51
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Yoshida Y, Kasuya R, Mino T, Sakamoto M. Phase-transfer catalysed asymmetric synthesis of α-chiral tetrasubstituted α-aminothioesters. Org Biomol Chem 2021; 19:6402-6406. [PMID: 34100506 DOI: 10.1039/d1ob00829c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral amino thioesters are important scaffolds owing to their widespread use in organic synthesis and biosynthesis. Despite their usefulness, their asymmetric synthesis, especially the catalytic asymmetric synthesis of α-chiral tetrasubstituted α-aminothioesters, is limited, with only one example reported so far. Herein, we report the first phase-transfer catalysed asymmetric synthesis of α-chiral tetrasubstituted α-aminothioesters to afford the corresponding products in up to 81% ee.
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Affiliation(s)
- Yasushi Yoshida
- Molecular Chirality Research Center, Graduate School of Engineering, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan.
| | - Reina Kasuya
- Molecular Chirality Research Center, Graduate School of Engineering, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan.
| | - Takashi Mino
- Molecular Chirality Research Center, Graduate School of Engineering, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan.
| | - Masami Sakamoto
- Molecular Chirality Research Center, Graduate School of Engineering, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan.
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52
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Abstract
Laccases are multicopper oxidases, which have been widely investigated in recent decades thanks to their ability to oxidize organic substrates to the corresponding radicals while producing water at the expense of molecular oxygen. Besides their successful (bio)technological applications, for example, in textile, petrochemical, and detoxifications/bioremediations industrial processes, their synthetic potentialities for the mild and green preparation or selective modification of fine chemicals are of outstanding value in biocatalyzed organic synthesis. Accordingly, this review is focused on reporting and rationalizing some of the most recent and interesting synthetic exploitations of laccases. Applications of the so-called laccase-mediator system (LMS) for alcohol oxidation are discussed with a focus on carbohydrate chemistry and natural products modification as well as on bio- and chemo-integrated processes. The laccase-catalyzed Csp2-H bonds activation via monoelectronic oxidation is also discussed by reporting examples of enzymatic C-C and C-O radical homo- and hetero-couplings, as well as of aromatic nucleophilic substitutions of hydroquinones or quinoids. Finally, the laccase-initiated domino/cascade synthesis of valuable aromatic (hetero)cycles, elegant strategies widely documented in the literature across more than three decades, is also presented.
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53
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Yao C, Wu P, Huang Y, Chen Y, Li L, Li YM. Binaphthyl-based chiral ligands: design, synthesis and evaluation of their performance in enantioselective addition of diethylzinc to aromatic aldehydes. Org Biomol Chem 2020; 18:9712-9725. [PMID: 33237100 DOI: 10.1039/d0ob02127j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The design strategy and the performance of binaphthyl-based chiral ligands were evaluated with computation and enantioselective addition of diethylzinc to aromatic aldehydes. Under optimized conditions, enantioselective addition of diethylzinc to aromatic aldehydes provided the desired optically active secondary alcohols in high isolated yields (up to 91%) and excellent enantiomeric excesses (up to 98% ee).
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Affiliation(s)
- Chao Yao
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, People's Republic of China.
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54
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Weiß M, Brehm M. Exploring Free Energy Profiles of Enantioselective Organocatalytic Aldol Reactions under Full Solvent Influence. Molecules 2020; 25:E5861. [PMID: 33322424 PMCID: PMC7764805 DOI: 10.3390/molecules25245861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/05/2020] [Accepted: 12/08/2020] [Indexed: 12/29/2022] Open
Abstract
We present a computational study on the enantioselectivity of organocatalytic proline-catalyzed aldol reactions between aldehydes in dimethylformamide (DMF). To explore the free energy surface of the reaction, we apply two-dimensional metadynamics on top of ab initio molecular dynamics (AIMD) simulations with explicit solvent description on the DFT level of theory. We avoid unwanted side reactions by utilizing our newly developed hybrid AIMD (HyAIMD) simulation scheme, which adds a simple force field to the AIMD simulation to prevent unwanted bond breaking and formation. Our condensed phase simulation results are able to nicely reproduce the experimental findings, including the main stereoisomer that is formed, and give a correct qualitative prediction of the change in syn:anti product ratio with different substituents. Furthermore, we give a microscopic explanation for the selectivity. We show that both the explicit description of the solvent and the inclusion of entropic effects are vital to a good outcome-metadynamics simulations in vacuum and static nudged elastic band (NEB) calculations yield significantly worse predictions when compared to the experiment. The approach described here can be applied to a plethora of other enantioselective or organocatalytic reactions, enabling us to tune the catalyst or determine the solvent with the highest stereoselectivity.
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Affiliation(s)
| | - Martin Brehm
- Institut für Chemie, Martin-Luther-Universität Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120 Halle (Saale), Germany;
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55
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Abstract
Formation of carbon-carbon bonds is central to synthetic chemistry. The aldol reaction provides the chemistry to fuse a nucleophilic enolate with an electrophilic aldehyde to form a new CC bond between two newly formed asymmetric centers. A major challenge in the reaction is steering the stereochemistry of the product. Aldolases are lyases that catalyze aldol reactions as well as the retro-aldol cleavage, and are abundant in cellular metabolism. Due to the often exquisite stereoselectivity in aldolase catalyzed carboligation reactions, these enzymes are gaining increased interest as potentially important tools in asymmetric synthesis of new useful compounds. Fructose 6-phosphate aldolase from Escherichia coli (FSA) is of special interest because of its very unusual independence of phosphorylated reactant substrates. The current text describes the protein engineering of FSA, applying principles of directed evolution, for the generation, production and characterization of new aldolase variants. A range of new enantiopure polyhydroxylated compounds were produced applying isolated FSA variants.
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Affiliation(s)
- Mikael Widersten
- Department of Chemistry-BMC, Uppsala University, Uppsala, Sweden.
