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R. Yaya A, Girard M, Belkhadem K, Piard R, Decken A, Choinière C, Cloutier PL, Lesage J, Breau L. Synthesis of 3-Alkyl Oxazolidines, Derived from 2-Hydroxymethyl Piperidine, as Analytical Standards for the Analysis of Volatile Aldehydes in the Workplace. ACS OMEGA 2023; 8:26793-26805. [PMID: 37546669 PMCID: PMC10398864 DOI: 10.1021/acsomega.3c00961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 05/30/2023] [Indexed: 08/08/2023]
Abstract
Hexahydro-3-alkyl-3H-oxazolo[3,4-a]pyridines 4-15 for the quantitative analysis of various aldehydes were obtained in good yield via the condensation reaction of 2-hydroxymethylpiperidine (2-HMP) with aldehydes under mild conditions. When acrolein was used, the bicyclic 17 was obtained. This novel compound has suitable physical characteristics for an analytical standard. The hexahydro-3-vinyl-3H-oxazolo[3,4-a]pyridine 16 can be obtained at higher temperatures using an excess of acrolein (3 equiv). Following the same procedure as for 16, but with an excess of 2-HMP (2 equiv), a diastereomeric mixture of 18/19, which are both bisadducts of 2-HMP with acrolein, was obtained. The latter mixture can be easily converted into pure 18. Mechanistically, a thorough 1H-NMR study did not show any evidence that the condensation reaction proceeded via an enamine. The reaction probably proceeded through an elusive hemiaminal and fleeting iminium ion, which underwent subsequent cyclization to give hexahydro-3-alkyl-3H-oxazolo[3,4-a]pyridines 4-16. The reaction pathways for the preparation of 4-18 are described.
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Affiliation(s)
- Amadou R. Yaya
- Département
de chimie, Université du Québec
à Montréal, CP. 8888, Succ. Centre-Ville, Montreal, PQ H3C 3P8, Canada
| | - Martin Girard
- Département
de chimie, Université du Québec
à Montréal, CP. 8888, Succ. Centre-Ville, Montreal, PQ H3C 3P8, Canada
| | - Karima Belkhadem
- Département
de chimie, Université du Québec
à Montréal, CP. 8888, Succ. Centre-Ville, Montreal, PQ H3C 3P8, Canada
- Department
of Chemistry University of Sciences and
Technology Mohamed Boudiaf, P.O. Box
1505 El-M’naouer, 31000 Oran, Algeria
| | - Rémi Piard
- Département
de chimie, Université du Québec
à Montréal, CP. 8888, Succ. Centre-Ville, Montreal, PQ H3C 3P8, Canada
| | - Andreas Decken
- Department
of Chemistry University of New Brunswick P.O. Box 45222 Fredericton, NB E3A 6E2, Canada
| | - Catherine Choinière
- Institut
de recherche Robert-Sauvé en santé et en sécurité
du travail, 505 Ouest De Blvd Maisonneuve, Montréal, Québec H3A 3C2, Canada
| | - Pierre Luc Cloutier
- Institut
de recherche Robert-Sauvé en santé et en sécurité
du travail, 505 Ouest De Blvd Maisonneuve, Montréal, Québec H3A 3C2, Canada
| | - Jacques Lesage
- Département
de chimie, Université du Québec
à Montréal, CP. 8888, Succ. Centre-Ville, Montreal, PQ H3C 3P8, Canada
| | - Livain Breau
- Département
de chimie, Université du Québec
à Montréal, CP. 8888, Succ. Centre-Ville, Montreal, PQ H3C 3P8, Canada
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Tuncel ST, Demir I, Erdem SS, Dogan I. Stable hemiaminals from axially chiral pyridine compounds. Chirality 2023; 35:365-375. [PMID: 36762682 DOI: 10.1002/chir.23545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 01/19/2023] [Accepted: 01/29/2023] [Indexed: 02/11/2023]
Abstract
In this study, we have synthesized a series of 3-(pyridin-2-yl)-2-(pyridin-2-ylimino)thiazolidin-4-ol derivatives regioselectively from 2-iminothiazolidin-4-ones using LiAlH4 at room temperature. Due to the presence of the restricted rotation around the N3-Caryl single bond, the formation of M/P isomers was observed. The OH group of the hemiaminal was found to orient itself on the same side with pyridyl nitrogen during this restricted rotation to form an intramolecular hydrogen bond, which was demonstrated by the computational DFT study. This orientation presumably inhibited the occurrence of dehydration and stabilized the molecule.
