1
|
Gordon CP, Tadros J, Dankers C, Jurisinec A, Menti M, Aldrich-Wright J. A Comparison of Immobilised Triphenylphosphine and 1-Hydroxybenzotriazole as Mediators of Catch-and-Release Acylation Under Flow Conditions. Chem Asian J 2022; 17:e202101308. [PMID: 35048529 DOI: 10.1002/asia.202101308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 01/12/2022] [Indexed: 11/09/2022]
Abstract
Described herein is a comparative study of immobilised triphenylphosphine (PS-PPh3) and 1-hydroxybenzotriazole (PS-HOBt) to mediate amide couplings under continuous flow. Compared to Appel-type amidations (PS-PPh3), the developed 'catch-and-release' approach (PS-HOBt) afforded near-quantitative amide conversions. Utilising this strategy, sulfonyl chloride amenability enabled facile access to an expanded library of sulfonate and sulfonamides. Post-constructional peptide modification was also demonstrated, affording two Nβ-functionalised pentapeptides in high yields and purities. In contrast to frequently utilised coupling agents, the PS-HOBt resin could be recycled six times without a reduction in efficacy or regeneration requirements.
Collapse
Affiliation(s)
- Christopher Peter Gordon
- Western Sydney University, School of Science and Health, Goldsmith Ave, Campbelltown, NSW 2560, Australia, 2560, Campbelltown, AUSTRALIA
| | - Joseph Tadros
- Western Sydney University, School of Science and Health, AUSTRALIA
| | | | - Ashley Jurisinec
- Western Sydney University, School of Science and Health, AUSTRALIA
| | - Maria Menti
- Western Sydney University, School of Science and Health, AUSTRALIA
| | | |
Collapse
|
2
|
Hong WP, Tran VH, Kim HK. Practical one-pot amidation of N-Alloc-, N-Boc-, and N-Cbz protected amines under mild conditions. RSC Adv 2021; 11:15890-15895. [PMID: 35481162 PMCID: PMC9030462 DOI: 10.1039/d1ra02242c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 04/19/2021] [Indexed: 12/26/2022] Open
Abstract
A facile one-pot synthesis of amides from N-Alloc-, N-Boc-, and N-Cbz-protected amines has been described. The reactions involve the use of isocyanate intermediates, which are generated in situ in the presence of 2-chloropyridine and trifluoromethanesulfonyl anhydride, to react with Grignard reagents to produce the corresponding amides. Using this reaction protocol, a variety of N-Alloc-, N-Boc-, and N-Cbz-protected aliphatic amines and aryl amines were efficiently converted to amides with high yields. This method is highly effective for the synthesis of amides and offers a promising approach for facile amidation. One-pot efficient transformation of N-Alloc-, N-Boc-, and N-Cbz protected amines to amides was achieved by using 2-chloropyridine and trifluoromethanesulfonyl anhydride as well as Grignard reagent and MgCl2.![]()
Collapse
Affiliation(s)
- Wan Pyo Hong
- School of Advanced Materials and Chemical Engineering, Daegu Catholic University 13-13, Hayang-ro, Hayang-eup Gyeongsan-si Gyeongbuk 38430 Republic of Korea
| | - Van Hieu Tran
- Department of Nuclear Medicine, Molecular Imaging & Therapeutic Medicine Research Center, Jeonbuk National University Medical School and Hospital Jeonju 54907 Republic of Korea .,Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital Jeonju 54907 Republic of Korea
| | - Hee-Kwon Kim
- Department of Nuclear Medicine, Molecular Imaging & Therapeutic Medicine Research Center, Jeonbuk National University Medical School and Hospital Jeonju 54907 Republic of Korea .,Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital Jeonju 54907 Republic of Korea
| |
Collapse
|
3
|
George N, Ofori S, Parkin S, Awuah SG. Mild deprotection of the N- tert-butyloxycarbonyl ( N-Boc) group using oxalyl chloride. RSC Adv 2020; 10:24017-24026. [PMID: 33456769 PMCID: PMC7810210 DOI: 10.1039/d0ra04110f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
We report a mild method for the selective deprotection of the N-Boc group from a structurally diverse set of compounds, encompassing aliphatic, aromatic, and heterocyclic substrates by using oxalyl chloride in methanol. The reactions take place under room temperature conditions for 1–4 h with yields up to 90%. This mild procedure was applied to a hybrid, medicinally active compound FC1, which is a novel dual inhibitor of IDO1 and DNA Pol gamma. A broader mechanism involving the electrophilic character of oxalyl chloride is postulated for this deprotection strategy. We report a mild method for the selective deprotection of the N-Boc group from a structurally diverse set of compounds, encompassing aliphatic, aromatic, and heterocyclic substrates by using oxalyl chloride in methanol.![]()
Collapse
Affiliation(s)
- Nathaniel George
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Samuel Ofori
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Sean Parkin
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Samuel G Awuah
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
| |
Collapse
|
4
|
Hickey SM, Nitschke SO, Sweetman MJ, Sumby CJ, Brooks DA, Plush SE, Ashton TD. Cross-Coupling of Amide and Amide Derivatives to Umbelliferone Nonaflates: Synthesis of Coumarin Derivatives and Fluorescent Materials. J Org Chem 2020; 85:7986-7999. [DOI: 10.1021/acs.joc.0c00813] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Shane M. Hickey
- Clinical Health Sciences, Cancer Research Institute, University of South Australia, Adelaide, SA 5000, Australia
