51
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Zhang L, Shi M, Wang F. Practical way for the synthesis of 4H-benzo[e][1,3]oxazine by anhydride-promoted [4+2] cyclization of in situ generated o-quinone methides with amides. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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52
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Fujieda N, Ichihashi H, Yuasa M, Nishikawa Y, Kurisu G, Itoh S. Cupin Variants as a Macromolecular Ligand Library for Stereoselective Michael Addition of Nitroalkanes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nobutaka Fujieda
- Department of Applied Life Sciences Graduate School of Life and Environmental Sciences Osaka Prefecture University 1-1 Gakuen-cho, Naka-ku, Sakai-shi Osaka 599-8531 Japan
| | - Haruna Ichihashi
- Department of Material and Life Science Graduate School of Engineering Osaka University 2-1 Yamada-oka, Suita Osaka 565-0871 Japan
| | - Miho Yuasa
- Department of Applied Life Sciences Graduate School of Life and Environmental Sciences Osaka Prefecture University 1-1 Gakuen-cho, Naka-ku, Sakai-shi Osaka 599-8531 Japan
| | - Yosuke Nishikawa
- Institute for Protein Research Osaka University 3-2 Yamada-oka, Suita Osaka 565-0871 Japan
| | - Genji Kurisu
- Institute for Protein Research Osaka University 3-2 Yamada-oka, Suita Osaka 565-0871 Japan
| | - Shinobu Itoh
- Department of Material and Life Science Graduate School of Engineering Osaka University 2-1 Yamada-oka, Suita Osaka 565-0871 Japan
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53
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Fujieda N, Ichihashi H, Yuasa M, Nishikawa Y, Kurisu G, Itoh S. Cupin Variants as a Macromolecular Ligand Library for Stereoselective Michael Addition of Nitroalkanes. Angew Chem Int Ed Engl 2020; 59:7717-7720. [PMID: 32073197 DOI: 10.1002/anie.202000129] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Indexed: 12/12/2022]
Abstract
Cupin superfamily proteins (TM1459) work as a macromolecular ligand framework with a double-stranded β-barrel structure ligating to a Cu ion through histidine side chains. Variegating the first coordination sphere of TM1459 revealed that H52A and H54A/H58A mutants effectively catalyzed the diastereo- and enantioselective Michael addition reaction of nitroalkanes to an α,β-unsaturated ketone. Moreover, calculated substrate docking signified C106N and F104W single-point mutations, which inverted the diastereoselectivity of H52A and further improved the stereoselectivity of H54A/H58A, respectively.
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Affiliation(s)
- Nobutaka Fujieda
- Department of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka, 599-8531, Japan
| | - Haruna Ichihashi
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Miho Yuasa
- Department of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka, 599-8531, Japan
| | - Yosuke Nishikawa
- Institute for Protein Research, Osaka University, 3-2 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Genji Kurisu
- Institute for Protein Research, Osaka University, 3-2 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Shinobu Itoh
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
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54
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Li J, Duan X, Tian Z, Zheng Y, Qi J. N‐Heterocyclic Carbene‐Catalyzed Activation of Ynals for the Construction of Functional Pyridines. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900693] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Jia‐Hui Li
- Key Laboratory of Chemical Biology of Hebei ProvinceCollege of Chemistry and Environmental ScienceHebei University Baoding 071002 Hebei Province People's Republic of China
| | - Xiao‐Yong Duan
- Key Laboratory of Chemical Biology of Hebei ProvinceCollege of Chemistry and Environmental ScienceHebei University Baoding 071002 Hebei Province People's Republic of China
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of EducationHebei University Baoding 071002 Hebei Province People's Republic of China
| | - Zhao‐Hui Tian
- Key Laboratory of Chemical Biology of Hebei ProvinceCollege of Chemistry and Environmental ScienceHebei University Baoding 071002 Hebei Province People's Republic of China
| | - Yi‐Fan Zheng
- Key Laboratory of Chemical Biology of Hebei ProvinceCollege of Chemistry and Environmental ScienceHebei University Baoding 071002 Hebei Province People's Republic of China