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Affiliation(s)
| | - Ilke Demir
- Department of Chemistry, Marmara University, Istanbul, Turkey
| | | | - Ilknur Dogan
- Department of Chemistry, Bogazici University, Istanbul, Turkey
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3
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Uhlig T, Fengler C, Seifert A, Taubert F, Kaßner L, Hähnle HJ, Hamers C, Wilhelm M, Spange S, Sommer M. Reversible and Stable Hemiaminal Hydrogels from Polyvinylamine and Highly Reactive and Selective Bis( N-acylpiperidone)s. ACS Macro Lett 2021; 10:389-394. [PMID: 35549062 DOI: 10.1021/acsmacrolett.0c00904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Water-soluble bis(N-acylpiperidone)s with aldehyde-like reactivity are reported to react rapidly with polyvinylamine at room temperature, providing unprecedented clean reaction products. Unlike most amine/ketone reactions that result in arbitrary mixtures of imines, aminals, hemiaminals, or hydrates, in the present study hemiaminals, aminals, or hemiaminal/aminal mixtures are exclusively found. Detailed NMR spectroscopy of solutions, gels, and solids, aided by model reactions, reveals that the hemiaminal/aminal ratio depends on pH, water content, and cross-linking density. Network formation is fully reversible upon changes in pH, with the resulting moduli from rheology spanning almost 3 orders of magnitude. The self-healing ability of the system is probed by rheology as well, demonstrating maintained material properties of fractured and healed samples. The unusually clean, fast, and reversible chemistry highlights bispiperidones as a class of efficient building blocks with unprecedented possibilities in dynamic covalent chemistry.
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Affiliation(s)
- Tina Uhlig
- Institute for Chemistry, Polymer Chemistry, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Christian Fengler
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology, Engesserstraße 18, 76128 Karlsruhe, Germany
| | - Andreas Seifert
- Institute for Chemistry, Polymer Chemistry, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Florian Taubert
- Institute for Chemistry, Polymer Chemistry, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Lysann Kaßner
- Institute for Chemistry, Polymer Chemistry, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | | | - Christoph Hamers
- BASF SE Ludwigshafen, Bosch-Straße 38, 67056 Ludwigshafen, Germany
| | - Manfred Wilhelm
- Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology, Engesserstraße 18, 76128 Karlsruhe, Germany
| | - Stefan Spange
- Institute for Chemistry, Polymer Chemistry, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Michael Sommer
- Institute for Chemistry, Polymer Chemistry, Chemnitz University of Technology, Straße der Nationen 62, 09111 Chemnitz, Germany
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5
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Sharma V, Mehmood A, Janesko BG, Simanek EE. TEMPORARY REMOVAL: A hydrogen bond and strong electron withdrawing group lead to the formation of surprisingly stable, cyclic hemiaminals. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Trommler K, Walther T, Seifert S, Seifert A, Hähnle H, Anders S, Kroll L, Spange S. The Reaction of Poly(Vinyl Amine) with Acetone in Water. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201800444] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Katja Trommler
- Department of Polymer ChemistryChemnitz University of Technology Straße der Nationen 62 09111 Chemnitz Germany
| | - Tina Walther
- Department of Polymer ChemistryChemnitz University of Technology Straße der Nationen 62 09111 Chemnitz Germany
| | - Susan Seifert
- Department of Polymer ChemistryChemnitz University of Technology Straße der Nationen 62 09111 Chemnitz Germany
| | - Andreas Seifert
- Department of Polymer ChemistryChemnitz University of Technology Straße der Nationen 62 09111 Chemnitz Germany
| | | | - Susann Anders
- Department of Lightweight Structures and Polymer TechnologyChemnitz University of Technology Reichenhainer Str. 31/33 09126 Chemnitz Germany
| | - Lothar Kroll
- Department of Lightweight Structures and Polymer TechnologyChemnitz University of Technology Reichenhainer Str. 31/33 09126 Chemnitz Germany
| | - Stefan Spange
- Department of Polymer ChemistryChemnitz University of Technology Straße der Nationen 62 09111 Chemnitz Germany
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Li AM, Rentschler E. 1,2,4-Triazole Schiff base directed synthesis of polynuclear iron complexes: Investigating the magnetic properties going from a dimer to a 1D chain to a 3D framework. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.08.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Fe
II
Complexes with Triple
N
1,
N