| | - Samuel O. Nitschke
- Clinical Health Sciences, Cancer Research Institute, University of South Australia, Adelaide, SA 5000, Australia
| | - Martin J. Sweetman
- Clinical Health Sciences, Cancer Research Institute, University of South Australia, Adelaide, SA 5000, Australia
| | - Christopher J. Sumby
- Department of Chemistry, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Douglas A. Brooks
- Clinical Health Sciences, Cancer Research Institute, University of South Australia, Adelaide, SA 5000, Australia
| | - Sally E. Plush
- Clinical Health Sciences, Cancer Research Institute, University of South Australia, Adelaide, SA 5000, Australia
| | - Trent D. Ashton
- The Walter and Eliza Hall Institute of Medical Research, Parkville 3052, Australia
- Department of Medical Biology, The University of Melbourne, Parkville 3010, Australia
| |
Collapse
|
5
|
Biswas S, Bheemireddy NR, Bal M, Van Steijvoort BF, Maes BUW. Directed C–H Functionalization Reactions with a Picolinamide Directing Group: Ni-Catalyzed Cleavage and Byproduct Recycling. J Org Chem 2019; 84:13112-13123. [DOI: 10.1021/acs.joc.9b02299] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Sovan Biswas
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | | | - Mathias Bal
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - Ben F. Van Steijvoort
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - Bert U. W. Maes
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| |
Collapse
|
6
|
Derasp JS, Beauchemin AM. Rhodium-Catalyzed Synthesis of Amides from Functionalized Blocked Isocyanates. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02641] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Joshua S. Derasp
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - André M. Beauchemin
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| |
Collapse
|
7
|
Activation, Deactivation and Reversibility Phenomena in Homogeneous Catalysis: A Showcase based on the Chemistry of Rhodium/Phosphine Catalysts. Catalysts 2019. [DOI: 10.3390/catal9070582] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In the present work, the rich chemistry of rhodium/phosphine complexes, which are applied as homogeneous catalysts to promote a wide range of chemical transformations, has been used to showcase how the in situ generation of precatalysts, the conversion of precatalysts into the actually active species, as well as the reaction of the catalyst itself with other components in the reaction medium (substrates, solvents, additives) can lead to a number of deactivation phenomena and thus impact the efficiency of a catalytic process. Such phenomena may go unnoticed or may be overlooked, thus preventing the full understanding of the catalytic process which is a prerequisite for its optimization. Based on recent findings both from others and the authors’ laboratory concerning the chemistry of rhodium/diphosphine complexes, some guidelines are provided for the optimal generation of the catalytic active species from a suitable rhodium precursor and the diphosphine of interest; for the choice of the best solvent to prevent aggregation of coordinatively unsaturated metal fragments and sequestration of the active metal through too strong metal–solvent interactions; for preventing catalyst poisoning due to irreversible reaction with the product of the catalytic process or impurities present in the substrate.
Collapse
|
8
|
Karthik S, Muthuvel K, Gandhi T. Base-Promoted Amidation and Esterification of Imidazolium Salts via Acyl C–C bond Cleavage: Access to Aromatic Amides and Esters. J Org Chem 2018; 84:738-751. [DOI: 10.1021/acs.joc.8b02567] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Shanmugam Karthik
- Department of Chemistry, School of Advanced Sciences, VIT, Vellore, Tamil Nadu 632014, India
| | - Karthick Muthuvel
- Department of Chemistry, School of Advanced Sciences, VIT, Vellore, Tamil Nadu 632014, India
| | - Thirumanavelan Gandhi
- Department of Chemistry, School of Advanced Sciences, VIT, Vellore, Tamil Nadu 632014, India
| |
Collapse
|
9
|
An open-source approach to automation in organic synthesis: The flow chemical formation of benzamides using an inline liquid-liquid extraction system and a homemade 3-axis autosampling/product-collection device. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.02.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
10
|
Abstract
The present review offers an overview of nonclassical (e.g., with no pre- or in situ activation of a carboxylic acid partner) approaches for the construction of amide bonds. The review aims to comprehensively discuss relevant work, which was mainly done in the field in the last 20 years. Organization of the data follows a subdivision according to substrate classes: catalytic direct formation of amides from carboxylic and amines ( section 2 ); the use of carboxylic acid surrogates ( section 3 ); and the use of amine surrogates ( section 4 ). The ligation strategies (NCL, Staudinger, KAHA, KATs, etc.) that could involve both carboxylic acid and amine surrogates are treated separately in section 5 .
Collapse
Affiliation(s)
- Renata Marcia de Figueiredo
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Jean-Simon Suppo
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Jean-Marc Campagne
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| |
Collapse
|