145326-40-5Relevant academic research and scientific papers
Ligand-free copper-catalyzed synthesis of substituted benzimidazoles, 2-aminobenzimidazoles, 2-aminobenzothiazoles, and benzoxazoles
Saha, Prasenjit,Ramana, Tamminana,Purkait, Nibadita,Ali, Md. Ashif,Paul, Rajesh,Punniyamurthy, Tharmalingam
supporting information; experimental part, p. 8719 - 8725 (2010/02/28)
(Chemical Equation Presented) The synthesis of substituted benzimidazoles, 2-aminobenzimidazoles, 2-aminobenzothiazoles, and benzoxazoles is described via intramolecular cyclization of o-bromoaryl derivatives using copper(II) oxide nanoparticles in DMSO under air. The procedure is experimentally simple, general, efficient, and free from addition of external chelating ligands. It is a heterogeneous process and the copper(II) oxide nanoparticles can be recovered and recycled without loss of activity. 2009 American Chemical Society.
Triazolines. Part 32. Synthesis of 1-Alkyl-2-aminobenzimidazoles from 5-Amino-1-(2-nitroaryl)-1,2,3-triazolines
Erba, Emanuela,Mai, Giorgio,Pocar, Donato
, p. 2709 - 2712 (2007/10/02)
5-Amino-1-(2-nitroaryl)-1,2,3-triazolines 5 are converted into 1-alkyl-2-aminobenzimidazoles 7 in refluxing triethyl phosphite.The reaction occurs via thermal rearrangement of 5 followed by nitrogen elimination which produces N2-(2-nitroaryl)am
