1
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Tang Y, Liu K, Wu Y, Zhou S, Cheng T, Liu G. Single‐Operation Decarboxylative Mannich Reaction/Asymmetric Transfer Hydrogenation Cascade Process Directly Accesses 1,3‐Distereocentered β‐Sulfonamido Alcohols. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yong Tang
- Shanghai Normal University - Xuhui Campus CHINA
| | - Kaihong Liu
- Shanghai Normal University - Xuhui Campus CHINA
| | - Ye Wu
- Shanghai Normal University - Xuhui Campus CHINA
| | - Siyu Zhou
- Shanghai Normal University - Xuhui Campus CHINA
| | | | - Guohua Liu
- Shanghai Normal University - Xuhui Campus CHINA
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2
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Doyon TJ, Kumar P, Thein S, Kim M, Stitgen A, Grieger AM, Madigan C, Willoughby PH, Buller AR. Scalable and Selective β-Hydroxy-α-Amino Acid Synthesis Catalyzed by Promiscuous l-Threonine Transaldolase ObiH. Chembiochem 2022; 23:e202100577. [PMID: 34699683 PMCID: PMC8796315 DOI: 10.1002/cbic.202100577] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Indexed: 01/21/2023]
Abstract
Enzymes from secondary metabolic pathways possess broad potential for the selective synthesis of complex bioactive molecules. However, the practical application of these enzymes for organic synthesis is dependent on the development of efficient, economical, operationally simple, and well-characterized systems for preparative scale reactions. We sought to bridge this knowledge gap for the selective biocatalytic synthesis of β-hydroxy-α-amino acids, which are important synthetic building blocks. To achieve this goal, we demonstrated the ability of ObiH, an l-threonine transaldolase, to achieve selective milligram-scale synthesis of a diverse array of non-standard amino acids (nsAAs) using a scalable whole cell platform. We show how the initial selectivity of the catalyst is high and how the diastereomeric ratio of products decreases at high conversion due to product re-entry into the catalytic cycle. ObiH-catalyzed reactions with a variety of aromatic, aliphatic and heterocyclic aldehydes selectively generated a panel of β-hydroxy-α-amino acids possessing broad functional-group diversity. Furthermore, we demonstrated that ObiH-generated β-hydroxy-α-amino acids could be modified through additional transformations to access important motifs, such as β-chloro-α-amino acids and substituted α-keto acids.
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Affiliation(s)
- Tyler J. Doyon
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, United States
| | - Prasanth Kumar
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, United States
| | - Sierra Thein
- Department of Chemistry, Ripon College, Ripon, WI 54971, United States
| | - Maeve Kim
- Department of Chemistry, Ripon College, Ripon, WI 54971, United States
| | - Abigail Stitgen
- Department of Chemistry, Ripon College, Ripon, WI 54971, United States
| | | | - Cormac Madigan
- Department of Chemistry, Ripon College, Ripon, WI 54971, United States
| | | | - Andrew R. Buller
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, United States
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3
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Xavier T, Condon S, Pichon C, Le Gall E, Presset M. Substituted Malonic Acid Half Oxyesters (SMAHOs): Greener Nucleophiles for Organic Synthesis. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tania Xavier
- ICMPE: Institut de Chimie et des Materiaux Paris-Est C3M FRANCE
| | - Sylvie Condon
- ICMPE: Institut de Chimie et des Materiaux Paris-Est C3M FRANCE
| | | | - Erwan Le Gall
- ICMPE: Institut de Chimie et des Materiaux Paris-Est C3M FRANCE
| | - Marc Presset
- Institut de Chimie et des Materiaux Paris-Est C3M 2-8 Rue Henri Dunant94320 94320 Thiais FRANCE
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4
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Qin W, Subhani M, Jiang C, Lu H. β-Keto acids in asymmetric metal catalysis and organocatalysis. Org Biomol Chem 2021; 19:10030-10046. [PMID: 34747960 DOI: 10.1039/d1ob01481a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
β-Keto acids, ideal surrogates of inactive ketones, play an important role in organic synthesis. The asymmetric decarboxylative reaction using β-keto acids is the one which is being studied the most. Herein we present a comprehensive review on this research topic, which is generally classified according to different catalytic systems and chiral induction modes. Additionally, some extended utilities of these methodologies for synthesizing bioactive compounds were also summarized. This review will facilitate the synthetic community to understand the role of β-keto acids in asymmetric reactions, providing many new opportunities for further exploration in this field.
