1
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Gajeles G, Lee KK, Lee SH. Maleic anhydride derivatives as catalysts for N-oxidation of pyridine using hydrogen peroxide. RSC Adv 2024; 14:31657-31662. [PMID: 39376527 PMCID: PMC11456919 DOI: 10.1039/d4ra05962j] [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: 08/17/2024] [Accepted: 09/30/2024] [Indexed: 10/09/2024] Open
Abstract
Maleic anhydride derivatives were evaluated as catalysts in N-oxidation of various pyridine substrates using hydrogen peroxide (H2O2). Depending on the electronic properties of the pyridine substrates, pyridines with electron-donating groups reacted well with 2,3-dimethylmaleic anhydride (DMMA). In contrast, 1-cyclohexene-1, 2-dicarboxylic anhydride (CHMA) was most effective for electron-deficient pyridines. The different performance of these two anhydrides is attributed to the diacid-anhydride equilibrium, which is crucial for regenerating the peracid oxidant through an anhydride intermediate in the catalytic cycle. This approach using a catalytic amount of anhydride with H2O2 has the potential to replace stoichiometric amounts of percarboxylic acid as an oxidant for a broader range of organic substrates.
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Affiliation(s)
- Ghellyn Gajeles
- Department of Chemistry, Kunsan National University Gunsan 573-701 Republic of Korea
| | - Kyung-Koo Lee
- Department of Chemistry, Kunsan National University Gunsan 573-701 Republic of Korea
| | - Sang Hee Lee
- Department of Chemistry, Kunsan National University Gunsan 573-701 Republic of Korea
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2
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Tian JR, Qiao YH, Zhuang QB, Fan R, Li Z, Zhang XM, Zhang FM, Tu YQ. Organo-cation catalyzed enantioselective α-hydroxylation of pyridinone-fused lactones: asymmetric synthesis of SN-38 and irinotecan. Chem Commun (Camb) 2024; 60:9954-9957. [PMID: 39177032 DOI: 10.1039/d4cc03580a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
A catalytic asymmetric α-hydroxylation of pyridinone-fused lactones, containing the core structure of camptothecin, is described. Development of a novel spiropyrrolidine amide (SPA) derived triazolium bromide organo-cation catalyst is crucial for a highly enantioselective oxidation, which also accommodates a wide array of lactones with various substituents. The resulting tricyclic tertiary alcohol with an oxa-quaternary carbon center can be further applied in the synthesis of SN-38 and irinotecan, two anti-cancer drugs derived from camptothecin.
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Affiliation(s)
- Jin-Rui Tian
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Yu-Hao Qiao
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Qing-Bo Zhuang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
- School of Pharmaceutical Sciences, National Key Laboratory of Innovative Immunotherapy, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Rong Fan
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Zhen Li
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
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3
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Lin Q, Duan Y, Li Y, Jian R, Yang K, Jia Z, Xia Y, Zhang L, Luo S. Enantioselective S N1-type reaction via electrochemically generated chiral α-Imino carbocation intermediate. Nat Commun 2024; 15:6900. [PMID: 39134515 PMCID: PMC11319787 DOI: 10.1038/s41467-024-50945-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Accepted: 07/23/2024] [Indexed: 08/15/2024] Open
Abstract
Electrochemical reactions via carbocation intermediates remain fundamental transformations that build up molecular functionality and complexity in a sustainable manner. Enantioselective control of such processes is a great challenge in a highly ionic electrolyte solution. Here, we report an anodic generation of chiral α-imino carbocation intermediates by enamine catalysis. The chiral carbocation intermediates can be intercepted by a variety of nucleophiles such as alcohols, water and thiols with high stereoselectivity. The key SN1 step proceeds via a tertiary amine-mediated proton shuttle that facilitates facial selection in reacting with carbocation.
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Affiliation(s)
- Qifeng Lin
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Yingdong Duan
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Yao Li
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Ruijun Jian
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, China
| | - Kai Yang
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Zongbin Jia
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Yu Xia
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, China
| | - Long Zhang
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China.
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, China.
| | - Sanzhong Luo
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China.
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, China.
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4
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Cai M, Zhang L, Zhang W, Lin Q, Luo S. Enantioselective Transformations by "1 + x" Synergistic Catalysis with Chiral Primary Amines. Acc Chem Res 2024; 57:1523-1537. [PMID: 38700481 DOI: 10.1021/acs.accounts.4c00128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
ConspectusSynergistic catalysis is a powerful tool that involves two or more distinctive catalytic systems to activate reaction partners simultaneously, thereby expanding the reactivity space of individual catalysis. As an established catalytic strategy, organocatalysis has found numerous applications in enantioselective transformations under rather mild conditions. Recently, the introduction of other catalytic systems has significantly expanded the reaction space of typical organocatalysis. In this regard, aminocatalysis is a prototypical example of synergistic catalysis. The combination of aminocatalyst and transition metal could be traced back to the early days of organocatalysis and has now been well explored as an enabling catalytic strategy. Particularly, the acid-base properties of aminocatalysis can be significantly expanded to include usually electrophiles generated in situ via metal-catalyzed cycles. Later on, aminocatalyst has also been exploited in synergistically combining with photochemical and electrochemical processes to facilitate redox transformations. However, synergistically combining one type of aminocatalyst with many different catalytic systems remains a great challenge. One of the most daunting challenges is the compatibility of aminocatalysts in coexistence with other catalytic species. As nucleophilic species, aminocatalysts may also bind with metal, which leads to mutual inhibition or even quenching of the individual catalytic activity. In addition, oxidative stability of aminocatalyst is also a non-neglectable issue, which causes difficulties in exploring oxidative enamine transformations.In 2007, we developed a vicinal diamine type of chiral primary aminocatalysts. This class of primary aminocatalysts was developed and evolved as functional and mechanistic mimics to the natural aldolase and has been widely applied in a number of enamine/iminium ion-based transformations. By following a "1 + x" synergistic strategy, the chiral primary amine catalysts were found to work synergistically or cooperatively with a number of transition metal catalysts, such as Pd, Rh, Ag, Co, and Cu, or other organocatalysts, such as B(C6F5)3, ketone, selenium, and iodide. Photocatalysis and electrochemical processes can also be incorporated to work together with the chiral primary amine catalysts. The 1 + x catalytic strategy enabled us to execute unexploited transformations by fine-tuning the acid-base and redox properties of the enamine intermediates and to achieve effective reaction and stereocontrol beyond the reach individually. During these efforts, an unprecedented excited-state chemistry of enamine was uncovered to make possible an effective deracemization process. In this Account, we describe our recent efforts since 2015 in exploring synergistic chiral primary amine catalysis, and the content is categorized according to the type of synergistic partner such that in each section the developed synergistic catalysis, reaction scopes, and mechanistic features are presented and discussed.
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Affiliation(s)
- Mao Cai
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Long Zhang
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Wenzhao Zhang
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Qifeng Lin
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Sanzhong Luo
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing 100084, China
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5
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Chen X, Tian J, Wang S, Wang C, Zong L. Toward Bicalutamide Analogues with High Structural Diversity Using Catalytic Asymmetric Oxohydroxylation. J Org Chem 2024; 89:3907-3911. [PMID: 38427963 DOI: 10.1021/acs.joc.3c02735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2024]
Abstract
A catalytic enantioselective synthesis of bicalutamide derivatives with promising potentials in prostate cancer treatment has been disclosed. The key intermediates, α-hydroxy-β-keto esters, were efficiently constructed through cinchoninium-mediated asymmetric oxohydroxylation of easily accessible alkenes with potassium permanganate. Good yields and high levels of asymmetric induction are achieved. This method provides a new synthetic route to bicalutamide analogues with high structural diversity, which will beneficially support subsequent structure-activity relationship studies and boost prostate cancer drug development.
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Affiliation(s)
- Xinrui Chen
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Jinxin Tian
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Shuangshuang Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Chao Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Lili Zong
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
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6
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Lu Q, He Y, Chang J, Yu W. Synthesis of 2,2-difunctionalized 2 H-azirines via I 2-mediated annulation of enamines. Org Biomol Chem 2024; 22:2292-2299. [PMID: 38407371 DOI: 10.1039/d4ob00156g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Various 2,2-difunctionalized 2H-azirines were synthesized via I2-mediated annulation reactions of readily accessible enamines in the presence of nitrogen or non-nitrogen nucleophiles. The features of the present synthesis process also include no use of transition metals, simple operation, mild reaction conditions, a broad substrate scope, and gram-scale synthesis.
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Affiliation(s)
- Qing Lu
- College of Chemistry, Pingyuan Laboratory, State Key Laboratory of Antiviral Drugs, Zhengzhou University, Zhengzhou 450001, China.
| | - Yanmin He
- College of Chemistry, Pingyuan Laboratory, State Key Laboratory of Antiviral Drugs, Zhengzhou University, Zhengzhou 450001, China.
| | - Junbiao Chang
- College of Chemistry, Pingyuan Laboratory, State Key Laboratory of Antiviral Drugs, Zhengzhou University, Zhengzhou 450001, China.
| | - Wenquan Yu
- College of Chemistry, Pingyuan Laboratory, State Key Laboratory of Antiviral Drugs, Zhengzhou University, Zhengzhou 450001, China.
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7
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Yuan L, Du P, Yin L, Yao J, Wang J, Liu C. Metal-organic framework-based S-scheme heterojunction photocatalysts. NANOSCALE 2024. [PMID: 38393670 DOI: 10.1039/d3nr06677k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
Photocatalysis is a promising technology to resolve energy and environmental issues, where the design of high-efficiency photocatalysts is the central task. As an emerging family of photocatalysts, semiconducting metal-organic frameworks (MOFs) with remarkable features have demonstrated great potential in various photocatalytic fields. Compared to MOF-based photocatalysts with a single component, construction of S-scheme heterojunctions can render MOFs with enhanced charge separation, redox capacity and solar energy utilization, and thus improved photocatalytic performance. Herein, an overview of the recent advances in the design of MOF-based S-scheme heterojunctions for photocatalytic applications is provided. The basic principle of S-scheme heterojunctions is introduced. Then, three types of MOF-based S-scheme heterojunctions with different compositions are systematically summarized including MOF/non-MOF, MOF-on-MOF and MOF-derived heterojunctions. Afterwards, the enhanced performances of MOF-based S-scheme heterojunctions in hydrogen production, CO2 reduction, C-H functionalization, H2O2 production and wastewater treatment are highlighted. Lastly, the current challenges and future prospects regarding the design and applications of MOF-based S-scheme heterojunctions are discussed to inspire the further development of this emerging field.
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Affiliation(s)
- Ling Yuan
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, P.R. China.
| | - Peiyang Du
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, P.R. China.
| | - Luli Yin
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P.R. China.
| | - Jiamin Yao
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P.R. China.
| | - Jing Wang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P.R. China.
| | - Chao Liu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, P.R. China.
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8
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Poursaitidis ET, Gkizis PL, Triandafillidi I, Kokotos CG. Organocatalytic activation of hydrogen peroxide: towards green and sustainable oxidations. Chem Sci 2024; 15:1177-1203. [PMID: 38274062 PMCID: PMC10806817 DOI: 10.1039/d3sc05618j] [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: 10/21/2023] [Accepted: 12/15/2023] [Indexed: 01/27/2024] Open
Abstract
The advent of organocatalysis provided an additional option in every researcher's arsenal, towards the development of elegant and sustainable protocols for various organic transformations. Oxidation reactions are considered to be key in organic synthesis since oxygenated functionalities appear in many natural products. Hydrogen peroxide is categorized as a green oxidant, since its only by-product is water, offering novel opportunities for the development of green and sustainable protocols. In this review article, we intend to present recent developments in the field of the organocatalytic activation of hydrogen peroxide, providing useful insight into the applied oxidative protocols. At the same time, we will present some interesting mechanistic studies, providing information on the oxygen transfer processes.
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Affiliation(s)
- Efthymios T Poursaitidis
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis 15771 Athens Greece
| | - Petros L Gkizis
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis 15771 Athens Greece
| | - Ierasia Triandafillidi
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis 15771 Athens Greece
| | - Christoforos G Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis 15771 Athens Greece
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9
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Gambhir D, Singh S, Singh RP. Enamine/Iminium-based Dual Organocatalytic Systems for Asymmetric Catalysis and Synthesis. Chem Asian J 2023:e202300627. [PMID: 37910066 DOI: 10.1002/asia.202300627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/22/2023] [Accepted: 10/31/2023] [Indexed: 11/03/2023]
Abstract
The rational combination of two catalysts to expedite the construction of chiral complex biologically and pharmacologically relevant chiral compounds has widely gained momentum over the past decade. In particular, enamine or iminium catalysis ensuing from the activation of aldehyde or ketone by chiral amine catalysts in conjugation with other organocatalytic cycles has facilitated several asymmetric transformations to yield the enantioenriched products. Regardless of the considerable discussion on the various dual catalytic approaches, literature lacks a comprehensive review focusing on the enamine and iminium-based dual organocatalytic systems. Thus, this review article has discussed the noteworthy achievements in the field of asymmetric catalysis and synthesis catalyzed by the enamine and iminium-based dual organocatalytic systems.
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Affiliation(s)
- Diksha Gambhir
- Prof. Ravi P. Singh, Department of Chemistry, Institute of Technology Delhi, Hauz Khas, New Delhi, 110-016, India
| | - Sanjay Singh
- Prof. Ravi P. Singh, Department of Chemistry, Institute of Technology Delhi, Hauz Khas, New Delhi, 110-016, India
| | - Ravi P Singh
- Prof. Ravi P. Singh, Department of Chemistry, Institute of Technology Delhi, Hauz Khas, New Delhi, 110-016, India
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10
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Zhang K, Carmo C, Deiana L, Grape ES, Inge AK, Córdova A. Sugar-Assisted Kinetic Resolutions in Metal/Chiral Amine Co-Catalyzed α-Allylations and [4+2] Cycloadditions: Highly Enantioselective Synthesis of Sugar and Chromane Derivatives. Chemistry 2023; 29:e202301725. [PMID: 37402648 DOI: 10.1002/chem.202301725] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/04/2023] [Accepted: 07/04/2023] [Indexed: 07/06/2023]
Abstract
Functionalized triose-, furanose and chromane-derivatives were synthesized by the titled reactions. The sugar-assisted kinetic resolution/C-C bond-forming cascade processes generate a functionalized sugar derivative with a quaternary stereocenter in a highly enantioselective fashion (up to >99 % ee) by using a simple combination of metal and chiral amine co-catalysts. Notably, the interplay between the chiral sugar substrate and the chiral amino acid derivative allowed for the construction of a functionalized sugar product with high enantioselectivity (up to 99 %) also when using a combination of racemic amine catalyst (0 % ee) and metal catalyst.
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Affiliation(s)
- Kaiheng Zhang
- Department of Natural Sciences, Mid Sweden University, Holmgatan 10, 85179, Sundsvall, Sweden
| | - Chrislaura Carmo
- Department of Natural Sciences, Mid Sweden University, Holmgatan 10, 85179, Sundsvall, Sweden
| | - Luca Deiana
- Department of Natural Sciences, Mid Sweden University, Holmgatan 10, 85179, Sundsvall, Sweden
| | - Erik Svensson Grape
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, 10 691, Stockholm, Sweden
| | - A Ken Inge
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, 10 691, Stockholm, Sweden
| | - Armando Córdova
- Department of Natural Sciences, Mid Sweden University, Holmgatan 10, 85179, Sundsvall, Sweden
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11
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Steparuk EV, Meshcheryakova EA, Viktorova VV, Ulitko MV, Obydennov DL, Sosnovskikh VY. Oxidative Ring-Opening Transformation of 5-Acyl-4-pyrones as an Approach for the Tunable Synthesis of Hydroxylated Pyrones and Furans. J Org Chem 2023; 88:11590-11602. [PMID: 37504952 DOI: 10.1021/acs.joc.3c00907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
A selective and tunable approach for oxidation of 4-pyrones has been developed via ring-opening transformations leading to various hydroxylated oxaheterocycles. The first step of the strategy includes the base-catalyzed epoxidation of 5-acyl-4-pyrones in the presence of hydrogen peroxide for the effective synthesis of pyrone epoxides in high yields. The epoxides bearing the CO2Et group are reactive molecules that can undergo both pyrone and oxirane ring-opening via deformylation to produce hydroxylated 2-pyrones or 4-pyrones. The acid-promoted transformation led to 3-hydroxy-4-pyrones (24-76% yields), whereas the K2CO3-catalyzed ring-opening process of 2-carbethoxy-4-pyrone epoxides proceeded as an attack of alcohol at the C-3 position bearing the CO2Et group to give functionalized 6-acyl-5-hydroxy-2-pyrones (27-87% yields). The base-catalyzed reaction of 2-aryl-4-pyrone epoxides was followed by ring contraction and the dearoylation process to produce 3-hydroxyfuran-2-carbaldehydes in 42-80% yields. The transformation of 3-aroylchromone epoxides led to flavonols and 3-hydroxybenzofuran-2-carbaldehyde in the acidic and basic conditions, respectively. The prepared hydroxylated heterocycles demonstrated high reactivity for further transformations and low cytotoxicity and are promising fluorophores or UV filters.
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Affiliation(s)
- Elena V Steparuk
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
| | - Ekaterina A Meshcheryakova
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
| | - Viktoria V Viktorova
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
| | - Maria V Ulitko
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
| | - Dmitrii L Obydennov
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
| | - Vyacheslav Y Sosnovskikh
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation
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12
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Xia C, Yuan L, Song H, Zhang C, Li Z, Zou Y, Li J, Bao T, Yu C, Liu C. Spatial Specific Janus S-Scheme Photocatalyst with Enhanced H 2 O 2 Production Performance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2300292. [PMID: 37029700 DOI: 10.1002/smll.202300292] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/17/2023] [Indexed: 06/19/2023]
Abstract
Photocatalytic oxygen reduction reaction (ORR) for H2 O2 production in the absence of sacrificing agents is a green approach and of great significance, where the design of photocatalysts with high performance is the central task. Herein, a spatial specific S-scheme heterojunction design by introducing a novel semiconducting pair with a S-scheme mechanism in a purpose-designed Janus core-shell-structured hollow morphology is reported. In this design, TiO2 nanocrystals are grown inside the inner wall of resorcinol-formaldehyde (RF) resin hollow nanocakes with a reverse bumpy ball morphology (TiO2 @RF). The S-scheme heterojunction preserves the high redox ability of the TiO2 and RF pair, the spatial specific Janus design enhances the charge separation, promotes active site exposure, and reduces the H2 O2 decomposition to a large extent. The TiO2 @RF photocatalyst shows a high H2 O2 yield of 66.6 mM g-1 h-1 and solar-to-chemical conversion efficiency of 1.11%, superior to another Janus structure (RF@TiO2 ) with the same heterojunction but a reversed Janus spatial arrangement, and most reported photocatalysts under similar reaction conditions. The work has paved the way toward the design of next-generation photocatalysts for green synthesis of H2 O2 production.
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Affiliation(s)
- Chunhong Xia
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. China
| | - Ling Yuan
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. China
| | - Hao Song
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Chaoqi Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. China
| | - Zimeng Li
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, 350002, P. R. China
| | - Yingying Zou
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. China
| | - Jiaxin Li
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. China
| | - Tong Bao
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. China
| | - Chengzhong Yu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. China
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Chao Liu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, P. R. China
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13
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Lopat’eva ER, Krylov IB, Lapshin DA, Terent’ev AO. Redox-active molecules as organocatalysts for selective oxidative transformations - an unperceived organocatalysis field. Beilstein J Org Chem 2022; 18:1672-1695. [PMID: 36570566 PMCID: PMC9749543 DOI: 10.3762/bjoc.18.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 11/23/2022] [Indexed: 12/13/2022] Open
Abstract
Organocatalysis is widely recognized as a key synthetic methodology in organic chemistry. It allows chemists to avoid the use of precious and (or) toxic metals by taking advantage of the catalytic activity of small and synthetically available molecules. Today, the term organocatalysis is mainly associated with redox-neutral asymmetric catalysis of C-C bond-forming processes, such as aldol reactions, Michael reactions, cycloaddition reactions, etc. Organophotoredox catalysis has emerged recently as another important catalysis type which has gained much attention and has been quite well-reviewed. At the same time, there are a significant number of other processes, especially oxidative, catalyzed by redox-active organic molecules in the ground state (without light excitation). Unfortunately, many of such processes are not associated in the literature with the organocatalysis field and thus many achievements are not fully consolidated and systematized. The present article is aimed at overviewing the current state-of-art and perspectives of oxidative organocatalysis by redox-active molecules with the emphasis on challenging chemo-, regio- and stereoselective CH-functionalization processes. The catalytic systems based on N-oxyl radicals, amines, thiols, oxaziridines, ketone/peroxide, quinones, and iodine(I/III) compounds are the most developed catalyst types which are covered here.
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Affiliation(s)
- Elena R Lopat’eva
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Igor B Krylov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Dmitry A Lapshin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Alexander O Terent’ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
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14
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Sun Y, Tang W, Ni H, Wang M, Huang B, Long YQ. Convergent synthesis of tetrahydropyranyl side chain of verucopeptin, an antitumor antibiotic active against multidrug-resistant cancers. Chem Commun (Camb) 2022; 58:13447-13450. [PMID: 36350039 DOI: 10.1039/d2cc04529j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A concise synthesis of the tetrahydropyranyl side chain of verucopeptin, an antitumor antibiotic cyclodepsipeptide efficacious against MDR cancers in vivo, is achieved using 12 steps in the longest linear sequence and 21 total steps, in which Julia-Kocienski olefination for the segments coupling, asymmetric hydroxylation as well as stereoselective synthesis of stable tetrahydropyran ring from a D-isoascorbic acid derivative are key steps. This convergent synthetic strategy enables the structural modification and mechanism study of verucopeptin for its clinical applications.
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Affiliation(s)
- Yuanjun Sun
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Wenhao Tang
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Huxin Ni
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Mei Wang
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Bin Huang
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Ya-Qiu Long
- Laboratory of Medicinal Chemical Biology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
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15
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Bethi V, Tanaka F. Organocatalytic Enantioselective γ-Position-Selective Mannich Reactions of β-Ketocarbonyl Derivatives. Org Lett 2022; 24:6711-6715. [PMID: 36096488 PMCID: PMC9513800 DOI: 10.1021/acs.orglett.2c02433] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Catalytic asymmetric Mannich reactions of β-ketocarbonyl
derivatives (such as β-ketoesters and (2-oxopropyl)phosphonate),
resulting in the formation of a C–C bond at the γ-position
of the β-ketocarbonyl derivatives with high enantioselectivities,
are reported. The bond formation at the α-position of the β-ketoester
was reversible, and the γ-position-reacted product δ-amino
β-ketoester derivative was kinetically formed and was stable.
The dynamic kinetic process was key for the direct access to the γ-position-reacted
products from β-ketocarbonyls under catalytic conditions.
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Affiliation(s)
- Venkati Bethi
- Chemistry and Chemical Bioengineering Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Okinawa 904-0495, Japan
| | - Fujie Tanaka
- Chemistry and Chemical Bioengineering Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Okinawa 904-0495, Japan
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16
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Del Vecchio A, Sinibaldi A, Nori V, Giorgianni G, Di Carmine G, Pesciaioli F. Synergistic Strategies in Aminocatalysis. Chemistry 2022; 28:e202200818. [PMID: 35666172 PMCID: PMC9539941 DOI: 10.1002/chem.202200818] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Indexed: 12/20/2022]
Abstract
Synergistic catalysis offers the unique possibility of simultaneous activation of both the nucleophile and the electrophile in a reaction. A requirement for this strategy is the stability of the active species towards the reaction conditions and the two concerted catalytic cycles. Since the beginning of the century, aminocatalysis has been established as a platform for the stereoselective activation of carbonyl compounds through HOMO-raising or LUMO-lowering. The burgeoning era of aminocatalysis has been driven by a deep understanding of these activation and stereoinduction modes, thanks to the introduction of versatile and privileged chiral amines. The aim of this review is to cover recent developments in synergistic strategies involving aminocatalysis in combination with organo-, metal-, photo-, and electro-catalysis, focusing on the evolution of privileged aminocatalysts architectures.
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Affiliation(s)
- Antonio Del Vecchio
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Arianna Sinibaldi
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Valeria Nori
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Giuliana Giorgianni
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Graziano Di Carmine
- Department of Chemical, Pharmaceutical and Agricultural Sciences Università degli Studi di FerraraVia Fossato di Mortara 1744121FerraraItaly
| | - Fabio Pesciaioli
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
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17
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Ma J, Gao B, Song G, Zhang R, Wang Q, Ye Z, Chen WW, Zhao B. Asymmetric α-Allylation of Glycinate with Switched Chemoselectivity Enabled by Customized Bifunctional Pyridoxal Catalysts. Angew Chem Int Ed Engl 2022; 61:e202200850. [PMID: 35182094 DOI: 10.1002/anie.202200850] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Indexed: 12/15/2022]
Abstract
Owing to the strong nucleophilicity of the NH2 group, free-NH2 glycinates react with MBH acetates to usually deliver N-allylated products even in the absence of catalysts. Without protection of the NH2 group, chiral pyridoxal catalysts bearing an amide side chain at the C3 position of the naphthyl ring switched the chemoselectivity of the glycinates from intrinsic N-allylation to α-C allylation. The reaction formed chiral multisubstituted glutamic acid esters as SN 2'-SN 2' products in good yields with excellent stereoselectivity (up to 86 % yield, >20 : 1 dr, 97 % ee). As compared to pyridoxal catalysts bearing an amide side arm at the C2 position, the pyridoxals in this study have a bigger catalytic cavity to enable effective activation of larger electrophiles, such as MBH acetates and related intermediates. The reaction is proposed to proceed via a cooperative bifunctional catalysis pathway, which accounts for the high level of diastereo- and enantiocontrol of the pyridoxal catalysts.
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Affiliation(s)
- Jiguo Ma
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Bin Gao
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Guanshui Song
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Ruixin Zhang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Qingfang Wang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Zi Ye
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Wen-Wen Chen
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
| | - Baoguo Zhao
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai, 200234, China
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18
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Hahn PL, Lowe JM, Xu Y, Burns KL, Hilinski MK. Amine Organocatalysis of Remote, Chemoselective C(sp 3)-H Hydroxylation. ACS Catal 2022; 12:4302-4309. [PMID: 35529672 PMCID: PMC9075503 DOI: 10.1021/acscatal.2c00392] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We introduce an organocatalytic approach for oxaziridinium-mediated C-H hydroxylation that employs secondary amines as catalysts. We also demonstrate the advantages of this operationally simple catalytic strategy for achieving high yielding and highly selective remote hydroxylation of compounds bearing oxidation-sensitive functional groups such as alcohols, ethers, carbamates, and amides. By employing hexafluoroisopropanol as the solvent in the absence of water, a proposed hydrogen bonding effect leads to, among other advantages, as high as ≥99:1 chemoselectivity for remote aliphatic hydroxylation of 2° alcohols, an otherwise unsolved synthetic challenge normally complicated by substantial amounts of alcohol oxidation. Initial studies of the reaction mechanism indicate the formation of an oxaziridinium salt as the active oxidant, and a C-H oxidation step that proceeds in a stereospecific manner via concerted insertion or hydrogen atom transfer/radical rebound. Furthermore, preliminary results indicate that site selectivity can be affected by amine catalyst structure. In the long term, we anticipate that this will enable new strategies for catalyst control of selectivity based on the abundance of catalytic scaffolds that have proliferated over the last twenty years as a result of Nobel Prize-winning discoveries.
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Affiliation(s)
- Philip L. Hahn
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
| | - Jared M. Lowe
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
| | - Yubo Xu
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
| | - Kevin L. Burns
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
| | - Michael K. Hilinski
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
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19
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Xu C, Li X, Bai L. Direct Aerobic α-Hydroxylation of Arylacetates for the Synthesis of Mandelates. J Org Chem 2022; 87:4298-4304. [PMID: 35245055 DOI: 10.1021/acs.joc.1c03149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aerobic α-hydroxylation of α-methylene esters has proven challenging due to overoxidation and hydrolysis of the materials. In this article, KOtBu-promoted TBAB-catalyzed α-hydroxylation of α-methylene aryl esters using O2 as the oxygen source has been developed. Both low reaction temperature and catalyst TBAB are keys to success. This reaction provides an environmentally friendly and low-cost approach to mandelates, which are valuable building blocks and widely present in pharmaceuticals.
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Affiliation(s)
- Changming Xu
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Xiangfan Li
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Lei Bai
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
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20
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Ma J, Gao B, Song G, Zhang R, Wang Q, Ye Z, Chen WW, Zhao B. Asymmetric a‐Allylation of Glycinate with Switched Chemoselectivity Enabled by Customized Bifunctional Pyridoxal Catalysts. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jiguo Ma
- Shanghai Normal University Chemistry CHINA
| | - Bin Gao
- Shanghai Normal University Chemistry CHINA
| | | | | | | | - Zi Ye
- Shanghai Normal University Chemistry CHINA
| | - Wen-Wen Chen
- Shanghai Normal University Chemistry 100 Guilin Rd 200234 Shanghai CHINA
| | - Baoguo Zhao
- Shanghai Normal University Chemistry Department 100 Guiling Rd 200234 Shanghai CHINA
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21
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Fan T, Liu Y. Recent Advances in Synthesis of Chiral Tertiary Amines via Asymmetric Catalysis Involving Metal-Hydride Species. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202206032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Li S, Wang S, Li J, Qi Y, Wang C, Zong L, Tan CH. Monocationic Cinchoninium Catalyzed Asymmetric Oxohydroxylation of Enoates. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Shuangqing Li
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Shuangshuang Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Juan Li
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yue Qi
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Chao Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Lili Zong
- School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Choon-Hong Tan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
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23
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Iazzetti A, Mazzoccanti G, Bencivenni G, Righi P, Calcaterra A, Villani C, Ciogli A. Primary Amine Catalyzed Activation of Carbonyl Compounds: A Study on Reaction Pathways and Reactive Intermediates by Mass Spectrometry. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101272] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Antonia Iazzetti
- Department of Basic Biotechnological Sciences Intensivological and perioperative clinics Catholic University of Sacred Heart L. go F. Vito 1 00168 Rome Italy
| | - Giulia Mazzoccanti
- Department of Chemistry and Drug Technology Sapienza University of Rome Piazzale A. Moro 5 00185 Rome Italy
| | - Giorgio Bencivenni
- Department of Industrial Chemistry “Toso Montanari” University of Bologna Viale del Risorgimento 4 40136 Bologna Italy
| | - Paolo Righi
- Department of Industrial Chemistry “Toso Montanari” University of Bologna Viale del Risorgimento 4 40136 Bologna Italy
| | - Andrea Calcaterra
- Department of Chemistry and Drug Technology Sapienza University of Rome Piazzale A. Moro 5 00185 Rome Italy
| | - Claudio Villani
- Department of Chemistry and Drug Technology Sapienza University of Rome Piazzale A. Moro 5 00185 Rome Italy
| | - Alessia Ciogli
- Department of Chemistry and Drug Technology Sapienza University of Rome Piazzale A. Moro 5 00185 Rome Italy
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24
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Reshi NUD, Saptal VB, Beller M, Bera JK. Recent Progress in Transition-Metal-Catalyzed Asymmetric Reductive Amination. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04208] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Noor U Din Reshi
- Department of Chemistry and Center for Environmental Science, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Vitthal B. Saptal
- Department of Chemistry and Center for Environmental Science, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Matthias Beller
- Leibniz-Institut fr Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Jitendra K. Bera
- Department of Chemistry and Center for Environmental Science, Indian Institute of Technology Kanpur, Kanpur, 208016, India
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25
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Amine/ketone cooperative catalysis with H2O2. TRENDS IN CHEMISTRY 2021. [DOI: 10.1016/j.trechm.2021.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Triandafillidi I, Kokotou MG, Lotter D, Sparr C, Kokotos CG. Aldehyde-catalyzed epoxidation of unactivated alkenes with aqueous hydrogen peroxide. Chem Sci 2021; 12:10191-10196. [PMID: 34377408 PMCID: PMC8336450 DOI: 10.1039/d1sc02360h] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 06/18/2021] [Indexed: 12/23/2022] Open
Abstract
The organocatalytic epoxidation of unactivated alkenes using aqueous hydrogen peroxide provides various indispensable products and intermediates in a sustainable manner. While formyl functionalities typically undergo irreversible oxidations when activating an oxidant, an atropisomeric two-axis aldehyde capable of catalytic turnover was identified for high-yielding epoxidations of cyclic and acyclic alkenes. The relative configuration of the stereogenic axes of the catalyst and the resulting proximity of the aldehyde and backbone residues resulted in high catalytic efficiencies. Mechanistic studies support a non-radical alkene oxidation by an aldehyde-derived dioxirane intermediate generated from hydrogen peroxide through the Payne and Criegee intermediates.
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Affiliation(s)
- Ierasia Triandafillidi
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis 15771 Athens Greece
- Department of Chemistry, University of Basel St. Johanns-Ring 19 Basel 4056 Switzerland
| | - Maroula G Kokotou
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis 15771 Athens Greece
| | - Dominik Lotter
- Department of Chemistry, University of Basel St. Johanns-Ring 19 Basel 4056 Switzerland
| | - Christof Sparr
- Department of Chemistry, University of Basel St. Johanns-Ring 19 Basel 4056 Switzerland
| | - Christoforos G Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis 15771 Athens Greece
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