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56
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Shim JH, Kim MJ, Lee JY, Kim KH, Ha DC. Organocatalytic asymmetric aldol reaction using protonated chiral 1,2-diamines. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152295] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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57
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Zhang J, Qian F, Dong F, Wang Q, Yang J, Jiang Y, Yang S. De Novo Engineering of Corynebacterium glutamicum for l-Proline Production. ACS Synth Biol 2020; 9:1897-1906. [PMID: 32627539 DOI: 10.1021/acssynbio.0c00249] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
l-Proline is an important amino acid that has various industrial applications. Industrial l-proline-producing strains are obtained by the mutagenesis of Corynebacterium glutamicum. In this study, the optimized C. glutamicum genome-editing tools were further applied in the de novo construction of a hyper-l-proline-producing strain. Overexpression of a feedback inhibition-resistant γ-glutamic kinase mutant ProBG149K, deletion of a proline dehydrogenase to block l-proline degradation, overexpression of glutamate dehydrogenase to increase glutamate synthesis flux, the mutation of 6-phosphate gluconate dehydrogenase and glucose-6-phosphate-dehydrogenase in the pentose phosphate pathway to enhance NADPH supply, the deletion of pyruvate aminotransferase to decrease the byproduct l-alanine synthesis, and weakening of α-ketoglutarate dehydrogenase to regulate the TCA cycle were combined to obtain ZQJY-9. ZQJY-9 produced 19.68 ± 0.22 g/L of l-proline in flask fermentation and was also demonstrated at the 3 L bioreactor level by fed-batch fermentation producing 120.18 g/L of l-proline at 76 h with the highest productivity of 1.581 g/L/h.
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Affiliation(s)
- Jiao Zhang
- Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fenghui Qian
- Huzhou Center of Industrial Biotechnology, Shanghai Institutes for Biological Sciences, Huzhou 313000, China
| | - Feng Dong
- Huzhou Center of Industrial Biotechnology, Shanghai Institutes for Biological Sciences, Huzhou 313000, China
| | - Qingzhuo Wang
- Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Junjie Yang
- Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yu Jiang
- Huzhou Center of Industrial Biotechnology, Shanghai Institutes for Biological Sciences, Huzhou 313000, China
- Shanghai Taoyusheng Biotechnology Co., Ltd, Shanghai 201203, China
| | - Sheng Yang
- Key Laboratory of Synthetic Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- Huzhou Center of Industrial Biotechnology, Shanghai Institutes for Biological Sciences, Huzhou 313000, China
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58
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Gaddam GR, Dubey PK, Chittireddy VRR. Synthesis of Indolyl Pyrazole Scaffolds as Potential Anti-cancer Agents and their Molecular Modelling Studies. LETT DRUG DES DISCOV 2020. [DOI: 10.2174/1570180816666191024103534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background::
Indole and pyrazoles are one of the prime structural units in the field of
medicinal chemistry and have been reported to exhibit a variety of biological activities specifically
anti-cancer. In view of their medicinal significance, we synthesized a conjugate of the two moieties
to get access to newer and potential anti-cancer agents.
Methods:
Indolyl pyrazoles [3-(1,3-diphenyl-1H-pyrazol-4-yl)-2-(1-methyl-1H-indole-3-carbon
yl)acrylonitriles] (4a-l) were synthesized by adopting simple and greener protocol and all the synthesized
derivatives were docked against Bcl-2 protein and the selected chemical moieties were
screened for their cytotoxicity by using the MTT assay.
Results: :
All the synthesized compounds were docked against BCL-2 protein in order to understand
their binding pattern. Among the 12 compounds docked, 4d, 4f, 4h, 4j, and 4l compounds exhibited
better protein binding interactions and the same were screened for their anti-cancer activity against
A549 (lung) cancer cell lines at a concentration of 100 μM using Doxorubicin as standard. Substitutions
such as N-benzyl, N-ethyl groups and halogen groups such as Br, Cl on indole ring showed
moderate activity against A-549 cell lines.
Conclusion::
Among the 5 indolyl pyrazole derivatives screened, compounds 4h and 4j showed significantly
better activity with an IC50 of 33.12 and 34.24 μM, respectively. Further, structural tweaking
of the synthesized new chemical entities may lead to potential hit/lead-like molecules.
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Affiliation(s)
- Ganga Reddy Gaddam
- Department of Chemistry, Jawaharlal Nehru Technological University Hyderabad, Kukatpally, Hyderabad, Telangana 500 085, India
| | - Pramod Kumar Dubey
- Department of Chemistry, Jawaharlal Nehru Technological University Hyderabad, Kukatpally, Hyderabad, Telangana 500 085, India
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59
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Heerdegen D, Junker J, Dittrich S, Mayer P, Bracher F. Traceless Isoprenylation of Aldehydes via
N
‐Boc‐
N
‐(1,1‐dimethylallyl)hydrazones. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Desirée Heerdegen
- Department of Pharmacy ‐ Center for Drug Research Ludwig‐Maximilians University Butenandtstr. 5‐13 81377 Munich Germany
| | - Julia Junker
- Department of Pharmacy ‐ Center for Drug Research Ludwig‐Maximilians University Butenandtstr. 5‐13 81377 Munich Germany
| | - Sebastian Dittrich
- Department of Pharmacy ‐ Center for Drug Research Ludwig‐Maximilians University Butenandtstr. 5‐13 81377 Munich Germany
| | - Peter Mayer
- Department of Chemistry Ludwig‐Maximilians University Butenandtstr. 5‐13 81377 Munich Germany
| | - Franz Bracher
- Department of Pharmacy ‐ Center for Drug Research Ludwig‐Maximilians University Butenandtstr. 5‐13 81377 Munich Germany
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Abstract
The proline-catalysed asymmetric aldol reaction is usually carried out in highly dipolar aprotic solvents (dimethylsulfoxide, dimethylformamide, acetonitrile) where proline presents an acceptable solubility. Protic solvents are generally characterized by poor stereocontrol (e.g., methanol) or poor reactivity (e.g., water). Here, we report that water/methanol mixtures are exceptionally simple and effective reaction media for the intermolecular organocatalytic aldol reaction using the simple proline as the catalyst.