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Affiliation(s)
- Wei Qin
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China.
| | - Mahboob Subhani
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China.
| | - Chunhui Jiang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China.
| | - Hongfei Lu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China.
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5
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Xavier T, Condon S, Pichon C, Le Gall E, Presset M. Preparation of mono-substituted malonic acid half oxyesters (SMAHOs). Beilstein J Org Chem 2021; 17:2085-2094. [PMID: 34476015 PMCID: PMC8381853 DOI: 10.3762/bjoc.17.135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 08/03/2021] [Indexed: 01/14/2023] Open
Abstract
The use of mono-substituted malonic acid half oxyesters (SMAHOs) has been hampered by the sporadic references describing their preparation. An evaluation of different approaches has been achieved, allowing to define the best strategies to introduce diversity on both the malonic position and the ester function. A classical alkylation step of a malonate by an alkyl halide followed by a monosaponification gave access to reagents bearing different substituents at the malonic position, including functionalized derivatives. On the other hand, the development of a monoesterification step of a substituted malonic acid derivative proved to be the best entry for diversity at the ester function, rather than the use of an intermediate Meldrum acid. Both these transformations are characterized by their simplicity and efficiency, allowing a straightforward access to SMAHOs from cheap starting materials.
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Affiliation(s)
- Tania Xavier
- Université Paris Est Créteil, CNRS, ICMPE, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Sylvie Condon
- Université Paris Est Créteil, CNRS, ICMPE, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Christophe Pichon
- Université Paris Est Créteil, CNRS, ICMPE, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Erwan Le Gall
- Université Paris Est Créteil, CNRS, ICMPE, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Marc Presset
- Université Paris Est Créteil, CNRS, ICMPE, 2 rue Henri Dunant, F-94320 Thiais, France
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6
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Peculiarities of promiscuous L-threonine transaldolases for enantioselective synthesis of β-hydroxy-α-amino acids. Appl Microbiol Biotechnol 2021; 105:3507-3520. [PMID: 33900425 PMCID: PMC8072733 DOI: 10.1007/s00253-021-11288-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/31/2021] [Accepted: 04/07/2021] [Indexed: 02/07/2023]
Abstract
The introduction of β-hydroxy-α-amino acids (βHAAs) into organic molecules has received considerable attention as these molecules have often found widespread applications in bioorganic chemistry, medicinal chemistry and biomaterial science. Despite innovation of asymmetric synthesis of βHAAs, stereoselective synthesis to control the two chiral centres at Cα and Cβ positions is still challenging, with poor atomic economy and multi protection and deprotection steps. These syntheses are often operated under harsh conditions. Therefore, a biotransformation approach using biocatalysts is needed to selectively introduce these two chiral centres into structurally diverse molecules. Yet, there are few ways that enable one-step synthesis of βHAAs. One is to extend the substrate scope of the existing enzyme inventory. Threonine aldolases have been explored to produce βHAAs. However, the enzymes have poor controlled installation at Cβ position, often resulting in a mixture of diastereoisomers which are difficult to be separated. In this respect, L-threonine transaldolases (LTTAs) offer an excellent potential as the enzymes often provide controlled stereochemistry at Cα and Cβ positions. Another is to mine LTTA homologues and engineer the enzymes using directed evolution with the aim of finding engineered biocatalysts to accept broad substrates with enhanced conversion and stereoselectivity. Here, we review the development of LTTAs that incorporate various aldehyde acceptors to generate structurally diverse βHAAs and highlight areas for future developments. KEY POINTS: • The general mechanism of the transaldolation reaction catalysed by LTTAs • Recent advances in LTTAs from different biosynthetic pathways • Applications of LTTAs as biocatalysts for production of βHAAs.
