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Catalyst-free formal [3 + 2] cycloaddition of stabilized N,N-cyclic azomethine imines to 3-nitrobenzofurans and 3-nitro-4H-chromenes: access to heteroannulated pyrazolo[1,2-a]pyrazoles.
Org Biomol Chem. 2021 Dec 1;19(46):10156-10168. doi: 10.1039/d1ob01377g.
Org Biomol Chem. 2021.
PMID: 34778893
Eco-friendly synthesis of fused pyrano[2,3-b]pyrans via ammonium acetate-mediated formal oxa-[3 + 3]cycloaddition of 4H-chromene-3-carbaldehydes and cyclic 1,3-dicarbonyl compounds.
Osyanin VA, Osipov DV, Semenova IA, Korzhenko KS, Lukashenko AV, Demidov OP, Klimochkin YN.
Osyanin VA, et al. Among authors: korzhenko ks.
RSC Adv. 2020 Sep 16;10(57):34344-34354. doi: 10.1039/d0ra06450e. eCollection 2020 Sep 16.
RSC Adv. 2020.
PMID: 35514419
Free PMC article.
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Divergent Transformations of 2-Nitro-1H-benzo[f]chromenes in Reactions with Alkylidenemalononitriles: Access to Naphtho[2,1-b]furans via Base-Mediated Pyran Ring Contraction.
Korzhenko KS, Yushkova AS, Osipov DV, Rashchepkina DA, Demidov OP, Osyanin VA.
Korzhenko KS, et al.
Org Lett. 2024 Feb 23;26(7):1310-1315. doi: 10.1021/acs.orglett.3c03879. Epub 2024 Feb 8.
Org Lett. 2024.
PMID: 38329453
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