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62
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Pellissier H. Recent Developments in Enantioselective Multicatalyzed Tandem Reactions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000210] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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63
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Kaur N, Verma Y, Grewal P, Ahlawat N, Bhardwaj P, Jangid NK. Photochemical C–N bond forming reactions for the synthesis of five-membered fused N-heterocycles. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1713378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Neha Ahlawat
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pranshu Bhardwaj
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
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64
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Wang Q, Tang Y, Wu L, Xu W, Shen Y, Shi L, Dai S. Thermal and magnetic dual-responsive l-proline nanohybrids for aqueous asymmetric aldol reaction. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104508] [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]
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65
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Thomson CJ, Barber DM, Dixon DJ. Catalytic Enantioselective Direct Aldol Addition of Aryl Ketones to α‐Fluorinated Ketones. Angew Chem Int Ed Engl 2020; 59:5359-5364. [DOI: 10.1002/anie.201916129] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Indexed: 01/17/2023]
Affiliation(s)
- Connor J. Thomson
- Department of ChemistryChemistry Research LaboratoryUniversity of Oxford Mansfield Road Oxford OX1 3TA UK
| | - David M. Barber
- Research & DevelopmentWeed Control ChemistryBayer AG, Crop Science Division Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Darren J. Dixon
- Department of ChemistryChemistry Research LaboratoryUniversity of Oxford Mansfield Road Oxford OX1 3TA UK
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66
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Ivantcova PM, Kudryavtsev KV. Chemoselectivity issues of the asymmetric interaction between cyclohexanone, β-nitrostyrene, and benzoic acid under 5-aryl prolinate's organocatalysis. Chirality 2020; 32:833-841. [PMID: 32168390 DOI: 10.1002/chir.23212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 02/06/2020] [Accepted: 02/11/2020] [Indexed: 11/10/2022]
Abstract
4-l-menthyloxycarbonyl 5-aryl prolinates were studied as organocatalysts of a novel three-component reaction of cyclohexanone, benzoic acid, and β-nitrostyrene. The presence of ortho-halogen atom in 5-aryl fragment of the catalyst is favored for driving the formation of chiral 7a-hydroxyoctahydro-2H-indol-2-one scaffold. 5-(o-Chlorophenyl) prolinate selectively afforded 3-phenyl-7a-hydroxyoctahydro-2H-indol-2-one with ee 63%, whereas 5-phenyl prolinate led to conjugation of β-nitrostyrene to cyclohexanone (the Michael adduct). Plausible chlorine effect is accounted for the specific interaction of the 5-aryl prolinate enamine intermediate with β-nitrostyrene in the transition state.
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Affiliation(s)
- Polina M Ivantcova
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russian Federation
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67
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Frenkel-Pinter M, Samanta M, Ashkenasy G, Leman LJ. Prebiotic Peptides: Molecular Hubs in the Origin of Life. Chem Rev 2020; 120:4707-4765. [PMID: 32101414 DOI: 10.1021/acs.chemrev.9b00664] [Citation(s) in RCA: 148] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The fundamental roles that peptides and proteins play in today's biology makes it almost indisputable that peptides were key players in the origin of life. Insofar as it is appropriate to extrapolate back from extant biology to the prebiotic world, one must acknowledge the critical importance that interconnected molecular networks, likely with peptides as key components, would have played in life's origin. In this review, we summarize chemical processes involving peptides that could have contributed to early chemical evolution, with an emphasis on molecular interactions between peptides and other classes of organic molecules. We first summarize mechanisms by which amino acids and similar building blocks could have been produced and elaborated into proto-peptides. Next, non-covalent interactions of peptides with other peptides as well as with nucleic acids, lipids, carbohydrates, metal ions, and aromatic molecules are discussed in relation to the possible roles of such interactions in chemical evolution of structure and function. Finally, we describe research involving structural alternatives to peptides and covalent adducts between amino acids/peptides and other classes of molecules. We propose that ample future breakthroughs in origin-of-life chemistry will stem from investigations of interconnected chemical systems in which synergistic interactions between different classes of molecules emerge.
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Affiliation(s)
- Moran Frenkel-Pinter
- NSF/NASA Center for Chemical Evolution, https://centerforchemicalevolution.com/.,School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Mousumi Samanta
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Gonen Ashkenasy
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Luke J Leman
- NSF/NASA Center for Chemical Evolution, https://centerforchemicalevolution.com/.,Department of Chemistry, The Scripps Research Institute, La Jolla, California 92037, United States
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68
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Thomson CJ, Barber DM, Dixon DJ. Catalytic Enantioselective Direct Aldol Addition of Aryl Ketones to α‐Fluorinated Ketones. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916129] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Connor J. Thomson
- Department of ChemistryChemistry Research LaboratoryUniversity of Oxford Mansfield Road Oxford OX1 3TA UK
| | - David M. Barber
- Research & DevelopmentWeed Control ChemistryBayer AG, Crop Science Division Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Darren J. Dixon
- Department of ChemistryChemistry Research LaboratoryUniversity of Oxford Mansfield Road Oxford OX1 3TA UK
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69
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Yoo JW, Seo Y, Park JB, Kim YG. Two-way homologation of aliphatic aldehydes: Both one-carbon shortening and lengthening via the same intermediate. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130883] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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70
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Lu H, Lv J, Zhou C, Kato T, Liu Y, Maruoka K. Practical Synthesis of High‐Performance Amino Tf‐Amide Organocatalysts for Asymmetric Aldol Reactions. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900730] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hanbin Lu
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
| | - Jiamin Lv
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
| | - Canhua Zhou
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
| | - Terumasa Kato
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
| | - Yan Liu
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
| | - Keiji Maruoka
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
- Graduate School of Pharmaceutical SciencesKyoto University Sakyo, Kyoto 606-8501 Japan
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71
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An F, Maji B, Min E, Ofial AR, Mayr H. Basicities and Nucleophilicities of Pyrrolidines and Imidazolidinones Used as Organocatalysts. J Am Chem Soc 2020; 142:1526-1547. [DOI: 10.1021/jacs.9b11877] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Feng An
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 München, Germany
| | - Biplab Maji
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 München, Germany
| | - Elizabeth Min
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 München, Germany
| | - Armin R. Ofial
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 München, Germany
| | - Herbert Mayr
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 München, Germany
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72
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Kim W, Casalme LO, Umezawa T, Matsuda F, Otomo R, Kamiya Y. A Reliable Method to Create Adjacent Acid-Base Pair Sites on Silica through Hydrolysis of Pre-anchored Amide. CHEM LETT 2020. [DOI: 10.1246/cl.190773] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Wontae Kim
- Graduate School of Environmental Science, Hokkaido University, Kita 10, Nishi 5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Loida O. Casalme
- Graduate School of Environmental Science, Hokkaido University, Kita 10, Nishi 5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Taiki Umezawa
- Faculty of Environmental Earth Science, Hokkaido University, Kita 10, Nishi 5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Fuyuhiko Matsuda
- Faculty of Environmental Earth Science, Hokkaido University, Kita 10, Nishi 5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Ryoichi Otomo
- Faculty of Environmental Earth Science, Hokkaido University, Kita 10, Nishi 5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Yuichi Kamiya
- Faculty of Environmental Earth Science, Hokkaido University, Kita 10, Nishi 5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
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73
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Kaur N, Devi M, Verma Y, Grewal P, Bhardwaj P, Ahlawat N, Jangid NK. Photochemical Synthesis of Fused Five-membered O-heterocycles. CURRENT GREEN CHEMISTRY 2019. [DOI: 10.2174/2213346106666190904145200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Some transformations are not possible with ground-state reactions even in the presence of a
catalyst, hence they are performed under photochemical conditions. Electron transfer occurs even with
the photochemical excitement of one molecule where redox reaction is not possible at the ground
state. The side products are obtained from ground-state reactions. For C-C bond formation during photochemical
reactions, there is no requirement of any chemical activation of the substrates. Therefore,
these reactions are presented here for the synthesis of fused five-membered O-heterocycles in the context
of sustainable processes from 1964 to 2019.