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7
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Xavier T, Condon S, Pichon C, Le Gall E, Presset M. Decarboxylative Mannich Reactions with Substituted Malonic Acid Half-Oxyesters. J Org Chem 2021; 86:5452-5462. [PMID: 33822615 DOI: 10.1021/acs.joc.0c02895] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The decarboxylative Mannich reaction between imines and substituted malonic acids half-oxyesters (SMAHOs) has been developed using 1,4-diazabicyclo[2.2.2]octane (DABCO) as an organocatalyst. The reaction proceeds under simple reaction conditions and tolerates a broad range of substrates, affording general access to β2,3-aminoesters, the syn diastereomer being the major one. An alternative multicomponent protocol has also been developed to increase the overall eco-compatibility of the process.
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Affiliation(s)
- Tania Xavier
- ICMPE, Université Paris Est Créteil, CNRS, ICMPE, UMR7182, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Sylvie Condon
- ICMPE, Université Paris Est Créteil, CNRS, ICMPE, UMR7182, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Christophe Pichon
- ICMPE, Université Paris Est Créteil, CNRS, ICMPE, UMR7182, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Erwan Le Gall
- ICMPE, Université Paris Est Créteil, CNRS, ICMPE, UMR7182, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Marc Presset
- ICMPE, Université Paris Est Créteil, CNRS, ICMPE, UMR7182, 2 rue Henri Dunant, F-94320 Thiais, France
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8
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Yu L, Somfai P. Enantioselective synthesis of anti-3-alkenyl-2-amido-3-hydroxy esters: application to the total synthesis of (+)-alexine. RSC Adv 2019; 9:2799-2802. [PMID: 35520501 PMCID: PMC9059938 DOI: 10.1039/c9ra00173e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 01/12/2019] [Indexed: 11/29/2022] Open
Abstract
A straightforward synthesis of anti-3-alkenyl-2-amido-3-hydroxy esters from the corresponding racemic α-amino-β-keto esters by using a ATH/DKR protocol has been developed. This method gives moderate to excellent yields with high chemo-, diastereo- and enantioselectivities for a broad range of substrates. In order to highlight the versatility of the methodology it was applied in an efficient asymmetric synthesis of the polyhydroxylated pyrrolizidine alkaloid (+)-alexine. A straightforward synthesis of anti-3-alkenyl-2-amido-3-hydroxy esters from the corresponding racemic α-amino-β-keto esters by using a ATH/DKR protocol has been developed.![]()
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Affiliation(s)
- Lu Yu
- Centre for Analysis and Synthesis
- Department of Chemistry
- Lund University
- Lund
- Sweden
| | - Peter Somfai
- Centre for Analysis and Synthesis
- Department of Chemistry
- Lund University
- Lund
- Sweden
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9
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Davies SG, Fletcher AM, Greenaway CJ, Kennedy MS, Mayer C, Roberts PM, Thomson JE. Trading N and O. Part 4: Asymmetric synthesis of syn-β-substituted-α-amino acids. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.071] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Chaumont P, Baudoux J, Maddaluno J, Rouden J, Harrison-Marchand A. Access to Anti or Syn 2-Amino-1,3-diol Scaffolds from a Common Decarboxylative Aldol Adduct. J Org Chem 2018; 83:8081-8091. [PMID: 29953234 DOI: 10.1021/acs.joc.8b00901] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A straightforward synthetic pathway allowing the access to anti or syn 2-amino-1,3-diol scaffolds is presented. The strategy relies on a diastereoselective organocatalyzed decarboxylative aldol reaction of a N-Boc-hemimalonate that is easily formed from commercial N-Boc-diethyl malonate. Although this method has been optimized previously with the N-Bz-hemimalonate analogue, this key step was reinvestigated with the N-Boc derivative to improve the required reaction time, the yield, and the diastereoselectivity. The new conditions enhance this transformation, and quantitative yields and anti/syn ratios up to 96:4 can be obtained. The anti aldol product was easily isolated in pure form and then taken forward as the key precursor in the preparation of both a set of ten N-/O-alkylated anti 2-amino-1,3-diol derivatives and the syn congeners.
