biostudies-literatureSayapin YAState Assignment for Research SSC RASMinistry of Science and Higher Education of the Russian FederationNational Foundation for Science and Technology DevelopmentState assignment for ResearchRussian Foundation for Basic Research18226-18234https://www.ebi.ac.uk/biostudies/studies/S-EPMC8296560biostudies-literatureUnknown6(28)Derivatives of 2-(2-indolyl)-cyclopenta[b]pyrrole-3,4-diones and pyrindino[1,2-a]indoles were synthesized by a new reaction of contraction of the <i>o</i>-quinone ring, and their structures were investigated by X-ray crystallography and nuclear magnetic resonance spectroscopy. The mechanisms of the reactions were suggested based on density functional theory calculations of the critical parts of the potential energy surfaces.ACS omegaNew Reactions of Contraction of the <i>o</i>-Quinone Ring with the Formation of Derivatives of 2-(2-Indolyl)-cyclopenta[b]pyrrole-3,4-diones and Pyrindino[1,2-a]indoles: A Combined Experimental and Density Functional Theory Investigation.PMC829656017-53-540003_Viet_a????????-??19-119092390076-70852-2020-0031104.01-2015.6801201354239Tran DLSayapin YAA Krasnikova TTkachev VVBang DNTupaeva IOM Aldoshin SA Gusakov EDuong TNNguyen TVDorogan IVVu Dinh HMinkin VIfalseNew Reactions of Contraction of the <i>o</i>-Quinone Ring with the Formation of Derivatives of 2-(2-Indolyl)-cyclopenta[b]pyrrole-3,4-diones and Pyrindino[1,2-a]indoles: A Combined Experimental and Density Functional Theory Investigation.Derivatives of 2-(2-indolyl)-cyclopenta[b]pyrrole-3,4-diones and pyrindino[1,2-a]indoles were synthesized by a new reaction of contraction of the <i>o</i>-quinone ring, and their structures were investigated by X-ray crystallography and nuclear magnetic resonance spectroscopy. The mechanisms of the reactions were suggested based on density functional theory calculations of the critical parts of the potential energy surfaces.2021-01-01T00:00:00Z2021 Jul2025-04-26T03:53:18.163Z2022-02-10T23:06:43.818ZS-EPMC82965603430805310.1021/acsomega.1c02033