2‐Triazole Bridge Schiff Base Ligand: Antiferromagnetic Dimer vs. Spin Conversion Trimer. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800784] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Bouhidel Z, Cherouana A, Durand P, Doudouh A, Morini F, Guillot B, Dahaoui S. Synthesis, spectroscopic characterization, crystal structure, Hirshfeld surface analysis and antimicrobial activities of two triazole Schiff bases and their silver complexes. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.05.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Abrupt Spin Crossover Behavior in a Linear N1,N2-Triazole Bridged Trinuclear Fe(II) Complex. MAGNETOCHEMISTRY 2018. [DOI: 10.3390/magnetochemistry4030034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The synthesis, structures and magnetic properties of a new trinuclear spin crossover complex [FeII3(pyrtrz)6(TsO)6]·10H2O·2CH3OH (C2) and its analogue binuclear [FeII2(pyrtrz)5(SCN)4]·7H2O (C1), are reported here. These two compounds are synthesized based on the pyrrolyl functionalized Schiff base 1,2,4-triazole ligand 4-((1H-pyrrol-2-yl)methylene-amino)-4H-1,2,4-triazole (pyrtrz), which represent rare discrete multi-nuclear species, with µ2-N1,N2-triazole bridges linking the FeII centers. DC magnetic susceptibility measurements revealed an abrupt single-step spin crossover (SCO) behavior for compound 2 on the central FeII site and single-crystal X-ray diffraction (173 K) showed that this compound crystallizes in the monoclinic space group (P21/c), and multiple intramolecular interactions were found responsible for the abrupt transition. Compound 1 is a binuclear complex with thiocyanate as terminal ligands. This compound stays in high spin state over the whole temperature range and displays weak antiferromagnetic exchange coupling.
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Islam M, Razzak M, Karim M, Mirza AH. H-bond plays key role in the synthesis of stable hemiaminals. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.01.086] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Wajda-Hermanowicz K, Pieniążczak D, Wróbel R, Zatajska A, Ciunik Z, Berski S. A study on the condensation reaction of aryl substituted 4-amine-1,2,4-triazole with benzaldehydes: Structures and spectroscopic properties of schiff bases and stable hemiaminals. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.02.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Wajda-Hermanowicz K, Pieniążczak D, Zatajska A, Wróbel R, Drabent K, Ciunik Z. A Study on the Condensation Reaction of 4-Amino-3,5-dimethyl-1,2,4-triazole with Benzaldehydes: Structure and Spectroscopic Properties of Some New Stable Hemiaminals. Molecules 2015; 20:17109-31. [PMID: 26393552 PMCID: PMC6332017 DOI: 10.3390/molecules200917109] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 09/07/2015] [Accepted: 09/09/2015] [Indexed: 11/26/2022] Open
Abstract
Studies on the stable hemiaminals and Schiff bases formation in the reaction of substituted benzaldehydes with primary 3,5-dimethyl-1,2,4-triazole 4-amine were carried out under neutral conditions. These products were investigated by IR, Raman, MS, 1H- and 13C-NMR spectra as well as by X-ray crystallography. The effect of reaction conditions: temperature, polarity of the solvents utilized, substrate concentration and the ortho and para benzaldehyde substituents on the yield of products was also examined.
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Affiliation(s)
| | - Damian Pieniążczak
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, Wrocław 50-383, Poland.
| | - Aleksandra Zatajska
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, Wrocław 50-383, Poland.
| | - Robert Wróbel
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, Wrocław 50-383, Poland.
| | - Krzysztof Drabent
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, Wrocław 50-383, Poland.
| | - Zbigniew Ciunik
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, Wrocław 50-383, Poland.
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14
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Stable Hemiaminals: 2-Aminopyrimidine Derivatives. Molecules 2015; 20:14365-76. [PMID: 26258772 PMCID: PMC6332198 DOI: 10.3390/molecules200814365] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 07/20/2015] [Accepted: 07/21/2015] [Indexed: 11/17/2022] Open
Abstract
Stable hemiaminals can be obtained in the one-pot reaction between 2-aminopyrimidine and nitrobenzaldehyde derivatives. Ten new hemiaminals have been obtained, six of them in crystal state. The molecular stability of these intermediates results from the presence of both electron-withdrawing nitro groups as substituents on the phenyl ring and pyrimidine ring, so no further stabilisation by intramolecular interaction is required. Hemiaminal molecules possess a tetrahedral carbon atom constituting a stereogenic centre. As the result of crystallisation in centrosymmetric space groups both enantiomers are present in the crystal structure.
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