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Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Meenu Devi
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Pranshu Bhardwaj
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Neha Ahlawat
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
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74
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Uddin MN, Knight JD, Rastelli EJ, Soubra-Ghaoui C, Albright TA, Wu CH, Wu JI, Coltart DM. On the Mechanism of the Asymmetric Aldol Addition of Chiral N-Amino Cyclic Carbamate Hydrazones: Evidence of Non-Curtin-Hammett Behavior. Chemistry 2019; 25:16037-16047. [PMID: 31650641 PMCID: PMC7182504 DOI: 10.1002/chem.201902388] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 10/19/2019] [Indexed: 01/25/2023]
Abstract
he mechanistic details of the aldol addition of N-amino cyclic carbamate (ACC) hydrazones is provided herein from both an experimental and computational perspective. When the transformation is carried out at room temperature the anti-aldol product is formed exclusively. Under these conditions the anti- and syn-aldolate intermediates are in equilibrium and the transformation is under thermodynamic control. The anti-aldolate that leads to the anti-aldol product was calculated to be 3.7 kcal mol-1 lower in energy at room temperature than that leading to the syn-aldol product, which sufficiently accounts for the exclusive formation of the anti-aldol product. When the reaction is conducted at -78 °C it is under kinetic control and favors formation of the syn-aldol addition product. In this case, it was found that a solvent separated aza-enolate anion and aldehyde form a σ-intermediate in which the lithium cation is coordinated to the aldehyde. The σ-intermediate collapses with a very small activation barrier to form the β-alkoxy hydrazone intermediate. The chiral nonracemic lithium aza-enolate discriminates between the two diastereotopic faces of the pro-chiral aldehyde, and there is no rapid direct pathway that interconverts the two diastereomeric intermediates. Consequently, the reaction does not follow the Curtin-Hammett principle and the stereochemical outcome at low temperature instead depends on the relative energies of the two σ-intermediates.
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Affiliation(s)
- Md. Nasir Uddin
- Department of Chemistry, University of Houston, Houston, Texas 77204 (USA)
| | - John D. Knight
- Department of Chemistry, University of Houston, Houston, Texas 77204 (USA)
| | - Ettore J. Rastelli
- Department of Chemistry, University of Houston, Houston, Texas 77204 (USA)
| | - Chirine Soubra-Ghaoui
- Department of Chemistry and Physics, University of St. Thomas, Houston, Texas 77006 (USA)
| | - Thomas A. Albright
- Department of Chemistry, University of Houston, Houston, Texas 77204 (USA)
| | - Chia-Hua Wu
- Department of Chemistry, University of Houston, Houston, Texas 77204 (USA)
| | - Judy I. Wu
- Department of Chemistry, University of Houston, Houston, Texas 77204 (USA)
| | - Don M. Coltart
- Department of Chemistry, University of Houston, Houston, Texas 77204 (USA)
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75
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Lafzi F, Kilic H, Tanriver G, Avcı ÖN, Catak S, Saracoglu N. Design and synthesis of novel indoline-(thio)urea hybrids. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1675706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Ferruh Lafzi
- Department of Chemistry Faculty of Sciences, Atatürk University, Erzurum, Turkey
| | - Haydar Kilic
- Department of Chemistry Faculty of Sciences, Atatürk University, Erzurum, Turkey
- Oltu Vocational Training School, Atatürk University, Erzurum, Turkey
| | - Gamze Tanriver
- Department of Chemistry, Bogazici University Bebek, Istanbul, Turkey
| | - Öyküm Naz Avcı
- Department of Chemistry, Bogazici University Bebek, Istanbul, Turkey
| | - Saron Catak
- Department of Chemistry, Bogazici University Bebek, Istanbul, Turkey
| | - Nurullah Saracoglu
- Department of Chemistry Faculty of Sciences, Atatürk University, Erzurum, Turkey
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76
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Isosteric expansion of the structural diversity of chiral ligands: Design and application of proline-based N,N′-dioxide ligands for copper-catalyzed enantioselective Henry reactions. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130492] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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77
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Diaz-Muñoz G, Miranda IL, Sartori SK, de Rezende DC, Alves Nogueira Diaz M. Use of chiral auxiliaries in the asymmetric synthesis of biologically active compounds: A review. Chirality 2019; 31:776-812. [PMID: 31418934 DOI: 10.1002/chir.23103] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 05/13/2019] [Accepted: 05/22/2019] [Indexed: 01/16/2023]
Abstract
This review article describes the use of some of the most popular chiral auxiliaries in the asymmetric synthesis of biologically active compounds. Chiral auxiliaries derived from naturally occurring compounds, such as amino acids, carbohydrates, and terpenes, are considered essential tools for the construction of highly complex molecules. We highlight the auxiliaries of Evans, Corey, Yamada, Enders, Oppolzer, and Kunz, which led to remarkable progress in asymmetric synthesis in the last decades and continue to bring advances until the present day.