| | - Jing Qi
- Key Laboratory of Chemical Biology of Hebei ProvinceCollege of Chemistry and Environmental ScienceHebei University Baoding 071002 Hebei Province People's Republic of China
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of EducationHebei University Baoding 071002 Hebei Province People's Republic of China
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55
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Regenauer NI, Settele S, Bill E, Wadepohl H, Roşca DA. Bis(imino)pyrazine-Supported Iron Complexes: Ligand-Based Redox Chemistry, Dearomatization, and Reversible C-C Bond Formation. Inorg Chem 2020; 59:2604-2612. [PMID: 31990534 DOI: 10.1021/acs.inorgchem.9b03665] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Iron complexes supported by novel π-acidic bis(imino)pyrazine (PPzDI) ligands can be functionalized at the nonligated nitrogen atom, and this has a marked effect on the redox properties of the resulting complexes. Dearomatization is observed in the presence of cobaltocene, which reversibly reduces the pyrazine core and not the imine functionality, as observed in the case of the pyridinediimine-ligated iron analogues. The resulting ligand-based radical is prone to dimerization through the formation of a long carbon-carbon bond, which can be subsequently cleaved under mild oxidative conditions.
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Affiliation(s)
- Nicolas I Regenauer
- Anorganisch-Chemisches Institut , Universität Heidelberg , Im Neuenheimer Feld 276 , 69120 Heidelberg , Germany
| | - Simon Settele
- Anorganisch-Chemisches Institut , Universität Heidelberg , Im Neuenheimer Feld 276 , 69120 Heidelberg , Germany
| | - Eckhard Bill
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstraße 24-36 , 45470 Mülheim/Ruhr , Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut , Universität Heidelberg , Im Neuenheimer Feld 276 , 69120 Heidelberg , Germany
| | - Dragoş-Adrian Roşca
- Anorganisch-Chemisches Institut , Universität Heidelberg , Im Neuenheimer Feld 276 , 69120 Heidelberg , Germany
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56
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Saito A, Yoshioka S, Naruto M, Saito S. Catalytic Hydrogenation of N‐protected α‐Amino Acids Using Ruthenium Complexes with Monodentate Phosphine Ligands. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901298] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Akari Saito
- Department of Chemistry, Graduate School of ScienceNagoya University, Chikusa Nagoya 464-8602 Japan
| | - Shota Yoshioka
- Department of Chemistry, Graduate School of ScienceNagoya University, Chikusa Nagoya 464-8602 Japan
| | - Masayuki Naruto
- Department of Chemistry, Graduate School of ScienceNagoya University, Chikusa Nagoya 464-8602 Japan
| | - Susumu Saito
- Department of Chemistry, Graduate School of ScienceNagoya University, Chikusa Nagoya 464-8602 Japan
- Research Center for Materials ScienceNagoya University, Chikusa Nagoya 464-8602 Japan
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57
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Recent advances in the chemistry of group 9—Pincer organometallics. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2020. [DOI: 10.1016/bs.adomc.2019.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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58
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Zhao G, Canterbury DP, Taylor AP, Cheng X, Mikochik P, Bagley SW, Tong R. Synthesis of 2-Arylpiperidines via Pd-Catalyzed Arylation of Aza-Achmatowicz Rearrangement Products with Arylboronic Acids. Org Lett 2019; 22:458-463. [PMID: 31880455 DOI: 10.1021/acs.orglett.9b04220] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The first Pd-catalyzed arylation of aza-Achmatowicz rearrangement products with arylboronic acids is achieved, providing versatile 2-aryldihydropyridinones for facile synthesis of highly functionalized 2-arylpiperidines. Key to this arylation is the use of non-phosphine-ligand palladium precatalyst. The substrate scope is demonstrated with >26 examples, and the utility of 2-aryldihydropyridinones is illustrated by the synthesis of a small collection of 2-arylpiperidines with substituents or functional groups at any carbon (C2-C6) as well as two NK1 receptor antagonists (+)-CP-999,94 and (+)-L-733,060.
