1
|
Semenova IА, Osyanin VА, Demidov OP, Osipov DV. Opening of the Furan Ring of 3-Nitrobenzofurans by the Action of Carbonyl-Stabilized Sulfonium ylides. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03079-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
2
|
Osipov DV, Korzhenko KS, Rashchepkina DA, Artemenko AA, Demidov OP, Shiryaev VA, Osyanin VA. Catalyst-free formal [3 + 2] cycloaddition of stabilized N, N-cyclic azomethine imines to 3-nitrobenzofurans and 3-nitro-4 H-chromenes: access to heteroannulated pyrazolo[1,2- a]pyrazoles. Org Biomol Chem 2021; 19:10156-10168. [PMID: 34778893 DOI: 10.1039/d1ob01377g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We have studied the [3 + 2]-cycloaddition of various N,N-cyclic azomethine imines to 3-nitrobenzofurans. This process is a rare example of their dearomatization. We have also extended this process to the related 3-nitro-4H-chromenes as dipolarophiles. Both reactions provide access to benzofuro- and chromeno-condensed pyrazolo[1,2-a]pyrazoles with 100% atom economy in a diastereoselective manner under mild eco-friendly conditions. Finally, on the basis of DFT calculations, the mechanistic insights into the mentioned [3 + 2]-cycloadditions and explanations of the experimentally determined limitations of the method are given. Hirshfeld atomic charge values of push-pull heterocycles were suggested as a criterion for a priori assessment of the possibility of their dipolar cycloaddition with N,N-cyclic azomethine imines.
Collapse
Affiliation(s)
- Dmitry V Osipov
- Department of Organic Chemistry, Chemical Technological Faculty, Samara State Technical University, 244 Molodogvardeyskaya St., Samara 443100, Russia.
| | - Kirill S Korzhenko
- Department of Organic Chemistry, Chemical Technological Faculty, Samara State Technical University, 244 Molodogvardeyskaya St., Samara 443100, Russia.
| | - Daria A Rashchepkina
- Department of Organic Chemistry, Chemical Technological Faculty, Samara State Technical University, 244 Molodogvardeyskaya St., Samara 443100, Russia.
| | - Alina A Artemenko
- Department of Organic Chemistry, Chemical Technological Faculty, Samara State Technical University, 244 Molodogvardeyskaya St., Samara 443100, Russia.
| | - Oleg P Demidov
- Department of Chemistry, North Caucasus Federal University, 1 Pushkin St., Stavropol 355009, Russia
| | - Vadim A Shiryaev
- Department of Organic Chemistry, Chemical Technological Faculty, Samara State Technical University, 244 Molodogvardeyskaya St., Samara 443100, Russia.
| | - Vitaly A Osyanin
- Department of Organic Chemistry, Chemical Technological Faculty, Samara State Technical University, 244 Molodogvardeyskaya St., Samara 443100, Russia.
| |
Collapse
|