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Antonov AS, Karpov VV, Tupikina EY, Tolstoy PM, Vovk MA. Aggregation Behavior of Lithionaphthalenes in Solution: Experimental and Theoretical Study. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00524] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander S. Antonov
- St. Petersburg State University, Institute of Chemistry, Universitetskii pr. 26, 198504 St. Petersburg, Russian Federation
| | - Valerii V. Karpov
- St. Petersburg State University, Institute of Chemistry, Universitetskii pr. 26, 198504 St. Petersburg, Russian Federation
| | - Elena Yu. Tupikina
- St. Petersburg State University, Institute of Chemistry, Universitetskii pr. 26, 198504 St. Petersburg, Russian Federation
| | - Peter M. Tolstoy
- St. Petersburg State University, Institute of Chemistry, Universitetskii pr. 26, 198504 St. Petersburg, Russian Federation
| | - Mikhail A. Vovk
- St. Petersburg State University, Institute of Chemistry, Universitetskii pr. 26, 198504 St. Petersburg, Russian Federation
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Synthesis of 2‐Aryl‐ and 2,7‐Diaryl‐1,8‐bis(dimethylamino)naphthalenes. Overview of the “Buttressing effect” in 2,7‐Disubstituted Proton Sponges. ChemistrySelect 2020. [DOI: 10.1002/slct.202002745] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Antonov AS, Pozharskii AF, Tolstoy PM, Filarowski A, Khoroshilova OV. 1,8-Bis(dimethylamino)naphthyl-2-ketimines: Inside vs outside protonation. Beilstein J Org Chem 2018; 14:2940-2948. [PMID: 30546478 PMCID: PMC6278759 DOI: 10.3762/bjoc.14.273] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 11/15/2018] [Indexed: 11/26/2022] Open
Abstract
The structure and protonation behaviour of four ortho-arylketimines of 1,8-bis(dimethylamonio)naphthalene with a different number of methoxy groups in an aromatic substituent were investigated in solution by NMR (acetone, DMSO, MeCN), in solid state by X-ray analysis and in the gas phase by DFT calculations. Both mono- and diprotonated species were considered. It has been shown that E-isomers of neutral imines can be stabilised by an intramolecular C=N−H···OMe hydrogen bond with a neighbouring methoxy group. Electron-donating OMe groups dramatically increase the basicity of the imino nitrogen, forcing the latter to abstract a proton from the proton sponge moiety in monoprotonated forms. The participation of the out-inverted and protonated 1-NMe2 group in the Me2N−H···NH=C hydrogen bond is experimentally demonstrated. It was shown that the number and position of OMe groups in the aromatic substituents strongly affects the rate of the internal hindered rotation of the NH2+ fragment in dications.
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Affiliation(s)
- A S Antonov
- Department of Organic Chemistry, Southern Federal University, Zorge str. 7, 344090 Rostov-on-Don, Russian Federation.,Institute of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg, Russian Federation
| | - A F Pozharskii
- Department of Organic Chemistry, Southern Federal University, Zorge str. 7, 344090 Rostov-on-Don, Russian Federation
| | - P M Tolstoy
- Institute of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg, Russian Federation
| | - A Filarowski
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland.,Department of Physics, Industrial University of Tyumen, Volodarskogo 38, 625-000 Tyumen, Russian Federation
| | - O V Khoroshilova
- Institute of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg, Russian Federation
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Wang Q, Xu L, Niu Y, Yuan MS, Zhang Y. Exceedingly Large Stokes Shift Induced by Low-Barrier H-Bond-Assisted Internal Charge Transfer. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qin Wang
- College of Chemistry & Pharmacy; Northwest A&F University; Yangling Shaanxi 712100 P. R. China
| | - Longfei Xu
- College of Chemistry & Pharmacy; Northwest A&F University; Yangling Shaanxi 712100 P. R. China
| | - Yahui Niu
- College of Chemistry & Pharmacy; Northwest A&F University; Yangling Shaanxi 712100 P. R. China
| | - Mao-Sen Yuan
- College of Chemistry & Pharmacy; Northwest A&F University; Yangling Shaanxi 712100 P. R. China
| | - Yanrong Zhang
- College of Chemistry & Pharmacy; Northwest A&F University; Yangling Shaanxi 712100 P. R. China
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Antonov AS, Kachalkina SG, Pozharskii AF, Borodkin GS, Filarowski A. Reaction of 2-trifluoroacetyl-1,8-Bis(dimethylamino)naphthalene with strong organic bases: Deprotonation of 1-NMe 2 group resulting in the formation of Benzo[g]indole derivatives versus nucleophilic addition to C O group. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.05.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Niu YP, Zhang JK, Wang XW, Ma XF, Cai JQ, Zhou N, Zheng ZW, Hua RM. X-ray structure and conformational study of tris(2-(dimethylamino)phenyl)methanol: Roles of hydrogen bond in conformational conversions of molecules. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Base-promoted transformation of 2-C(O)R-1,8-bis(dimethylamino)naphthalenes into benzo[g]indole derivatives. MENDELEEV COMMUNICATIONS 2015. [DOI: 10.1016/j.mencom.2015.05.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Antonov AS, Pozharskii AF, Ozeryanskii VA, Filarowski A, Suponitsky KY, Tolstoy PM, Vovk MA. Ring lithiation of 1,8-bis(dimethylamino)naphthalene: another side of the ‘proton sponge coin’. Dalton Trans 2015; 44:17756-66. [DOI: 10.1039/c5dt02482j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A set of X-ray, multinuclear NMR and DFT approaches was used to address a question of selectivity, relative stability and enhanced reactivity of ring lithiated 1,8-bis(dimethylamino)naphthalenes.