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Affiliation(s)
- Guodong Zhao
- Department of Chemistry , The Hong Kong University of Science and Technology , Clearwater Bay, Kowloon , Hong Kong, China
| | - Daniel P Canterbury
- Worldwide Research & Development, Groton Laboratories , Pfizer, Inc. , Groton , Connecticut 06340 , United States
| | - Alexandria P Taylor
- Worldwide Research & Development, Groton Laboratories , Pfizer, Inc. , Groton , Connecticut 06340 , United States
| | - Xiayun Cheng
- Worldwide Research & Development, Groton Laboratories , Pfizer, Inc. , Groton , Connecticut 06340 , United States
| | - Peter Mikochik
- Worldwide Research & Development, Groton Laboratories , Pfizer, Inc. , Groton , Connecticut 06340 , United States
| | - Scott W Bagley
- Worldwide Research & Development, Groton Laboratories , Pfizer, Inc. , Groton , Connecticut 06340 , United States
| | - Rongbiao Tong
- Department of Chemistry , The Hong Kong University of Science and Technology , Clearwater Bay, Kowloon , Hong Kong, China
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59
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Sim J, Viji M, Rhee J, Jo H, Cho SJ, Park Y, Seo S, Jung K, Lee H, Jung J. γ
‐Functionalization of
α,β
‐Unsaturated Nitriles under Mild Conditions: Versatile Synthesis of 4‐Aryl‐2‐Bromopyridines. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jaeuk Sim
- College of Pharmacy and Medicinal Research Center (MRC)Chungbuk National University Cheongju 28160 Republic of Korea
| | - Mayavan Viji
- College of Pharmacy and Medicinal Research Center (MRC)Chungbuk National University Cheongju 28160 Republic of Korea
| | - Jeongtae Rhee
- College of Pharmacy and Medicinal Research Center (MRC)Chungbuk National University Cheongju 28160 Republic of Korea
| | - Hyeju Jo
- College of Pharmacy and Medicinal Research Center (MRC)Chungbuk National University Cheongju 28160 Republic of Korea
| | - Suk Joon Cho
- College of Pharmacy and Medicinal Research Center (MRC)Chungbuk National University Cheongju 28160 Republic of Korea
- Bio & Drug Discovery DivisionKorea Research Institute of Chemical Technology Daejeon 34114 Republic of Korea
| | - Yunjeong Park
- College of Pharmacy and Medicinal Research Center (MRC)Chungbuk National University Cheongju 28160 Republic of Korea
| | - Seung‐Yong Seo
- College of Pharmacy and Gachon Institute of Pharmaceutical SciencesGachon University Incheon 21936 Republic of Korea
| | - Kwan‐Young Jung
- Bio & Drug Discovery DivisionKorea Research Institute of Chemical Technology Daejeon 34114 Republic of Korea
| | - Heesoon Lee
- College of Pharmacy and Medicinal Research Center (MRC)Chungbuk National University Cheongju 28160 Republic of Korea
| | - Jae‐Kyung Jung
- College of Pharmacy and Medicinal Research Center (MRC)Chungbuk National University Cheongju 28160 Republic of Korea
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60
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Cheng D, Deng Z, Yan X, Wang M, Xu X, Yan J. 2,3‐Dichloro‐5,6‐Dicyano‐1,4‐Benzoquinone (DDQ)‐Mediated Tandem Oxidative Coupling/Intramolecular Annulation/Dehydro‐Aromatization for the Synthesis of Polysubstituted and Fused Pyridines. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900956] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Dongping Cheng
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310014, People's Republic of China
| | - Zhiteng Deng
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310014, People's Republic of China
| | - Xianhang Yan
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310014, People's Republic of China
| | - Mingliang Wang
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310014, People's Republic of China
| | - Xiaoliang Xu
- College of Chemical EngineeringZhejiang University of Technology Hangzhou 310014, People's Republic of China
| | - Jizhong Yan
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310014, People's Republic of China
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61
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Reen GK, Kumar A, Sharma P. Recent advances on the transition-metal-catalyzed synthesis of imidazopyridines: an updated coverage. Beilstein J Org Chem 2019; 15:1612-1704. [PMID: 31435443 PMCID: PMC6664406 DOI: 10.3762/bjoc.15.165] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 06/28/2019] [Indexed: 12/21/2022] Open
Abstract