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Affiliation(s)
- Pauline Chaumont
- Laboratoire COBRA (UMR 6014 & FR 3038) , Normandie Université, UNIROUEN, INSA Rouen, CNRS , 76000 Rouen , France
| | - Jérome Baudoux
- Laboratoire LCMT (UMR 6507 & FR 3038) , Normandie Université, ENSICAEN, UNICAEN, CNRS , 14000 Caen , France
| | - Jacques Maddaluno
- Laboratoire COBRA (UMR 6014 & FR 3038) , Normandie Université, UNIROUEN, INSA Rouen, CNRS , 76000 Rouen , France
| | - Jacques Rouden
- Laboratoire LCMT (UMR 6507 & FR 3038) , Normandie Université, ENSICAEN, UNICAEN, CNRS , 14000 Caen , France
| | - Anne Harrison-Marchand
- Laboratoire COBRA (UMR 6014 & FR 3038) , Normandie Université, UNIROUEN, INSA Rouen, CNRS , 76000 Rouen , France
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11
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Zhu YJ, Lei ZL, Huang DK, Lian B, Liu ZJ, Hu XJ, Liu JT. Decarboxylative difluoromethylation of aldehydes with PhSO 2 CF 2 COOK: A facile and efficient access to difluoromethylated carbinols. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.07.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Singjunla Y, Pigeaux M, Laporte R, Baudoux J, Rouden J. Thioamide-Substituted Cinchona Alkaloids as Efficient Organocatalysts for Asymmetric Decarboxylative Reactions of MAHOs. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700870] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yuttapong Singjunla
- LCMT, ENSICAEN, UNICAEN, CNRS; Normandie Univ.; 6 Boulevard du Maréchal Juin 14000 Caen France
| | - Morgane Pigeaux
- LCMT, ENSICAEN, UNICAEN, CNRS; Normandie Univ.; 6 Boulevard du Maréchal Juin 14000 Caen France
| | - Romain Laporte
- LCMT, ENSICAEN, UNICAEN, CNRS; Normandie Univ.; 6 Boulevard du Maréchal Juin 14000 Caen France
| | - Jérôme Baudoux
- LCMT, ENSICAEN, UNICAEN, CNRS; Normandie Univ.; 6 Boulevard du Maréchal Juin 14000 Caen France
| | - Jacques Rouden
- LCMT, ENSICAEN, UNICAEN, CNRS; Normandie Univ.; 6 Boulevard du Maréchal Juin 14000 Caen France
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13
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Huang DK, Lei ZL, Zhu YJ, Liu ZJ, Hu XJ, Mao HF. An expedient synthesis of α,α-difluoro-β-hydroxy ketones via decarboxylative aldol reaction of α,α-difluoro-β-keto acids with aldehydes. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.07.060] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Singjunla Y, Baudoux J, Rouden J. Straightforward and Stereoselective Synthesis of α,β-Diamino Acid Derivatives by Means of an Organocatalyzed Decarboxylative Mannich Reaction. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700468] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yuttapong Singjunla
- Normandie Univ.; LCMT, ENSICAEN, UNICAEN, CNRS; 6 Boulevard du Maréchal Juin 14000 Caen France
| | - Jérôme Baudoux
- Normandie Univ.; LCMT, ENSICAEN, UNICAEN, CNRS; 6 Boulevard du Maréchal Juin 14000 Caen France
| | - Jacques Rouden
- Normandie Univ.; LCMT, ENSICAEN, UNICAEN, CNRS; 6 Boulevard du Maréchal Juin 14000 Caen France
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15
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Singjunla Y, Colombano S, Baudoux J, Rouden J. Stereoselective synthesis of dehydroamino acids using malonic acid half oxyester and aromatic aldehydes. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.03.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Liu P, Zhang G, Sun P. Transition metal-free decarboxylative alkylation reactions. Org Biomol Chem 2016; 14:10763-10777. [DOI: 10.1039/c6ob02101h] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
This review summarizes recent advances in the transition metal-free decarboxylative alkylation of carboxylic acids and their derivatives.