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Affiliation(s)
- Gaspar Diaz-Muñoz
- Department of Chemistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Izabel Luzia Miranda
- Department of Chemistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Suélen Karine Sartori
- Department of Chemistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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78
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Dulger H, Sari O, Demirel N, Erdem SS. Computational Insight Into the Enantioselectivity of Homoboroproline Catalyzed Asymmetric Aldol Reaction. ChemistrySelect 2019. [DOI: 10.1002/slct.201901737] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Habibe Dulger
- Department of Chemistry, Faculty of Arts and SciencesMarmara University, Goztepe Campus 34722 Istanbul Turkey
- Department of ChemistryKirsehir Ahi Evran University 40100 Kirsehir Turkey
| | - Ozlem Sari
- Department of ChemistryKirsehir Ahi Evran University 40100 Kirsehir Turkey
| | - Nadir Demirel
- Department of ChemistryKirsehir Ahi Evran University 40100 Kirsehir Turkey
| | - Safiye S. Erdem
- Department of Chemistry, Faculty of Arts and SciencesMarmara University, Goztepe Campus 34722 Istanbul Turkey
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79
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Santoyo BM, González-Romero C, Zárate-Zárate D, Hernández-Benitez RI, Pelayo V, Barrera E, Escalante CH, Fuentes-Benites A, Martínez-Morales G, López J, Vázquez MA, Delgado F, Jiménez-Vázquez HA, Tamariz J. Enantiopure 4-oxazolin-2-ones and 4-methylene-2-oxazolidinones as chiral building blocks in a divergent asymmetric synthesis of heterocycles. Chirality 2019; 31:719-749. [PMID: 31318100 DOI: 10.1002/chir.23109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 06/13/2019] [Accepted: 06/14/2019] [Indexed: 12/31/2022]
Abstract
Enantiopure 3-((R)- and 3-((S)-1-phenylethyl)-4-oxazoline-2-ones were evaluated as chiral building blocks for the divergent construction of heterocycles with stereogenic quaternary centers. The N-(R)- or N-(S)-1-phenylethyl group of these compounds proved to be an efficient chiral auxiliary for the asymmetric induction of the 4- and 5-positions of the 4-oxazolin-2-one ring through thermal and MW-promoted nucleophilic conjugated addition to Michael acceptors and alkyl halides. The resulting adducts were transformed via a cascade process into fused six-membered carbo- and heterocycles. The structure of the reaction products depended on the electrophiles and reaction conditions used. Alternative isomeric 4-methylene-2-oxazolidinones served as chiral precursors for a versatile and divergent approach to highly substituted cyclic carbamates. DFT quantum calculations showed that the formation of bicyclic pyranyl compounds was generated by a diastereoselective concerted hetero-Diels-Alder cycloaddition.
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Affiliation(s)
- Blanca M Santoyo
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Carlos González-Romero
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico.,Departamento de Química Orgánica, Facultad de Química, Universidad Autónoma del Estado de México, Toluca, State of Mexico, Mexico
| | - Daniel Zárate-Zárate
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - R Israel Hernández-Benitez
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Vanessa Pelayo
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Edson Barrera
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Carlos H Escalante
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Aydeé Fuentes-Benites
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico.,Departamento de Química Orgánica, Facultad de Química, Universidad Autónoma del Estado de México, Toluca, State of Mexico, Mexico
| | - Guadalupe Martínez-Morales
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Julio López
- Departamento de Química, Universidad de Guanajuato, Guanajuato, Guanajuato, Mexico
| | - Miguel A Vázquez
- Departamento de Química, Universidad de Guanajuato, Guanajuato, Guanajuato, Mexico
| | - Francisco Delgado
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Hugo A Jiménez-Vázquez
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Joaquín Tamariz
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
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80
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Kaur N, Bhardwaj P, Devi M, Verma Y, Grewal P. Photochemical reactions in five and six-membered polyheterocycles synthesis. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1622732] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pranshu Bhardwaj
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Meenu Devi
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
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81
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Dodda R, Samanta S, Su M, Zhao JCG. Synthesis of 1,2-Diamine Bifunctional Catalysts for the Direct Aldol Reaction Through Probing the Remote Amide Hydrogen. CURRENT ORGANOCATALYSIS 2019. [DOI: 10.2174/2213337206666190301155247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Background:
While proline can catalyze the asymmetric direct aldol reactions, its catalytic
activity and catalyst turnover are both low. To improve the catalytic efficiency, many prolinebased
organocatalysts have been developed. In this regard, prolinamide-based bifunctional catalysts
have been demonstrated by us and others to be highly efficient catalysts for the direct aldol reactions.
Results:
Using the β-acetamido- and β-tosylamidoprolinamide catalysts, the highly enantio- and diastereoselective
direct aldol reactions between enolizable ketones and aldehydes were achieved (up to
>99% ee, 98:2 dr). A low catalyst loading of only 2-5 mol % of the β-tosylamidoprolinamide catalyst
was needed to obtain the desired aldol products in good to high yields and high stereoselectivities.
Methods:
By carefully adjusting the hydrogen bonding ability of the remote β-amide hydrogen of the
1,2-diamine-based prolinamide bifunctional catalysts, the catalytic activity and the asymmetric induction
of these catalysts were significantly improved for the direct aldol reaction between aldehydes
and enolizable ketones.
Conclusion:
Some highly efficient 1,2-diamine-based bifunctional prolinamide catalysts have been
developed through probing the remote β-amide hydrogen for its hydrogen bonding capability. These
catalysts are easy to synthesize and high enantioselectivities may be achieved at very low catalyst
loadings.
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Affiliation(s)
- Rajasekhar Dodda
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Sampak Samanta
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - Matthew Su
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
| | - John Cong-Gui Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, United States
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82
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Affiliation(s)
| | - Deepa
- Department of ChemistryUniversity of Delhi Delhi 110007 India
| | - Surendra Singh
- Department of ChemistryUniversity of Delhi Delhi 110007 India
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83
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Šulce A, Mitschke N, Azov V, Kunz S. Molecular Insights into the Ligand‐Reactant Interactions of Pt Nanoparticles Functionalized with α‐Amino Acids as Asymmetric Catalysts for β‐Keto Esters. ChemCatChem 2019. [DOI: 10.1002/cctc.201900238] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anda Šulce
- Institute of Applied and Physical Chemistry (IAPC)Center for Environmental Research and Sustainable TechnologyUniversity of Bremen Leobener Straße 6 28359 Bremen Germany
| | - Nico Mitschke
- Institute for Chemistry and Biology of the Marine Environment (ICBM)University of Oldenburg Carl-von-Ossietzky-Straße 9–11 26111 Oldenburg Germany
| | - Vladimir Azov
- Department of ChemistryUniversity of the Free State PO Box 339 Bloemfontein 9300 South Africa
| | - Sebastian Kunz
- Institute of Applied and Physical Chemistry (IAPC)Center for Environmental Research and Sustainable TechnologyUniversity of Bremen Leobener Straße 6 28359 Bremen Germany
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84
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Xu EJ, Song Y, Wei ZL, Wang R, Duan HF, Lin YJ, Yang QB, Li YX. Novel chiral proline-based organocatalysts with amide and thiourea–amine units for highly efficient asymmetric aldol reaction in saturated brine without additives. CAN J CHEM 2019. [DOI: 10.1139/cjc-2018-0352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A series of novel proline-based organocatalysts with amide and thiourea-amine units (7a–7f) were developed and evaluated in the asymmetric aldol reaction of 4-nitrobenzaldehyde with cyclohexanone. The organocatalyst (7c or 7d, 5 mol%) exhibited efficient catalytic activity to afford aldol products in high diastereoselectivity (up to >99:1), enantioselectivity (up to >99%), and yield (up to >96%) at 0 °C in saturated brine without adding an acid. Aldol products of benzaldehyde derivatives almost universally provide high diastereoselectivity and enantioselectivity.