A comprehensive account of recent advances in the synthesis of imidazopyridines, assisted through transition-metal-catalyzed multicomponent reactions, C-H activation/functionalization and coupling reactions are highlighted in this review article. The basic illustration of this review comprises of schemes with concise account of explanatory text. The schemes depict the reaction conditions along with a quick look into the mechanism involved to render a deep understanding of the catalytic role. At some instances optimizations of certain features have been illustrated through tables, i.e., selectivity of catalyst, loading of the catalyst and percentage yield with different substrates. Each of the reported examples has been rigorously analyzed for reacting substrates, reaction conditions and transition metals used as the catalyst. This review will be helpful to the chemists in understanding the challenges associated with the reported methods as well as the future possibilities, both in the choice of substrates and catalysts. This review would be quite appealing to a wider range of organic chemists in academia and industrial R&D sectors working in the field of heterocyclic syntheses. In a nutshell, this review will be a guiding torch to envisage: (i) the role of various transition metals in the domain dedicated towards method development and (ii) for the modifications needed thereof in the R&D sector.
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Affiliation(s)
| | - Ashok Kumar
- School of Chemical Sciences, Devi Ahilya University, Indore, (M. P.), India
| | - Pratibha Sharma
- School of Chemical Sciences, Devi Ahilya University, Indore, (M. P.), India
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62
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Construction of optical active metallo-supramolecular polymers from enantiopure bis-pybox ligands. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.04.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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63
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Yang L, Zhang JY, Duan XH, Gao P, Jiao J, Guo LN. Copper-Catalyzed Cyanoalkylation of Amines via C–C Bond Cleavage: An Approach for C(sp3)–N Bond Formations. J Org Chem 2019; 84:8615-8629. [DOI: 10.1021/acs.joc.9b01084] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Lin Yang
- Department of Chemistry, School of Science, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University, Xi’an 710049, China
| | - Jia-Yu Zhang
- Department of Chemistry, School of Science, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University, Xi’an 710049, China
| | - Xin-Hua Duan
- Department of Chemistry, School of Science, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University, Xi’an 710049, China
| | - Pin Gao
- Department of Chemistry, School of Science, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University, Xi’an 710049, China
| | - Jiao Jiao
- Department of Chemistry, School of Science, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University, Xi’an 710049, China
| | - Li-Na Guo
- Department of Chemistry, School of Science, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University, Xi’an 710049, China
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64
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Harada S, Nishida A. Catalytic and Enantioselective Diels‐Alder Reaction of Siloxydienes. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900159] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shinji Harada
- Graduate School of Pharmaceutical SciencesChiba University 1-8-1 Inohana, Chuo-ku Chiba 260-8675 Japan
- Molecular Chirality Research CenterChiba University 1-33 Yayoi-cho, Inage-ku Chiba 263-8522 Japan
| | - Atsushi Nishida
- Graduate School of Pharmaceutical SciencesChiba University 1-8-1 Inohana, Chuo-ku Chiba 260-8675 Japan
- Molecular Chirality Research CenterChiba University 1-33 Yayoi-cho, Inage-ku Chiba 263-8522 Japan
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65
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Molecular-level design of Fe-N-C catalysts derived from Fe-dual pyridine coordination complexes for highly efficient oxygen reduction. J Catal 2019. [DOI: 10.1016/j.jcat.2019.03.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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66
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Fallek A, Portnoy M. The Use of Lewis Acids for Repairing Chemoselectivity of the Organocatalyzed Morita‐Baylis‐Hillman Reaction. ChemistrySelect 2019. [DOI: 10.1002/slct.201900157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Amit Fallek
- School of ChemistryRaymond and Beverly Sackler Faculty of Exact SciencesTel Aviv University Tel Aviv 699678 Israel
| | - Moshe Portnoy
- School of ChemistryRaymond and Beverly Sackler Faculty of Exact SciencesTel Aviv University Tel Aviv 699678 Israel
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67
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Nishiyama H. Complex, Catalysis, Return to Complex. J SYN ORG CHEM JPN 2019. [DOI: 10.5059/yukigoseikyokaishi.77.189] [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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68
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Gao WQ, Meng YS, Liu CH, Pan Y, Liu T, Zhu YY. Spin crossover and structural phase transition in homochiral and heterochiral Fe[(pybox)2]2+ complexes. Dalton Trans 2019; 48:6323-6327. [DOI: 10.1039/c8dt04893b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spin crossover and structural phase transition were discovered in three pairs of homochiral and heterochiral [Fe(pybox)2]2+ diastereomers.