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Affiliation(s)
- Ping Liu
- College of Chemistry and Materials Science
- Nanjing Normal University; Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control; Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Nanjing 210023
- China
| | - Guanghui Zhang
- School of Chemical Engineering
- Purdue University
- West Lafayette
- USA
| | - Peipei Sun
- College of Chemistry and Materials Science
- Nanjing Normal University; Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control; Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Nanjing 210023
- China
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17
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Zhang J, Shao Y, Wang Y, Li H, Xu D, Wan X. Transition-metal-free decarboxylation of dimethyl malonate: an efficient construction of α-amino acid esters using TBAI/TBHP. Org Biomol Chem 2015; 13:3982-7. [PMID: 25722069 DOI: 10.1039/c5ob00109a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A transition-metal-free decarboxylation coupling process for the preparation of α-amino acid esters, which succeeded in merging hydrolysis/decarboxylation/nucleophilic substitution, is well described. This strategy uses commercially available inexpensive starting materials, catalysts and oxidants and has a wide substrate scope and operational simplicity.
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Affiliation(s)
- Jie Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, 215123 Suzhou, China.
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18
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Wang H, Shao Y, Zheng H, Wang H, Cheng J, Wan X. Cyanoacetic Acid as a Masked Electrophile: Transition-Metal-Free Cyanomethylation of Amines and Carboxylic Acids. Chemistry 2015; 21:18333-7. [DOI: 10.1002/chem.201502733] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2015] [Revised: 09/24/2015] [Indexed: 01/13/2023]
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19
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Kumar KSA, Chattopadhyay S. d-Glucose based syntheses of β-hydroxy derivatives of l-glutamic acid, l-glutamine, l-proline and a dihydroxy pyrrolidine alkaloid. RSC Adv 2015. [DOI: 10.1039/c5ra01340b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The β-hydroxy derivatives of l-glutamic acid, l-glutamine and l-proline, useful for peptide/protein studies, were synthesized starting from d-glucose.
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20
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Szcześniak P, Październiok-Holewa A, Klimczak U, Stecko S. Synthesis of β- and γ-Hydroxy α-Amino Acids via Enzymatic Kinetic Resolution and Cyanate-to-Isocyanate Rearrangement. J Org Chem 2014; 79:11700-13. [DOI: 10.1021/jo502026a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Piotr Szcześniak
- Institute
of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Agnieszka Październiok-Holewa
- Department
of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Silesian University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland
| | - Urszula Klimczak
- Institute
of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Sebastian Stecko
- Institute
of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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21
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Davies SG, Fletcher AM, Frost AB, Roberts PM, Thomson JE. Trading N and O. Part 2: Exploiting aziridinium intermediates for the synthesis of β-hydroxy-α-amino acids. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.057] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Domalain V, Hubert-Roux M, Lange CM, Baudoux J, Rouden J, Afonso C. Use of transition metals to improve the diastereomers differentiation by ion mobility and mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2014; 49:423-427. [PMID: 24809904 DOI: 10.1002/jms.3349] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 02/03/2014] [Accepted: 02/14/2014] [Indexed: 06/03/2023]
Affiliation(s)
- Virginie Domalain
- COBRA, UMR 6014 et FR 3038, Université de Rouen, INSA de Rouen, CNRS, IRCOF, 1 rue Tesnière, 76821, Mont-Saint-Aignan Cedex, France
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23
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Duan Z, Han J, Qian P, Zhang Z, Wang Y, Pan Y. A convenient enantioselective decarboxylative aldol reaction to access chiral α-hydroxy esters using β-keto acids. Beilstein J Org Chem 2014; 10:969-74. [PMID: 24991246 PMCID: PMC4077541 DOI: 10.3762/bjoc.10.95] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 04/10/2014] [Indexed: 12/15/2022] Open
Abstract
We show a convenient decarboxylative aldol process using a scandium catalyst and a PYBOX ligand to generate a series of highly functionalized chiral α-hydroxy esters. The protocol tolerates a broad range of β-keto acids with inactivated aromatic and aliphatic α-keto esters. The possible mechanism is rationalized.
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Affiliation(s)
- Zhiqiang Duan
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Jianlin Han
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China ; Institute for Chemistry & Biomedical Sciences, Nanjing University, Nanjing, 210093, China
| | - Ping Qian
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Zirui Zhang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Yi Wang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China ; State of Key Laboratory of Coordination, Nanjing University, Nanjing, 210093, China
| | - Yi Pan
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China ; State of Key Laboratory of Coordination, Nanjing University, Nanjing, 210093, China
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Gopalakrishna Panicker RK, Krishnapillai S. Synthesis of on resin poly(propylene imine) dendrimer and its use as organocatalyst. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.084] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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