1999
DOI: 10.1007/bf02496195
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1,2-diphenylbenzoimidazole

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Cited by 3 publications
(2 citation statements)
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“…The 4-anilinoquinazolines 4 host a N , N ′-disubstituted benzamidine motif within their structures, cyclization of which affords the desired benzo­[4,5]­imidazo­[1,2- c ]­quinazolines. The literature on the preparation of benzo- or hetareno-fused imidazoles from amidines via oxidative C–N coupling highlighted the use of electro-oxidation and the use of a variety of oxidants including H 2 O 2 , cerium ammonium nitrate (CAN), NaOCl, NCS, MnO 2 , Pb­(OAc) 4 , , and hypervalent iodine­(III) reagents . In our hands, cyclization efforts using either H 2 O 2 , CAN, NCS, MnO 2 , or Pb­(OAc) 4 failed but succeeded with hypervalent iodine­(III) reagents.…”
Section: Resultsmentioning
confidence: 95%
“…The 4-anilinoquinazolines 4 host a N , N ′-disubstituted benzamidine motif within their structures, cyclization of which affords the desired benzo­[4,5]­imidazo­[1,2- c ]­quinazolines. The literature on the preparation of benzo- or hetareno-fused imidazoles from amidines via oxidative C–N coupling highlighted the use of electro-oxidation and the use of a variety of oxidants including H 2 O 2 , cerium ammonium nitrate (CAN), NaOCl, NCS, MnO 2 , Pb­(OAc) 4 , , and hypervalent iodine­(III) reagents . In our hands, cyclization efforts using either H 2 O 2 , CAN, NCS, MnO 2 , or Pb­(OAc) 4 failed but succeeded with hypervalent iodine­(III) reagents.…”
Section: Resultsmentioning
confidence: 95%
“…An attempt to synthesize polyfluorinated benzimidazoles from guanidines (e.g., from guanidine 82d) under standard conditions of intramolecular heterocyclization of polyfluoroaromatic compounds (K 2 CO 3 /DMF) led to more profound transformations, with subsequent intramolecular cyclization in benzimidazole 83a, as confirmed by a separate transformation of this benzimidazole into compound 84. Since fluorinated benzimidazoles possess physiological activity [49,50], and N-phenylbenzimidazoles are models of the unit cell of thermally stable N-phenylpolybenzimidazoles [51], reactions leading to these compounds are also of interest.…”
Section: Reactions With Nucleophilic Reagentsmentioning
confidence: 99%