caa a22 4500 445876557 CHVBK 20180317145529.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10593-011-0780-6 doi (NATIONALLICENCE)springer-10.1007/s10593-011-0780-6 1,5-Electrocyclization of 1-alkyl- 3-[(2Z)-2,4-diaryl-4-oxobut-2-en-1-yl]-1H-benzimidazol-3-ium bromides [Elektronische Daten] [L. Potikha, A. Turelyk, V. Kovtunenko] Cyclization of 1-alkyl-3-[(2Z)-2,4-diaryl-4-oxobut-2-en-1-yl]-1H-benzimidazol-3-ium bromides occurs in the presence of MeONa at a reduced temperature of 5-10°C via a 1,5-electrocyclization mechanism to give 3a,4-dihydro-3H-pyrrolo[1,2-a]benzimidazoles. These are unstable under the reaction conditions and are readily converted to {1-[2-(alkylamino)phenyl]-4-phenyl-1H-pyrrol-3-yl}(phenyl)methanones. Springer Science+Business Media, Inc., 2011 benzimidazolium ylide nationallicence pyrido[1,2- a ]benzimidazole nationallicence pyrrolo[1,2- a ]benzimidazole nationallicence 1,5-electrocyclization nationallicence Potikha L. Taras Shevchenko National University, 64 Volodymyrs'ka St., 01033, Kyiv, Ukraine aut Turelyk A. Taras Shevchenko National University, 64 Volodymyrs'ka St., 01033, Kyiv, Ukraine aut Kovtunenko V. Taras Shevchenko National University, 64 Volodymyrs'ka St., 01033, Kyiv, Ukraine aut Chemistry of Heterocyclic Compounds Springer US; http://www.springer-ny.com 47/4(2011-07-01), 452-455 0009-3122 47:4<452 2011 47 10593 https://doi.org/10.1007/s10593-011-0780-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10593-011-0780-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Potikha L. Taras Shevchenko National University, 64 Volodymyrs'ka St., 01033, Kyiv, Ukraine aut NATIONALLICENCE 700 1- Turelyk A. Taras Shevchenko National University, 64 Volodymyrs'ka St., 01033, Kyiv, Ukraine aut NATIONALLICENCE 700 1- Kovtunenko V. Taras Shevchenko National University, 64 Volodymyrs'ka St., 01033, Kyiv, Ukraine aut NATIONALLICENCE 773 0- Chemistry of Heterocyclic Compounds Springer US; http://www.springer-ny.com 47/4(2011-07-01), 452-455 0009-3122 47:4<452 2011 47 10593 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer