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Ciou JM, Zhu HF, Chang CW, Chen JY, Lin YF. Physical organic studies and dynamic covalent chemistry of picolyl heterocyclic amino aminals. RSC Adv 2020; 10:40421-40427. [PMID: 35520848 PMCID: PMC9057465 DOI: 10.1039/d0ra08527h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 10/30/2020] [Indexed: 12/03/2022] Open
Abstract
A dynamic covalent system of the picolyl heterocyclic amino aminals has been studied. The aminals are characterized as a metastable species and easily switch to other forms via external stimuli. The solvent, temperature, acid-base and substituent effects have been examined to evaluate the dynamic covalent system. The results reveal that a more polar solvent, a lower temperature, basic conditions and an electron-withdrawing moiety contribute to the stabilities of aminals. The existence of the n → π* interaction between acetonitrile and the C[double bond, length as m-dash]N moiety makes the N-pyrimidyl imine (4c and 4d) yield higher in CD3CN. In a similar fashion, all aminals tend to convert to the corresponding hemiaminal ethers in a methanol environment. According to these findings, we successfully synthesized the following species: (a) N-2-picolylpyrimidin-2-amine 6c obtained by reduction using acetonitrile as the specific solvent; (b) a picolyl aromatic amino aminal 3e prepared from 2-pyridinecarboxaldehyde and the electron withdrawing 2-methoxy-5-nitroaniline.
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Affiliation(s)
- Ji-Ming Ciou
- Department of Fragrance and Cosmetic Science, Kaohsiung Medical University 100 Shi-Chuan 1st Rd., San-Ming Dist. Kaohsiung 80708 Taiwan
| | - Hong-Feng Zhu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University Kaohsiung 80708 Taiwan
| | - Chia-Wen Chang
- Department of Fragrance and Cosmetic Science, Kaohsiung Medical University 100 Shi-Chuan 1st Rd., San-Ming Dist. Kaohsiung 80708 Taiwan
| | - Jing-Yun Chen
- Department of Fragrance and Cosmetic Science, Kaohsiung Medical University 100 Shi-Chuan 1st Rd., San-Ming Dist. Kaohsiung 80708 Taiwan
| | - Ya-Fan Lin
- Department of Fragrance and Cosmetic Science, Kaohsiung Medical University 100 Shi-Chuan 1st Rd., San-Ming Dist. Kaohsiung 80708 Taiwan
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University Kaohsiung 80708 Taiwan
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2
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Azpeitia S, Barquín M, Mendicute-Fierro C, Huertos MA, Rodríguez-Diéguez A, Seco JM, San Sebastian E, Ibarlucea L, Garralda MA. (Diphenylphosphino)alkylaldehyde affords hydride- or alkyl-[(diphenylphosphino)alkylacyl]rhodium(iii) or (diphenylphosphino)alkylester complexes: theoretical and experimental diastereoselectivity. Dalton Trans 2019; 48:3300-3313. [PMID: 30778458 DOI: 10.1039/c8dt04929g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The reaction of [RhCl(COD)]2 (COD = 1,5-cyclooctadiene) with racemic PPh2(CH(Ph)CH2CHO) and pyridine (py) led to the oxidative addition of the aldehyde, and a single geometric isomer of [RhHCl(PPh2(CH(Ph)CH2CO))(py)2] (1), with hydride trans to chloride, was obtained as a mixture of two diastereomers in a 95 : 5 ratio; this was in agreement with density functional theory (DFT) calculations. In a chloroform solution, the exchange of hydride by chloride yielded [RhCl2(PPh2(CH(Ph)CH2CO))(py)2] (2) as a mixture of a kinetically preferred species, trans-py-2a, and two diastereomers, cis-Cl-2b' and cis-Cl-2b, with cis pyridines and a chloride trans to acyl; as predicted by the DFT calculations, the latter was the major species. Complex 1 reacted with racemic PPh2(CH(Ph)CH2CHO) or PPh2(o-C6H4CHO) to afford [RhHCl(PPh2(CH(Ph)CH2CO))(κ1-PPh2(CH(Ph)CH2CHO))(py)] (3) or [RhHCl(PPh2(o-C6H4CO))(κ1-PPh2(CH(Ph)CH2CHO))(py)] (4), respectively, both with a dangling alkylaldehyde. Diastereomeric mixtures with the ratios 3a/3a' = 80 : 20 and 4a/4a' = 50 : 50 were obtained. Complex 4 reacted with N-donors to afford cationic [RhH(NN)(PPh2(o-C6H4CO))(κ1-PPh2(CH(Ph)CH2CHO))]BPh4 (NN = 1,10-phenanthroline, 5; 2,2'-bipyridine, 6) or with 8-aminoquinoline (aqui) or 2-(aminomethyl)pyridine to yield imination products with terdentate ligands: [RhH(PPh2(o-C6H4CO))(κ3-PNN)]BF4 (PNN = PPh2(CH(Ph)CH2CNC9H6N), 7 and PPh2(CH(Ph)CH2CNCH2C5H4N), 8, respectively. Compounds 5-8 were obtained as equimolar a/a' mixtures of diastereomers. Moreover, 5a and 5a' could be separated. [RhCl(NBD)]2 reacted with racemic PPh2(CH(Ph)CH2CHO) and N-donors to provide nortricyclyl (Ntyl) derivatives [RhCl(NN)(Ntyl)(PPh2CH(Ph)CH2CO)] (NN = phen, 9 and bipy, 10) as an a/a' = 75 : 25 mixture of diastereomers. By reacting [RhCl(NBD)]2 with PPh2(CH(Ph)CH2CHO) and quinoline-8-carbaldehyde in methanol, the phosphino-ester complex [RhCl(Ntyl)(C9H6NCO)(κ2-PPh2CH(Ph)CH2CO(OCH3)] 11 was obtained. The initial equimolar mixture of two diastereomers readily transformed into a single diastereomer, which was found to be thermodynamically most stable by the DFT calculations. Furthermore, single crystal X-ray diffraction analysis of cis-Cl-2b, 5a, 7a, 10a and 11 is reported.
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Affiliation(s)
- Susan Azpeitia
- Facultad de Química de San Sebastián, Universidad del País Vasco (UPV/EHU), Apdo. 1072, 20080 San Sebastián, Spain.
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3
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Zumeta I, Mendicute‐Fierro C, Rodríguez‐Diéguez A, Seco JM, Garralda MA. Acyliridium(III) Complexes with PCN Terdentate Ligands Including Imino‐ or Iminium‐Acyl Moieties or Formation of Hydrido from Hydroxyl. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600056] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Itziar Zumeta
- Facultad de Química de San Sebastián, Universidad del País Vasco (UPV/EHU), Apdo. 1072, 20080 San Sebastián, Spain, http://www.ehu.es
| | - Claudio Mendicute‐Fierro
- Facultad de Química de San Sebastián, Universidad del País Vasco (UPV/EHU), Apdo. 1072, 20080 San Sebastián, Spain, http://www.ehu.es
| | | | - José M. Seco
- Facultad de Química de San Sebastián, Universidad del País Vasco (UPV/EHU), Apdo. 1072, 20080 San Sebastián, Spain, http://www.ehu.es
| | - María A. Garralda
- Facultad de Química de San Sebastián, Universidad del País Vasco (UPV/EHU), Apdo. 1072, 20080 San Sebastián, Spain, http://www.ehu.es
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4
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Half-sandwich pentamethylcyclopentadienyl group 9 metal complexes of 2-aminopyridyl ligands: Synthesis, spectral and molecular study. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0846-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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5
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San Nacianceno V, Azpeitia S, Ibarlucea L, Mendicute-Fierro C, Rodríguez-Diéguez A, Seco JM, San Sebastian E, Garralda MA. Stereoselective formation and catalytic activity of hydrido(acylphosphane)(chlorido)(pyrazole)rhodium(iii) complexes. Experimental and DFT studies. Dalton Trans 2015; 44:13141-55. [DOI: 10.1039/c5dt01705j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stereoselectivity assisted by hydrogen bond formation, inhibited by steric hindrance, predicted by DFT calculations.