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Affiliation(s)
- Wan-Qing Gao
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Yin-Shan Meng
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Chun-Hua Liu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Yao Pan
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Tao Liu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Yuan-Yuan Zhu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
- State Key Laboratory of Fine Chemicals
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69
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Deev SL, Khalymbadzha IA, Shestakova TS, Charushin VN, Chupakhin ON. 15N labeling and analysis of 13C–15N and 1H–15N couplings in studies of the structures and chemical transformations of nitrogen heterocycles. RSC Adv 2019; 9:26856-26879. [PMID: 35528595 PMCID: PMC9070671 DOI: 10.1039/c9ra04825a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 08/19/2019] [Indexed: 11/21/2022] Open
Abstract
This review provides a generalization of effective examples of 15N labeling followed by an analysis of JCN and JHN couplings in solution as a tool to study the structural aspects and pathways of chemical transformations in nitrogen heterocycles.
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Affiliation(s)
- Sergey L. Deev
- Ural Federal University
- 620002 Yekaterinburg
- Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis
- 620219 Yekaterinburg
| | | | | | - Valery N. Charushin
- Ural Federal University
- 620002 Yekaterinburg
- Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis
- 620219 Yekaterinburg
| | - Oleg N. Chupakhin
- Ural Federal University
- 620002 Yekaterinburg
- Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis
- 620219 Yekaterinburg
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70
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Alig L, Fritz M, Schneider S. First-Row Transition Metal (De)Hydrogenation Catalysis Based On Functional Pincer Ligands. Chem Rev 2018; 119:2681-2751. [PMID: 30596420 DOI: 10.1021/acs.chemrev.8b00555] [Citation(s) in RCA: 504] [Impact Index Per Article: 84.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The use of 3d metals in de/hydrogenation catalysis has emerged as a competitive field with respect to "traditional" precious metal catalyzed transformations. The introduction of functional pincer ligands that can store protons and/or electrons as expressed by metal-ligand cooperativity and ligand redox-activity strongly stimulated this development as a conceptual starting point for rational catalyst design. This review aims at providing a comprehensive picture of the utilization of functional pincer ligands in first-row transition metal hydrogenation and dehydrogenation catalysis and related synthetic concepts relying on these such as the hydrogen borrowing methodology. Particular emphasis is put on the implementation and relevance of cooperating and redox-active pincer ligands within the mechanistic scenarios.
