies of antitumor agents based on pyrrolo[1,2-a]benzimidazoles: New reductive alkylating DNA cleaving agents
Islam,Skibo,Dorr,Alberts
, p. 2954 - 2961 (2007/10/02)
Described herein are structure-activity studies of new antitumor agents based on the pyrrolo[1,2-a]benzimidazole (PBI) ring system. These compounds were designed as new DNA cross-linkers mimicking the mitomycin antitumor agents. Actually, the PBI derivati
Process for preparing 1,2-fused-1,3-dinitrogen-heterocyclic compounds
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, (2008/06/13)
1,2-FUSED FIVE-MEMBERED OR SIX-MEMBERED 1,3-DINITROGEN-HETEROCYCLIC COMPOUNDS, USFUL AS ANTI-CORROSION AGENTS, HAVING THE FORMULA STR1 wherein A is an optionally substituted, optionally polynuclear orth- or peri-arylene radical and B is an optionally substituted alkylene chain STR2 WHEREIN R1 and R2 individually represent hydrogen and/or optionally substituted aliphatic, cycloaliphatic, araliphatic or aromatic radicals and n represents a number from 3 to 6, Or B is an optionally substituted 1,8-naphthylene, 2,2'-diphenylene or 4,5-phenanthrylene radical, Are prepared by splitting a five-membered or six-membered 1,3- dinitrogen-heterocyclic compound, which contains a 2-(ω-amino group) side chain, having the formula STR3 wherein A and B have the meanings indicated above and R3 and R4 are hydrogen, lower alkyl, cycloalkyl or aralkyl but at least one of the two radicals R3 and R4 must represent hydrogen.