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Affiliation(s)
- Virginia San Nacianceno
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- 20080 San Sebastián
- Spain
| | - Susan Azpeitia
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- 20080 San Sebastián
- Spain
| | - Lourdes Ibarlucea
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- 20080 San Sebastián
- Spain
| | - Claudio Mendicute-Fierro
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- 20080 San Sebastián
- Spain
| | | | - José M. Seco
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- 20080 San Sebastián
- Spain
| | - Eider San Sebastian
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- 20080 San Sebastián
- Spain
| | - María A. Garralda
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- 20080 San Sebastián
- Spain
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6
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Zumeta I, Mendicute-Fierro C, Rodríguez-Diéguez A, Seco JM, Garralda MA. On the Reactivity of Dihydridoirida-β-diketones with 2-Aminopyridines. Formation of Acylhydrido Complexes with New PCN Terdentate Ligands. Organometallics 2014. [DOI: 10.1021/om5011353] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Itziar Zumeta
- Facultad
de Química de San Sebastián, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
| | - Claudio Mendicute-Fierro
- Facultad
de Química de San Sebastián, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
| | | | - José M. Seco
- Facultad
de Química de San Sebastián, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
| | - María A. Garralda
- Facultad
de Química de San Sebastián, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
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7
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Pellarin KR, Puddephatt RJ. Oxidation of a Dimethylplatinum(II) Complex with Oxaziridines: A Hemiaminal Intermediate but No Oxo Complex. Organometallics 2013. [DOI: 10.1021/om400079b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Kyle R. Pellarin
- Department of Chemistry, University of Western Ontario, London, Canada N6A 5B7
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8
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Ciganda R, Garralda MA, Ibarlucea L, Mendicute-Fierro C, Torralba MC, Torres MR. Reactions of hydridoirida-β-diketones with amines or with 2-aminopyridines: formation of hydridoirida-β-ketoimines, PCN terdentate ligands, and acyl decarbonylation. Inorg Chem 2012; 51:1760-8. [PMID: 22257029 DOI: 10.1021/ic202065d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The hydridoirida-β-diketone [IrHCl{(PPh(2)(o-C(6)H(4)CO))(2)H}] (1) reacts with benzylamine (C(6)H(5)CH(2)NH(2)) to give the hydridoirida-β-ketoimine [IrHCl{(PPh(2)(o-C(6)H(4)CO))(PPh(2)(o-C(6)H(4)CNCH(2)C(6)H(5)))H}] (2), stabilized by an intramolecular hydrogen bond. 2 reacts with water to undergo hydrolysis and amine coordination giving hydridodiacylamino [IrH(PPh(2)(o-C(6)H(4)CO))(2)(C(6)H(5)CH(2)NH(2))] (3). Cyclohexylamine or dimethylamine lead to hydridodiacylamino [IrH(PPh(2)(o-C(6)H(4)CO))(2)L] (4-5). In chlorinated solvents hydridodiacylamino complexes undergo exchange of hydride by chloride to afford [IrCl(PPh(2)(o-C(6)H(4)CO))(2)L] (6-9). The reaction of 1 with hydrazine (H(2)NNH(2)) gives hydridoirida-β-ketoimine [IrHCl{(PPh(2)(o-C(6)H(4)CO))(PPh(2)(o-C(6)H(4)CNNH(2)))H}] (10), fluxional in solution with values for ΔH(‡) of 2.5 ± 0.3 kcal mol(-1) and for ΔS(‡) of -32.9 ± 3 eu. A hydrolysis/imination sequence can be responsible for fluxionality. 2-Aminopyridines (RHNC(5)H(3)R'N) react with 1 to afford cis-[IrCl(PPh(2)(o-C(6)H(4)CO))(PPh(2)(o-C(6)H(4)CHNRC(5)H(3)R'N))] (R = R' = H (11), R = CH(3), R' = H (12), R = H, R' = CH(3) (13)) containing new terdentate PCN ligands in a facial disposition and cis phosphorus atoms as kinetic products. The formation of 11-13 requires imination of the hydroxycarbene moiety of 1, coordination of the nitrogen atom of pyridine to iridium, and iridium to carbon hydrogen transfer. In refluxing methanol, complexes 11-13 isomerize to afford the thermodynamic products 14-16 with trans phosphorus atoms. Chloride abstraction from complexes [IrCl(PPh(2)(o-C(6)H(4)CO))(PPh(2)(o-C(6)H(4)CHNRC(5)H(4)N))] (R = H or CH(3)) leads to decarbonylation of the acylphosphine chelating group to afford cationic complexes [Ir(CO)(PPh(2)(o-C(6)H(4)))(PPh(2)(o-C(6)H(4)CHNRC(5)H(4)N))]A, 17 (R = H, A = ClO(4)) and 18 (R = CH(3), A = BF(4)) as a cis/trans = 4:1 mixture of isomers. Single crystal X-ray diffraction analysis was performed on 6, 9, 13, and 14.
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Affiliation(s)
- Roberto Ciganda
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
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9
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Barquín M, Garralda MA, Hernández R, Ibarlucea L, Mendicute‐Fierro C, Torralba MC, Torres MR, San Nacianceno V, Zumeta I. New Acylhydrido‐ and Diacylrhodium(III) Organocomplexes Derived from 8‐Quinolinecarbaldehyde and/or
o
‐(Diphenylphosphanyl)benzaldehyde. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Montserrat Barquín
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - María A. Garralda
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Ricardo Hernández
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Lourdes Ibarlucea
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Claudio Mendicute‐Fierro
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - M. Carmen Torralba
- Departamento de Química Inorgánica, Laboratorio de Difracción de Rayos X, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain
| | - M. Rosario Torres
- Departamento de Química Inorgánica, Laboratorio de Difracción de Rayos X, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain
| | - Virginia San Nacianceno
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Itziar Zumeta
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
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10
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Hydrido iridium(III) complexes of azoaromatic ligands. Isolation, structure and studies of their physicochemical properties. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Ciganda R, Garralda MA, Ibarlucea L, Mendicute C, Pinilla E, Torres MR. Dehydrogenation of Hydridoirida‐β‐diketones in Methanol: The Selective Formation of Mono‐ and Dinuclear Acyl Complexes. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000250] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Roberto Ciganda
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - María A. Garralda
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Lourdes Ibarlucea
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Claudio Mendicute
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain
| | - Elena Pinilla
- Departamento de Química Inorgánica, Laboratorio de Difracción de Rayos X, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain
| | - M. Rosario Torres
- Departamento de Química Inorgánica, Laboratorio de Difracción de Rayos X, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain
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Garralda MA, Hernández R, Pinilla E, Torres MR, Zarandona M. Selective formation of cis-diacyl, cis-PPh(2)R rhodium(III) complexes by the reaction of rhodium(III) cis-diacyl, trans-PPh(2)R complexes with aliphatic diamines. Dalton Trans 2009:9860-9. [PMID: 19885535 DOI: 10.1039/b913244a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The cis-diacyl, trans-PPh(2)R complex [RhCl(PPh(2)(o-C(6)H(4)CO))(2)(pyridine)] () reacts with substituted aliphatic diamines to afford selectively cationic cis-diacyl, cis-PPh(2)R, diamine derivatives [Rh(PPh(2)(o-C(6)H(4)CO))(2)(NN')](+) (NN' = 1,2-diphenylethylenediamine, 2; 1,2-propanediamine, 3; N-methylethylenediamine, 4; N,N-dimethylethylenediamine, 5; N,N'-dimethylethylenediamine, 6; N,N,N'-trimethylethylenediamine, 7) with high stereoselectivity depending on the N-donor ligand employed. Complexes 2 and 3 contain a single isomer, while 4 is a mixture of two isomers, 4a and 4b. Formation of 4a occurs first and is followed by isomerisation to 4b until the equilibrium 4a:4b = 1:4 ratio is attained. In contrast, 5 and 6 contain a single isomer. More basic amino groups prefer positions trans to an acyl group while less basic amino groups are trans to a phosphine group. The preferred intramolecular N-H...O hydrogen bond formation between an amino and an acyl coordinated ligands, trans to the phosphorus atoms, appears to be relevant to the selectivity observed. 7 is a mixture of two isomers 7a and 7b in a 7a:7b = 5.7:1 ratio. N,N,N',N'-tetramethylethylenediamine or N,N'-diphenylethylenediamine led to the elimination of the N-donor ligands and the formation of a mixture of isomers of [Rh(2)(mu-Cl)(mu-PPh(2)(o-C(6)H(4)CO))(2)(PPh(2)(o-C(6)H(4)CO))(2)](+) (), where the Rh atoms are triply bridged by two acyl groups in a head-to-tail arrangement and by a chloride. The reaction of [Rh(PPh(2)(o-C(6)H(4)CO))(2)(ndmeen)]ClO(4) (5) with acids led to the displacement of the diamine and the formation of a [8a](+):[8b](+):[8c](+) = 1:1:3 mixture. 8c, containing the weakest sigma-donor oxygen atoms trans to the strongest sigma-donor acyl groups, represents the most electronically favourable geometry for . All the complexes were fully characterized spectroscopically. Single crystal X-ray diffraction analysis was performed on 5, 6, 8a and 8b.
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Affiliation(s)
- María A Garralda
- Facultad de Química de San Sebastián, Universidad del País Vasco, Apdo. 1072, 20080, San Sebastián, Spain.
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13
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Garralda MA. Aldehyde C–H activation with late transition metal organometallic compounds. Formation and reactivity of acyl hydrido complexes. Dalton Trans 2009:3635-45. [DOI: 10.1039/b817263c] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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