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Affiliation(s)
- Lukas Alig
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstrasse 4 , D-37077 Göttingen , Germany
| | - Maximilian Fritz
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstrasse 4 , D-37077 Göttingen , Germany
| | - Sven Schneider
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstrasse 4 , D-37077 Göttingen , Germany
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71
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Gracia Retamosa M, Álvarez‐Casao Y, Matador E, Gómez Á, Monge D, Fernández R, Lassaletta JM. Pyridine‐Hydrazone Ligands in Asymmetric Palladium‐Catalyzed 1,4‐ and 1,6‐Additions of Arylboronic Acids to Cyclic (Di)enones. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- María Gracia Retamosa
- Instituto Investigaciones Químicas (CSIC-US) Américo Vespucio 49 41092 Sevilla Spain
| | - Yolanda Álvarez‐Casao
- Departamento de Química OrgánicaUniversidad de Sevilla, C/Prof. García González, 1 41012 Sevilla Spain
| | - Esteban Matador
- Departamento de Química OrgánicaUniversidad de Sevilla, C/Prof. García González, 1 41012 Sevilla Spain
| | - Ángela Gómez
- Departamento de Química OrgánicaUniversidad de Sevilla, C/Prof. García González, 1 41012 Sevilla Spain
| | - David Monge
- Departamento de Química OrgánicaUniversidad de Sevilla, C/Prof. García González, 1 41012 Sevilla Spain
| | - Rosario Fernández
- Departamento de Química OrgánicaUniversidad de Sevilla, C/Prof. García González, 1 41012 Sevilla Spain
| | - José M. Lassaletta
- Instituto Investigaciones Químicas (CSIC-US) Américo Vespucio 49 41092 Sevilla Spain
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72
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Wang B, Wang Y, Jiang Y, Chu M, Qi S, Ju W, Xu D. Asymmetric fluorination of indanone-2-carboxylates using a polystyrene-supported diphenylamine-linked bis(oxazoline) complex. Org Biomol Chem 2018; 16:7702-7710. [PMID: 30288521 DOI: 10.1039/c8ob01943f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly enantioselective fluorination of indanone-2-carboxylates catalyzed by a polystyrene-supported diphenylamine-linked bis(oxazoline) (PS-box)-Cu(OTf)2 complex has been developed in a continuous flow system. The supported complex exhibited extremely efficient catalytic performance with high activity, affording the corresponding products in excellent yields (up to 99% yield) with excellent enantioselectivities (up to 99% ee) and more than 4000 turnover number (TON).
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Affiliation(s)
- Biao Wang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Yifeng Wang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Yidong Jiang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Mingming Chu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Suosuo Qi
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Wanzhen Ju
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Danqian Xu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
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73
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Lavanya M, Asharani IV, Thirumalai D. One pot multi-component synthesis of functionalized spiropyridine and pyrido[2,3-d]pyrimidine scaffolds and their potent in-vitro anti-inflammatory and anti-oxidant investigations. Chem Biol Drug Des 2018; 93:464-472. [PMID: 30393996 DOI: 10.1111/cbdd.13434] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 10/07/2018] [Accepted: 10/18/2018] [Indexed: 12/12/2022]
Abstract
A new series of functionalized fused pyridines 4(a-i) and fused pyrido[2,3-d]pyrimidines 8(a-c) were designed and synthesized through a multi-component reaction where in pyridine ring formation step plays a key role. All the newly formed compounds were well characterized by spectral techniques such as FTIR, 1 HNMR, 13 CNMR, HRMS and XRD. The potential therapeutic activities such as anti-inflammatory activity by protein denaturation and RBC membrane stabilization methods, and anti-oxidant activity by DPPH scavenging method of the newly synthesized compounds were studied. Interestingly, in-vitro testing of these compounds reveals that the compounds 4d, 4g, 4i, 8a and 8b showed comparable anti-inflammatory activity with respect to the standard drug, diclofenac. Similarly, fused pyridine 4f showed excellent anti-oxidant activity when compared with the standard, ascorbic acid.
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Affiliation(s)
- Mallu Lavanya
- Department of Chemistry, School of Advanced Sciences, VIT, Vellore, Tamil Nadu, India
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74
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Viana H, Marques CS, Correia CA, Gilmore K, Galvão L, Vieira L, Seeberger PH, Burke AJ. Novel Palladium-Catalyzed Intramolecular Addition of Aryl Bromides to Aldehydes as Key to the Synthesis of 3,3-Dimethylchroman-4-ones and 3,3-Dimethylchroman-4-ols. ChemistrySelect 2018. [DOI: 10.1002/slct.201802889] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hugo Viana
- Department of Chemistry; School of Science and Technology, University of Évora, Rua Romão Ramalho 59; 7000-671 Évora Portugal
| | - Carolina S. Marques
- Centro de Química de Évora; University of Évora, Institute for Research and Advanced Studies, Rua Romão Ramalho, 59; 7000 Évora Portugal
| | - Camille A. Correia
- Max Planck Institute of Colloids and Interfaces Am Muehlenberg 1; 14476 Potsdam Germany
| | - Kerry Gilmore
- Max Planck Institute of Colloids and Interfaces Am Muehlenberg 1; 14476 Potsdam Germany
| | - Luís Galvão
- Department of Chemistry; School of Science and Technology, University of Évora, Rua Romão Ramalho 59; 7000-671 Évora Portugal
| | - Letícia Vieira
- Department of Chemistry; School of Science and Technology, University of Évora, Rua Romão Ramalho 59; 7000-671 Évora Portugal
| | - Peter H. Seeberger
- Max Planck Institute of Colloids and Interfaces Am Muehlenberg 1; 14476 Potsdam Germany
- Institute of Chemistry and Biochemistry; Freie Universitat Berlin Arnimallee 22; 14195 Berlin Germany
| | - Anthony J. Burke
- Department of Chemistry; School of Science and Technology, University of Évora, Rua Romão Ramalho 59; 7000-671 Évora Portugal
- Centro de Química de Évora; University of Évora, Institute for Research and Advanced Studies, Rua Romão Ramalho, 59; 7000 Évora Portugal
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75
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Ma JW, Wang Q, Wang XG, Liang YM. Palladium-Catalyzed Cascade Difluoroalkylation/Cyclization of N-Propargylamides: Synthesis of Oxazoles and Oxazolines. J Org Chem 2018; 83:13296-13307. [DOI: 10.1021/acs.joc.8b02111] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jun-Wei Ma
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Qiang Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xin-Gang Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
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76
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Wang JY, Li MW, Li MF, Hao WJ, Li G, Tu SJ, Jiang B. N-Sulfonyl Bisimidazoline Ligands and Their Applications in Pd(II)-Catalyzed Asymmetric Addition toward α-Tertiary Amines. Org Lett 2018; 20:6616-6621. [PMID: 30215527 DOI: 10.1021/acs.orglett.8b02374] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A new class of chiral N-sulfonyl bisimidazoline (Bim) ligands have been designed, prepared, and applied in Pd(II)-catalyzed asymmetric addition of arylboronic acids to isatin-derived N-Boc ketimines. The combination of Pd(OCOCF3)2 and N-tosyl Bim ligand shows high catalytic activity and excellent asymmetric induction, enabling asymmetric addition to offer α-tertiary amines with generally good to high yields and excellent enantioselectivity (up to 96% yield, 96% ee). This asymmetric Pd(II) catalysis can tolerate air conditions, providing a practical and operationally simple protocol toward the construction of an enantioenriched α-tertiary stereocenter.
