10066-20-3Relevant academic research and scientific papers
Effect of substituents on spin density in benzimidazole nitronyl nitroxide radicals studied by electron spin resonance
Esat, Burak,Fidan, Ismail,Bahceci, Sumeyye,Yerli, Yusuf,Sari, Levent
scheme or table, p. 641 - 650 (2010/06/21)
Several novel benzimidazole-3-oxide-1-oxyl radicals with substituents at 5 and/or 6 position were synthesized. The ESR analysis of nitrogen hyperfine coupling constants (hfccs) revealed that substituents at 5 and 6-position affect the spin density to greater extent than substituents on the phenyl ring at 2-position. Density functional theory calculations of nitrogen hfccs were performed using several different Pople type basis sets, as well as double and triple zeta quality individual gauge for localized orbital (IGLO-II, IGLO-III) and electron paramagnetic resonance (EPR-II, EPR-II) basis sets. Experimental and theoretical hfccs are compared.
Isolation of crystals of a planar nitronyl nitroxide radical: 2-phenylbenzimidazol-1-yl N,N′-dioxide (PBIDO)
Kusaba, Yoshio,Tamura, Masafumi,Hosokoshi, Yuko,Kinoshita, Minoru,Sawa, Hiroshi,Kato, Reizo,Kobayashi, Hayao
, p. 1377 - 1382 (2007/10/03)
A planar nitronyl nitroxide radical, 2-phenylbenzimidazol-1-yl N,N′-dioxide, has been isolated in a stable single crystal form. X-Ray analysis has shown that the radical molecules form a dimeric two-dimensional structure. The dominant magnetic interaction
Studies on the Reaction of o-Benzoquinone Dioxime with Aldehydes: An Improved Procedure for 1-Hydroxybenzimidazole 3 -Oxides
Paetzold, F.,Niclas, H.-J.,Gruendemann, E.
, p. 345 - 350 (2007/10/02)
An improved method for the preparation of the title compounds 4 is described.Thus, 1-hydroxybenzimidazole 3-oxides are obtained in high yields by the reaction of o-benzoquinone dioxime 1 with aromatic and heteroaromatic substituted aldehydes 2 in the pres
Formation of α-Nitrosonitrones from Nitrile Oxides and Nitrosoarenes
Gilchrist, Thomas L.,Gordon, Paul F.,Rees, Charles W.
, p. 1216 - 1227 (2007/10/02)
Reinvestigation of the reaction between benzonitrile oxide and nitrosobenzene has shown that the unstable 1:1 adduct, an α-nitrosonitrone, can cyclise in two ways, giving 1-hydroxybenzimidazole 3-oxide or a deoxygenated product 3-phenyl-4H-1,2,4-benzoxadiazine.The corresponding benzo-oxadiazines were also isolated from the reactions of nitrosobenzene with 4-methylbenzonitrile oxide and with ethyl cyanoformate N-oxide.Nitrosomesitylene also gave α-nitrosonitrones with nitrile oxides but these could not be induced to cyclise: deoxygenation by tributylphosphine resulted in preferential removal of the oxygen of the nitroso group.With benzonitrile N-phenylimide, nitrosomesitylene gave a similar 1:1 adduct.
A NOVEL RING TRANSFORMATION OF BENZOFUROXANES TO 1-HYDROXY-2-ARYL-BENZIMIDAZOLE-3-N-OXIDE WITH NITRONES
Borah, Harsha Narayan,Boruah, Romesh Chandra,Sandhu, Jagir Singh
, p. 1625 - 1628 (2007/10/02)
Benzofuroxanes (1) react with nitrones (2) to give 1-hydroxy-2-aryl-benzimidazole-3-N-oxide (3) in good yields.