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Affiliation(s)
- Alexander S. Antonov
- Department of Organic Chemistry
- Southern Federal University
- 344090 Rostov-on-Don
- Russian Federation
| | - Alexander F. Pozharskii
- Department of Organic Chemistry
- Southern Federal University
- 344090 Rostov-on-Don
- Russian Federation
| | - Valery A. Ozeryanskii
- Department of Organic Chemistry
- Southern Federal University
- 344090 Rostov-on-Don
- Russian Federation
| | - Aleksander Filarowski
- Faculty of Chemistry
- University of Wroclaw
- 50-383 Wroclaw
- Poland
- Frank Laboratory of Neutron Physics
| | - Kyrill Yu. Suponitsky
- Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Peter M. Tolstoy
- Department of Chemistry
- St. Petersburg State University
- 198504 St. Petersburg
- Russian Federation
| | - Mikhail A. Vovk
- Department of Chemistry
- St. Petersburg State University
- 198504 St. Petersburg
- Russian Federation
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Ozeryanskii VA, Pozharskii AF, Antonov AS, Filarowski A. Out-basicity of 1,8-bis(dimethylamino)naphthalene: the experimental and theoretical challenge. Org Biomol Chem 2014; 12:2360-9. [PMID: 24522408 DOI: 10.1039/c3ob41986j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A possibility of non-conventional two-step protonation of 1,8-bis(dimethylamino)naphthalene (proton sponge) is discussed. Unlike the generally accepted mechanism, involving relatively slow direct penetration of a proton into the cleft between the peri-NMe2 groups, it consists of the rapid addition of a proton to the out-inverted NMe2 group with the subsequent slower rotational transfer of the proton into the inter-nitrogen space to produce a stable chelated cation. The following approaches were employed during the work: (1) competitive hydrogen bond formation in a specially designed alcohol in which the OH group might chelate either the proton sponge 1-NMe2 group or another basic center (N,N-dimethylaniline) of known basicity; (2) measuring the basicity of naphtho[1,8-b,c]diazabicyclo[3.3.3]undecane considered to be a close analogue of the proton sponge capable exclusively of out-protonation; (3) X-ray, spectral and DFT studies of structure, energy and stereodynamics of compounds obtained, including their conformers. For the first time, the pKa value of an organic base with a perfectly flat nitrogen atom is reported. The final conclusion is made that both pathways of proton sponge protonation, traditional and non-conventional, contribute in parallel with a still undefined ratio. The estimated out-basicity of the proton sponge is at least 5.5 orders of magnitude lower than the directly measured in-basicity.
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Affiliation(s)
- Valery A Ozeryanskii
- Department of Organic Chemistry, Southern Federal University, Zorge str. 7, 344090 Rostov-on-Don, Russian Federation.
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Kögel JF, Xie X, Baal E, Gesevičius D, Oelkers B, Kovačević B, Sundermeyer J. Superbasic Alkyl‐Substituted Bisphosphazene Proton Sponges: Synthesis, Structural Features, Thermodynamic and Kinetic Basicity, Nucleophilicity and Coordination Chemistry. Chemistry 2014; 20:7670-85. [DOI: 10.1002/chem.201402226] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Julius F. Kögel
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
| | - Xiulan Xie
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
| | - Eduard Baal
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
| | - Donatas Gesevičius
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
| | - Benjamin Oelkers
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
| | - Borislav Kovačević
- Quantum Chemistry Group, Rudjer Bošković Institute, Bijenička c. 54, 10000 Zagreb (Croatia)
| | - Jörg Sundermeyer
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
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Sibrian-Vazquez M, Escobedo JO, Lowry M, Fronczek FR, Strongin RM. Field effects induce bathochromic shifts in xanthene dyes. J Am Chem Soc 2012; 134:10502-8. [PMID: 22642754 PMCID: PMC3384756 DOI: 10.1021/ja302445w] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
There is ongoing interest in near-infrared (NIR) absorbing and emitting dyes for a variety of biomedical and materials applications. Simple and efficient synthetic procedures enable the judicious tuning of through-space polar (field) effects as well as low barrier hydrogen bonding to modulate the HOMO-LUMO gap in xanthene dyes. This affords unique NIR-absorbing xanthene chromophores.
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Affiliation(s)
- Martha Sibrian-Vazquez
- Department of Chemistry, Portland State University, 1719 SW 10th Ave., Portland, Oregon 97201, United States
| | - Jorge O. Escobedo
- Department of Chemistry, Portland State University, 1719 SW 10th Ave., Portland, Oregon 97201, United States
| | - Mark Lowry
- Department of Chemistry, Portland State University, 1719 SW 10th Ave., Portland, Oregon 97201, United States
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States
| | - Robert M. Strongin
- Department of Chemistry, Portland State University, 1719 SW 10th Ave., Portland, Oregon 97201, United States
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Pozharskii AF, Ozeryanskii VA. Proton Sponges and Hydrogen Transfer Phenomena. MENDELEEV COMMUNICATIONS 2012. [DOI: 10.1016/j.mencom.2012.05.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Basu A, Das G. Amidothiourea as a potential receptor for organic bases by resonance assisted low barrier hydrogen bond formation: Structure and Hirshfeld surface analysis. CrystEngComm 2012. [DOI: 10.1039/c2ce06541j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Three examples of naphthalene proton sponges with extreme or unusual structural parameters. General view on factors influencing proton sponge geometry. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.07.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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