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Franzese S, Saker Neto N, Wong WWH. Extended Reichardt's Dye-Synthesis and Solvatochromic Properties. Chemistry 2024:e202400314. [PMID: 38589289 DOI: 10.1002/chem.202400314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/20/2024] [Accepted: 04/08/2024] [Indexed: 04/10/2024]
Abstract
Three new pyridinium-phenolate dyes based on the benchmark solvatochromic dye Betaine 30 were synthesised. The dyes contained phenylene spacers between the donor and acceptor groups. Their UV-Vis absorption spectra were measured, with the dyes showing strong negative solvatochromic behaviour comparable to that of Betaine 30. These results stood in contrast to the behaviour of the π-extended dye Betaine 21, originally reported in 1963. This dye was synthesised and found to be significantly more solvatochromic than previously reported but prone to degrade. All π-extended dyes synthesised were found to be unstable in certain solvents. Although the increased distance between donor and acceptor did not enhance solvatochromism to the extent predicted, it was still determined that the reduced planarity caused by a phenylene spacer is not as detrimental as believed.
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Affiliation(s)
- Stephen Franzese
- ARC Centre of Excellence in Exciton Science, School of Chemistry, Bio21 Institute, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Nicolau Saker Neto
- ARC Centre of Excellence in Exciton Science, School of Chemistry, Bio21 Institute, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Wallace W H Wong
- ARC Centre of Excellence in Exciton Science, School of Chemistry, Bio21 Institute, University of Melbourne, Parkville, Victoria, 3010, Australia
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Simon PM, Castillo JO, Owyong TC, White JM, Saker Neto N, Wong WWH. Protection of Boronic Acids Using a Tridentate Aminophenol ONO Ligand for Selective Suzuki-Miyaura Coupling. J Org Chem 2023; 88:1590-1599. [PMID: 36695169 DOI: 10.1021/acs.joc.2c02651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Boronic acid protecting group chemistry powerfully enhances the versatility of Suzuki-Miyaura cross-coupling. Prominent examples include trifluoroborate salts, N-methyliminodiacetic acid (MIDA) boronates, and 1,8-diaminonaphthalene boronamides. In this work, we present a bis(2-hydroxybenzyl)methylamine (BOMA) ligand that forms tridentate complexes with boronic acids much like the MIDA ligand but the deprotection is facilitated by organic acids. The BOMA boronates showed considerable stability in both aqueous base and acid, and a variety of chemoselective reactions were performed on these boronates, including selective Suzuki-Miyaura coupling, palladium-catalyzed borylation, ester hydrolysis, alkylation, lithiation-borylation, and oxidative hydroxydeboronation.
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Affiliation(s)
- Paulo Miguel Simon
- ARC Centre of Excellence in Exciton Science, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia.,School of Chemistry, Bio21 Institute, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
| | - Jonathan O Castillo
- ARC Centre of Excellence in Exciton Science, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia.,School of Chemistry, Bio21 Institute, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
| | - Tze Cin Owyong
- ARC Centre of Excellence in Exciton Science, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia.,School of Chemistry, Bio21 Institute, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
| | - Jonathan M White
- School of Chemistry, Bio21 Institute, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
| | - Nicolau Saker Neto
- ARC Centre of Excellence in Exciton Science, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia.,School of Chemistry, Bio21 Institute, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
| | - Wallace W H Wong
- ARC Centre of Excellence in Exciton Science, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia.,School of Chemistry, Bio21 Institute, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
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Ahluwalia G, Subbiah J, Mitchell VD, Saker Neto N, Jones DJ. One-Pot Synthesis of Fully Conjugated Amphiphilic Block Copolymers Using Asymmetrically Functionalized Push–Pull Monomers. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gagandeep Ahluwalia
- School of Chemistry, University of Melbourne, Bio21 Institute, 30 Flemington Road, Parkville, Victoria 3010, Australia
| | - Jegadesan Subbiah
- School of Chemistry, University of Melbourne, Bio21 Institute, 30 Flemington Road, Parkville, Victoria 3010, Australia
| | - Valerie D. Mitchell
- School of Chemistry, University of Melbourne, Bio21 Institute, 30 Flemington Road, Parkville, Victoria 3010, Australia
| | - Nicolau Saker Neto
- School of Chemistry, University of Melbourne, Bio21 Institute, 30 Flemington Road, Parkville, Victoria 3010, Australia
| | - David J. Jones
- School of Chemistry, University of Melbourne, Bio21 Institute, 30 Flemington Road, Parkville, Victoria 3010, Australia
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Saker Neto N, Jones DJ, Wong WWH. Theoretical Aspects of Iterative Coupling for Linear Oligomers and Polymers. MACROMOL THEOR SIMUL 2020. [DOI: 10.1002/mats.201900048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nicolau Saker Neto
- Australian Centre for Advanced PhotovoltaicsSchool of ChemistryBio21 InstituteThe University of Melbourne Parkville Victoria 3010 Australia
| | - David John Jones
- Australian Centre for Advanced PhotovoltaicsSchool of ChemistryBio21 InstituteThe University of Melbourne Parkville Victoria 3010 Australia
| | - Wallace Wing Ho Wong
- Australian Centre for Advanced PhotovoltaicsSchool of ChemistryBio21 InstituteThe University of Melbourne Parkville Victoria 3010 Australia
- ARC Centre of Excellence in Exciton ScienceSchool of ChemistryThe University of Melbourne Parkville Victoria 3010 Australia
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