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Affiliation(s)
- En-Jie Xu
- College of Chemistry, Jilin University, Changchun 130012, China
- College of Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin 132022, China
| | - Yan Song
- College of Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin 132022, China
| | - Zhong-Lin Wei
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Rui Wang
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Hai-Feng Duan
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Ying-Jie Lin
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Qing-Biao Yang
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Yao-Xian Li
- College of Chemistry, Jilin University, Changchun 130012, China
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85
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Guruge C, Rfaish SY, Byrd C, Yang S, Starrett AK, Guisbert E, Nesnas N. Caged Proline in Photoinitiated Organocatalysis. J Org Chem 2019; 84:5236-5244. [PMID: 30908906 DOI: 10.1021/acs.joc.9b00220] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Organocatalysis is an emerging field, in which small metal-free organic structures catalyze a diversity of reactions with a remarkable stereoselectivity. The ability to selectively switch on such pathways upon demand has proven to be a valuable tool in biological systems. Light as a trigger provides the ultimate spatial and temporal control of activation. However, there have been limited examples of phototriggered catalytic systems. Herein, we describe the synthesis and application of a caged proline system that can initiate organocatalysis upon irradiation. The caged proline was generated using the highly efficient 4-carboxy-5,7-dinitroindolinyl (CDNI) photocleavable protecting group in a four-step synthesis. Advantages of this system include water solubility, biocompatibility, high quantum yield for catalyst release, and responsiveness to two-photon excitation. We showed the light-triggered catalysis of a crossed aldol reaction, a Mannich reaction, and a self-aldol condensation reaction. We also demonstrated light-initiated catalysis, leading to the formation of a biocide in situ, which resulted in the growth inhibition of E. coli, with as little as 3 min of irradiation. This technique can be broadly applied to other systems, by which the formation of active forms of drugs can be catalytically assembled remotely via two-photon irradiation.
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Affiliation(s)
- Charitha Guruge
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Saad Y Rfaish
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Chanel Byrd
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Shukun Yang
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Anthony K Starrett
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Eric Guisbert
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
| | - Nasri Nesnas
- Department of Biomedical and Chemical Engineering and Sciences , Florida Institute of Technology , Melbourne , Florida 32901 , United States
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86
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Kaur N. Synthesis of Three‐Membered and Four‐Membered Heterocycles with the Assistance of Photochemical Reactions. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3491] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry Banasthali Vidyapith Banasthali Rajasthan 304022 India
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87
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Concerted Catalysis by Nanocellulose and Proline in Organocatalytic Michael Additions. Molecules 2019; 24:molecules24071231. [PMID: 30934821 PMCID: PMC6480416 DOI: 10.3390/molecules24071231] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 03/23/2019] [Accepted: 03/27/2019] [Indexed: 12/25/2022] Open
Abstract
Cellulose nanofibers (CNFs) have recently attracted much attention as catalysts in various reactions. Organocatalysts have emerged as sustainable alternatives to metal-based catalysts in green organic synthesis, with concerted systems containing CNFs that are expected to provide next-generation catalysis. Herein, for the first time, we report that a representative organocatalyst comprising an unexpected combination of 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO)-oxidized CNFs and proline shows significantly enhanced catalytic activity in an asymmetric Michael addition.
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88
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Jette CI, Geibel I, Bachman S, Hayashi M, Sakurai S, Shimizu H, Morgan JB, Stoltz BM. Palladium-Catalyzed Construction of Quaternary Stereocenters by Enantioselective Arylation of γ-Lactams with Aryl Chlorides and Bromides. Angew Chem Int Ed Engl 2019; 58:4297-4301. [PMID: 30677201 DOI: 10.1002/anie.201814475] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 01/20/2019] [Indexed: 11/11/2022]
Abstract
Herein, we report the first Pd-catalyzed enantioselective arylation of α-substituted γ-lactams. Two sets of conditions were developed for this transformation, allowing for the use of either aryl chlorides or bromides as electrophiles. Utilizing a highly electron-rich dialkylphosphine ligand we have been able to construct α-quaternary centers in good yields (up to 91 % yield) and high enantioselectivities (up to 97 % ee).
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Affiliation(s)
- Carina I Jette
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd. MC 101-20, Pasadena, CA, 91125, USA
| | - Irina Geibel
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd. MC 101-20, Pasadena, CA, 91125, USA
| | - Shoshana Bachman
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd. MC 101-20, Pasadena, CA, 91125, USA
| | - Masaki Hayashi
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd. MC 101-20, Pasadena, CA, 91125, USA
| | - Shunya Sakurai
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd. MC 101-20, Pasadena, CA, 91125, USA
| | - Hideki Shimizu
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd. MC 101-20, Pasadena, CA, 91125, USA
| | - Jeremy B Morgan
- Dobo Hall, Department of Chemistry and Biochemistry, University of North Carolina, 601 S. College Rd., Wilmington, NC, 28403, USA
| | - Brian M Stoltz
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd. MC 101-20, Pasadena, CA, 91125, USA
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89
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Heravi MM, Zadsirjan V, Heydari M, Masoumi B. Organocatalyzed Asymmetric Friedel‐Crafts Reactions: An Update. CHEM REC 2019. [DOI: 10.1002/tcr.201800190] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Majid M. Heravi
- Department of ChemistrySchool of ScienceAlzahra University POBox 1993891176, Vanak Tehran Iran Tel.: +98 21 88044051 fax: +98 21 88041344
