Aksenov, Dmitrii A.Arutiunov, Nikolai A.Maliuga, Vladimir V.Aksenov, Alexander V.Rubin, Michael2022-09-202022-09-202020-11-26Aksenov, D. A.; Arutiunov, N. A.; Maliuga, V. V.; Aksenov, A. V.; Rubin, M. Beilstein J. Org. Chem. 2020, 16, 2903–2910. doi:10.3762/bjoc.16.239https://hdl.handle.net/1808/33541Imidazo[1,5-a]pyridines were efficiently prepared via the cyclization of 2-picolylamines with nitroalkanes electrophilically activated in the presence of phosphorous acid in polyphosphoric acid (PPA) medium.© 2020 Aksenov et al.; licensee Beilstein-Institut. License and terms: see end of document. This is an Open Access article under the terms of the Creative Commons Attribution Licensehttp://creativecommons.org/licenses/by/4.0/CyclizationHeterocyclesImidazo[1,5-a]pyridinesNitroalkanesPolyphosphoric acidArticle10.3762/bjoc.16.239https://orcid.org/0000-0002-0727-9652https://orcid.org/0000-0003-2675-9093https://orcid.org/0000-0002-2702-5684https://orcid.org/0000-0002-6644-9949https://orcid.org/0000-0002-1668-9311openAccess