resulted the most stable in gas phase. Infrared spectroscopy was used to study solid state behavior identifying experimentally the N-O stretching near to 1380, 1365 and 1225 cm(-1) and the vibrational benzimidazole skeleton near to 1610 and 1590 cm(-1). The vibrational spectrum was satisfactorily described by DFT calculations funding the N-O stretching as a coupled vibration near to 1470, 1350 and 1285
A Common, Facile and Eco-Friendly Method for the Reduction of Nitroarenes, Selective Reduction of Poly-Nitroarenes and Deoxygenation of <i>N</i>
-Oxide Containing Heteroarenes Using Elemental Sulfur
作者:Angel H. Romero、Hugo Cerecetto
DOI:10.1002/ejoc.202000064
日期:2020.3.31
A facile and convenient protocol for the reduction of nitro‐arenes and deoxygenation of heteroarenes N‐oxides under transition metal and additive free conditions has been developed. The strategy allows the selective reduction of poly‐nitroarenes as well as the efficient deoxygetaion of a variety of N‐oxides containing heteroarenes including benzofuroxanes and phenzines with a broad substrate scope
Second generation of 2H-benzimidazole 1,3-dioxide derivatives as anti-trypanosomatid agents: Synthesis, biological evaluation, and mode of action studies
作者:Mariana Boiani、Lucía Boiani、Alicia Merlino、Paola Hernández、Agustina Chidichimo、Juan J. Cazzulo、Hugo Cerecetto、Mercedes González
DOI:10.1016/j.ejmech.2009.06.014
日期:2009.11
Exploring the influence of different substitution patterns of 2H-benzimidazole 1,3-dioxide derivatives (BzNO) we prepared fifteen new derivatives. Initially the BzNO were tested against Trypanosoma cruzi Tulahuen 2 strain epimastigote form rendering very potent anti-T. cruzi agents. Moreover, the BzNO were able to inhibit the growth of virulent and resistant to Benznidazole strains (CL Brener clone, Colombiana, and Y strains) and to Leishmania braziliensis. Interestingly, BzNO exhibited very high selectivity index and particularly the spiro-BzNO 13 provokes an important diminution of amastigotes in Vero cells. Besides, it was found a diminution of acetate and glycine as excreted metabolites but without increase of parasite glucose uptake indicating that the glycosome is probably not involucrate in the 2H-benzimidazole 1,3-dioxides mechanism of action. (C) 2009 Elsevier Masson SAS. All rights reserved.