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Nikolaeva OG, Popova OS, Dubonosova IV, Karlutova OY, Dubonosov AD, Bren VA, Minkin VI. Spectral-Luminescent and Ionochromic Properties of Azomethine Imine-Coumarin Conjugates. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222050139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Popova OS, Revinskii YV, Tkachev VV, Utenyshev AN, Karlutova OY, Starikov AG, Dubonosov AD, Bren VA, Aldoshin SM, Minkin VI. Structure, spectral-luminescent and ionochromic properties of hydroxyaryl(hetaryl)idene azomethine imines. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Pušavec Kirar E, Grošelj U, Golobič A, Požgan F, Pusch S, Weber C, Andernach L, Štefane B, Opatz T, Svete J. Absolute Configuration Determination of 2,3-Dihydro-1H,5H-pyrazolo[1,2-a]pyrazoles Using Chiroptical Methods at Different Wavelengths. J Org Chem 2016; 81:11802-11812. [PMID: 27801585 DOI: 10.1021/acs.joc.6b02270] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A correlation between the absolute configuration and chiroptical properties of nonracemic 1,6,7-trisubstituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazoles was studied. A series of 16 novel representatives were prepared by Cu-catalyzed [3 + 2] cycloadditions of racemic (Z)-2-benzylidene-5-oxopyrazolidin-2-ium-1-ides to tert-butyl (S)-(3-oxopent-4-yn-2-yl)carbamate, and their structures were determined by NMR, VCD, ECD, and X-ray diffraction. A clear correlation between the sign of specific rotation and configuration at position C(1) allows for easy determination of the absolute configuration of 1,6,7-trisubstituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazoles by ECD and NMR. While VCD, requiring milligram quantities, allowed the determination of the correct relative and absolute configuration without additional information from other methods, the stereochemical analysis by ECD required knowledge of the relative configuration derived from NMR at a comparable computational level.
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Affiliation(s)
- Eva Pušavec Kirar
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Uroš Grošelj
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Amalija Golobič
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Franc Požgan
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Stefan Pusch
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Carina Weber
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Lars Andernach
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Bogdan Štefane
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Till Opatz
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Jurij Svete
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
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Kharabayev NN, Popova OS, Bren DV, Minkin VI. Azomethine imines of pyrazolidone series and their bis-chelate Ni(II), Zn(II), Cd(II) complexes. Quantum chemical simulation. RUSS J GEN CHEM+ 2016. [DOI: 10.1134/s1070363216070215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Benzenoid-quinoid tautomerism of azomethines and their structural analogs 56. Azomethine imines, derivatives of salicylic and 2-hydroxynaphthoic aldehydes. Russ Chem Bull 2016. [DOI: 10.1007/s11172-016-1350-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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