| | - Vahideh Zadsirjan
- Department of ChemistrySchool of ScienceAlzahra University POBox 1993891176, Vanak Tehran Iran Tel.: +98 21 88044051 fax: +98 21 88041344
| | - Masumeh Heydari
- Department of ChemistrySchool of ScienceAlzahra University POBox 1993891176, Vanak Tehran Iran Tel.: +98 21 88044051 fax: +98 21 88041344
| | - Baharak Masoumi
- Department of ChemistrySchool of ScienceAlzahra University POBox 1993891176, Vanak Tehran Iran Tel.: +98 21 88044051 fax: +98 21 88041344
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90
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Jette CI, Geibel I, Bachman S, Hayashi M, Sakurai S, Shimizu H, Morgan JB, Stoltz BM. Palladium‐Catalyzed Construction of Quaternary Stereocenters by Enantioselective Arylation of γ‐Lactams with Aryl Chlorides and Bromides. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814475] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Carina I. Jette
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd. MC 101-20 Pasadena CA 91125 USA
| | - Irina Geibel
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd. MC 101-20 Pasadena CA 91125 USA
| | - Shoshana Bachman
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd. MC 101-20 Pasadena CA 91125 USA
| | - Masaki Hayashi
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd. MC 101-20 Pasadena CA 91125 USA
| | - Shunya Sakurai
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd. MC 101-20 Pasadena CA 91125 USA
| | - Hideki Shimizu
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd. MC 101-20 Pasadena CA 91125 USA
| | - Jeremy B. Morgan
- Dobo Hall Department of Chemistry and Biochemistry University of North Carolina 601 S. College Rd. Wilmington NC 28403 USA
| | - Brian M. Stoltz
- Warren And Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd. MC 101-20 Pasadena CA 91125 USA
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91
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Kooti M, Kooshki F, Nasiri E. Preparation and characterization of magnetic graphene nanocomposite containing Cu(proline)2 as catalyst for asymmetric aldol reactions. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-03755-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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92
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Festa AA, Storozhenko OA, Golantsov NE, Subramani K, Novikov RA, Zaitseva SO, Baranov MS, Varlamov AV, Voskressensky LG. Homophtalonitrile for Multicomponent Reactions: Syntheses and Optical Properties of o-Cyanophenyl- or Indol-3-yl-Substituted Chromeno[2,3- c]isoquinolin-5-Amines. ChemistryOpen 2019; 8:23-30. [PMID: 30652060 PMCID: PMC6331947 DOI: 10.1002/open.201800207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Indexed: 11/17/2022] Open
Abstract
Malononitrile is a useful reagent for multicomponent reactions with hundreds of methods developed. In this paper, we suggest α‐(cyano)‐o‐tolunitrile (homophtalonitrile) to work as a vinylogous malononitrile. Thus, a organocatalytic pseudo‐three‐component reaction of homopthalonitrile (2 equiv) and o‐hydroxybenzaldehyde, leading to the diastereoselective formation of 5‐amino‐12H‐chromeno[2,3‐c]isoquinolin‐12‐yl)(cyano)methyl)benzonitriles, was discovered. The possibility to employ other nucleophiles was demonstrated for indoles, and a sequential three‐component reaction of homophtalonitrile, o‐hydroxybenzaldehyde, and (aza)indole, giving 12‐(1H‐Indol‐3‐yl)‐12H‐chromeno[2,3‐c]isoquinolin‐5‐amines, was developed. The photophysical properties of the synthesized compounds have been studied, revealing high fluorescence quantum yields (42–70 %) for indol‐3‐yl substituted 12H‐chromeno[2,3‐c]isoquinolin‐5‐amines and reversible fluorescence quenching under acidic conditions.
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Affiliation(s)
- Alexey A Festa
- Organic Chemistry Department, Science Faculty RUDN University Miklukho-Maklaya st. 6 117198 Moscow Russian Federation
| | - Olga A Storozhenko
- Organic Chemistry Department, Science Faculty RUDN University Miklukho-Maklaya st. 6 117198 Moscow Russian Federation
| | - Nikita E Golantsov
- Organic Chemistry Department, Science Faculty RUDN University Miklukho-Maklaya st. 6 117198 Moscow Russian Federation
| | - Karthikeyan Subramani
- Organic Chemistry Department, Science Faculty RUDN University Miklukho-Maklaya st. 6 117198 Moscow Russian Federation
| | - Roman A Novikov
- Engelhardt Institute of Molecular Biology Russian Academy of Sciences Vavilova st., 32 119991 Moscow Russian Federation
| | - Snezhana O Zaitseva
- Institute of Bioorganic Chemistry Russian Academy of Sciences Miklukho-Maklaya 16/10 117997 Moscow Russian Federation
| | - Mikhail S Baranov
- Institute of Bioorganic Chemistry Russian Academy of Sciences Miklukho-Maklaya 16/10 117997 Moscow Russian Federation.,Pirogov Russian National Research Medical University Ostrovitianov 1 117997 Moscow Russian Federation
| | - Alexey V Varlamov
- Organic Chemistry Department, Science Faculty RUDN University Miklukho-Maklaya st. 6 117198 Moscow Russian Federation
| | - Leonid G Voskressensky
- Organic Chemistry Department, Science Faculty RUDN University Miklukho-Maklaya st. 6 117198 Moscow Russian Federation
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93
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Firouzi-Haji R, Maleki A. L-Proline-Functionalized Fe3
O4
Nanoparticles as an Efficient Nanomagnetic Organocatalyst for Highly Stereoselective One-Pot Two-Step Tandem Synthesis of Substituted Cyclopropanes. ChemistrySelect 2019. [DOI: 10.1002/slct.201802608] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Razieh Firouzi-Haji
- Catalysts and Organic Synthesis Research Laboratory; Department of Chemistry; Iran University of Science and Technology; Tehran 16846-13114 Iran
| | - Ali Maleki
- Catalysts and Organic Synthesis Research Laboratory; Department of Chemistry; Iran University of Science and Technology; Tehran 16846-13114 Iran
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94
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Mahato CK, Mukherjee S, Kundu M, Pramanik A. Pyrrolidine-Oxadiazolone Conjugates as Organocatalysts in Asymmetric Michael Reaction. J Org Chem 2019; 84:1053-1063. [PMID: 30577689 DOI: 10.1021/acs.joc.8b02393] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Pyrrolidine-oxadiazolone based organocatalysts are envisaged, synthesized, and utilized for asymmetric Michael reactions. Results of the investigations suggest that some of the catalysts are indeed efficient for stereoselective 1,4-conjugated Michael additions (dr: >97:3, ee up to 99%) in high chemical yields (up to 97%) often in short reaction time. As an extension, one enantiopure Michael adduct has been utilized to synthesize optically active octahydroindole.
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Affiliation(s)
- Chandan K Mahato
- TCG Lifesciences Pvt. Ltd. , BN-7 , Salt Lake City, Kolkata 700091 , India.,Department of Chemistry , University of Calcutta , 92, A. P. C. Road , Kolkata 700009 , India
| | - Sayan Mukherjee
- Department of Chemistry , University of Calcutta , 92, A. P. C. Road , Kolkata 700009 , India
| | - Mrinalkanti Kundu
- TCG Lifesciences Pvt. Ltd. , BN-7 , Salt Lake City, Kolkata 700091 , India
| | - Animesh Pramanik
- Department of Chemistry , University of Calcutta , 92, A. P. C. Road , Kolkata 700009 , India
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95
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Markad SB, Bhosale VA, Bokale SR, Waghmode SB. Stereoselective Approach towards the Synthesis of 3
R
, 5
S
Gingerdiol and 3
S
, 5
S
Gingerdiol. ChemistrySelect 2019. [DOI: 10.1002/slct.201803154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sachin B. Markad
- Department of ChemistrySavitribai Phule Pune University (Formerly University of Pune) Ganeshkhind, Pune 411007 India
| | - Viraj A. Bhosale
- Department of ChemistrySavitribai Phule Pune University (Formerly University of Pune) Ganeshkhind, Pune 411007 India
| | - Suvarna R. Bokale
- Department of ChemistrySavitribai Phule Pune University (Formerly University of Pune) Ganeshkhind, Pune 411007 India
| | - Suresh B. Waghmode
- Department of ChemistrySavitribai Phule Pune University (Formerly University of Pune) Ganeshkhind, Pune 411007 India
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96
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Chen K, Wu CD. Designed fabrication of biomimetic metal–organic frameworks for catalytic applications. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.01.016] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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97
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Heravi MM, Zadsirjan V, Masoumi B, Heydari M. Organometal-catalyzed asymmetric Friedel-Crafts reactions. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2018.10.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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98
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Bhaskararao B, Sunoj RB. Two chiral catalysts in action: insights into cooperativity and stereoselectivity in proline and cinchona-thiourea dual organocatalysis. Chem Sci 2018; 9:8738-8747. [PMID: 30627394 PMCID: PMC6289169 DOI: 10.1039/c8sc03078b] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 09/17/2018] [Indexed: 12/13/2022] Open
Abstract
Increasing use of two chiral catalysts in cooperative asymmetric catalysis in recent years raises some fundamental questions on chiral compatibility between the catalysts, modes of activation, and relative disposition of substrates within the chiral environment of the catalysts for effective asymmetric induction. We present molecular insights into a one-pot catalytic Michael reaction cascade between a dicarbonyl compound (7-oxo-7-phenylhept-5-enal) and nitrostyrene, catalyzed by two chiral organocatalysts (proline and cinchona-thiourea), leading to a densely functionalized tetra-substituted cyclohexane product. The density functional theory (SMD(toluene)/M06-2X/6-31G**) computations helped us identify the role of the organocatalytic catalytic dyad in providing a lower energy pathway. The covalent activation of the aldehydic end by (S)-proline results in an enamine, which then adds to the noncovalently activated nitrostyrene in the first Michael addition to give a nitronate anion. The configuration at two of the four chiral centers of the product gets fixed in this step whereas that of the remaining two is determined by intramolecular cyclization between the nitronate and the enone. Important mechanistic features such as (a) a lower energy pathway as compared to a proline-only route for the formation of the syn-enamine and its participation in the first Michael addition and (b) the origin of the preferred prochiral faces in the C-C bond formation are traced to the active involvement of the cinchona-thiourea catalyst in conjunction with proline in each step of the reaction. The true cooperative action by both the catalysts is identified as enabled by a network of hydrogen bonding, and π···π stacking between the aryl ring of the cinchona-thiourea catalyst as well as other noncovalent interactions between the catalysts themselves, and that between the catalysts and substrate.
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Affiliation(s)
- Bangaru Bhaskararao
- Department of Chemistry , Indian Institute of Technology Bombay , Powai , Mumbai 400076 , India .
| | - Raghavan B Sunoj
- Department of Chemistry , Indian Institute of Technology Bombay , Powai , Mumbai 400076 , India .
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99
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Maleki A, Firouzi-Haji R. L-Proline functionalized magnetic nanoparticles: A novel magnetically reusable nanocatalyst for one-pot synthesis of 2,4,6-triarylpyridines. Sci Rep 2018; 8:17303. [PMID: 30470821 PMCID: PMC6251865 DOI: 10.1038/s41598-018-35676-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 11/09/2018] [Indexed: 12/03/2022] Open
Abstract
In this work, an efficient method for the immobilization of L-proline on magnetic nanoparticles was offered and evaluated as a recoverable magnetic nanocatalyst for synthesis of 2,4,6-triarylpyridines through one-pot three-component reaction of acetophenone, aryl aldehydes and ammonium acetate. This article is the first report of the catalytic application of L-proline functionalized magnetic nanoparticles in organic reactions as a magnetic nanocatalyst. This novel magnetic nanocatalyst proved to be effective and provided the products in high to excellent yield under solvent-free conditions. The structure of obtained nanoparticles was characterized by Fourier transform infrared spectrophotometry (FT-IR), field-emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA) and energy-dispersive X-ray spectroscopy (EDX). TGA result revealed that it is stable up to 200 °C for using as a catalyst in organic reactions. FE-SEM image of the synthesized nanocatalyst showed that it has nearly core-shell spherical shape and uniform size distribution with an average size about 80 nm. Moreover, the catalyst could be easily recovered by facile separation by magnetic forces and recycled for several times without significant loss of its catalytic activity. The benefits of this study are simplicity, nontoxicity, low cost, simple workup, and an environmentally benign nature.
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Affiliation(s)
- Ali Maleki
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran.
| | - Razieh Firouzi-Haji
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
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100
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Cruz-Hernández C, Martínez-Martínez E, Hernández-González PE, Juaristi E. Synthesis of a New N-Diaminophosphoryl-N′-[(2S)-2-pyrrolidinylmethyl]thiourea as a Chiral Organocatalyst for the Stereoselective Michael Addition of Cyclohexanone to Nitrostyrenes and Chalcones - Application in Cascade Processes for the Synthesis of Polyc. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801339] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Carlos Cruz-Hernández
- Departamento de Química; Centro de Investigación y de Estudios Avanzados; Avenida IPN 2508 07360 Ciudad de México Mexico
| | - Eduardo Martínez-Martínez
- Departamento de Química; Centro de Investigación y de Estudios Avanzados; Avenida IPN 2508 07360 Ciudad de México Mexico
| | - Perla E. Hernández-González
- Departamento de Química; Centro de Investigación y de Estudios Avanzados; Avenida IPN 2508 07360 Ciudad de México Mexico
| | - Eusebio Juaristi
- Departamento de Química; Centro de Investigación y de Estudios Avanzados; Avenida IPN 2508 07360 Ciudad de México Mexico
- El Colegio Nacional; Luis González Obregón 23, Centro Histórico 06020 Ciudad de México Mexico
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