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Affiliation(s)
- Jia-Yin Wang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials , Jiangsu Normal University , Xuzhou 221116 , P. R. China
| | - Meng-Wei Li
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials , Jiangsu Normal University , Xuzhou 221116 , P. R. China
| | - Meng-Fan Li
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials , Jiangsu Normal University , Xuzhou 221116 , P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials , Jiangsu Normal University , Xuzhou 221116 , P. R. China
| | - Guigen Li
- Institute of Chemistry & BioMedical Sciences, Collaborative Innovation Center of Chemistry for Life Sciences , Nanjing University , Nanjing 210093 , P. R. China.,Department of Chemistry and Biochemistry , Texas Tech University , Lubbock , Texas 79409-1061 , United States
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials , Jiangsu Normal University , Xuzhou 221116 , P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials , Jiangsu Normal University , Xuzhou 221116 , P. R. China
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77
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Maity A, Sil A, Patra SK. Ruthenium(II) Complexes of 4′-(Aryl)-2,2′:6′,2′′-terpyridyl Ligands as Simple Catalysts for the Transfer Hydrogenation of Ketones. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800585] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Apurba Maity
- Department of Chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur India
| | - Amit Sil
- Department of Chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur India
| | - Sanjib K. Patra
- Department of Chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur India
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78
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Jia F, Yin C, Zeng Y, Sun R, Ge YC, Xu D, Li R, Chen H, Zhang C, Fu H. Mechanism of Direct C–H Arylation of Pyridine via a Transient Activator Strategy: A Combined Computational and Experimental Study. J Org Chem 2018; 83:10389-10397. [DOI: 10.1021/acs.joc.8b01480] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Feiyun Jia
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
- School of Basic Medical Sciences, North Sichuan Medical College, Nanchong, Sichuan 637007, P. R. China
| | - Changzhen Yin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Yang Zeng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Rui Sun
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Yi-Cen Ge
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | | | - Ruixiang Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Hua Chen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Chunchun Zhang
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Haiyan Fu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
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79
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Burrows KE, Kulmaczewski R, Cespedes O, Barrett SA, Halcrow MA. The speciation of homochiral and heterochiral diastereomers of homoleptic cobalt(II) and zinc(II) PyBox complexes. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.04.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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80
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Zhang S, Li Y, Xu Y, Wang Z. Recent progress in copper catalyzed asymmetric Henry reaction. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2017.10.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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81
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Babu SA, Krishnan KK, Ujwaldev SM, Anilkumar G. Applications of Pybox Complexes in Asymmetric Catalysis. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800094] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Sheba Ann Babu
- School of Chemical Sciences; Mahatma Gandhi University, Priyadarsini Hills; Kottayam Kerala 686560 India
| | - K. Keerthi Krishnan
- School of Chemical Sciences; Mahatma Gandhi University, Priyadarsini Hills; Kottayam Kerala 686560 India
| | - S. M. Ujwaldev
- School of Chemical Sciences; Mahatma Gandhi University, Priyadarsini Hills; Kottayam Kerala 686560 India
| | - Gopinathan Anilkumar
- School of Chemical Sciences; Mahatma Gandhi University, Priyadarsini Hills; Kottayam Kerala 686560 India
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82
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Tsuchida K, Yuki M, Nakajima K, Nishibayashi Y. Copper- and Borinic Acid-catalyzed Propargylic Etherification of Propargylic Carbonates with Benzyl Alcohols. CHEM LETT 2018. [DOI: 10.1246/cl.180123] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Kohei Tsuchida
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Masahiro Yuki
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazunari Nakajima
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yoshiaki Nishibayashi
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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83
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Sun W, Gu H, Lin X. Synthesis and Application of Hexamethyl-1,1′-spirobiindane-Based Phosphine-Oxazoline Ligands in Ni-Catalyzed Asymmetric Arylation of Cyclic Aldimines. J Org Chem 2018; 83:4034-4043. [DOI: 10.1021/acs.joc.8b00422] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Weiye Sun
- Laboratory of Asymmetric Catalysis and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou 310027, PR China
| | - Haorui Gu
- Laboratory of Asymmetric Catalysis and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou 310027, PR China
| | - Xufeng Lin
- Laboratory of Asymmetric Catalysis and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou 310027, PR China
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84
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Heidebrecht J, Gendy C, Gelfand BS, Roesler R. Water-soluble NNN-pincer complexes of cobalt, nickel and palladium: Solid-state structures and catalytic activity. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.09.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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85
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Brittain WDG, Cobb SL. Negishi cross-couplings in the synthesis of amino acids. Org Biomol Chem 2018; 16:10-20. [PMID: 29199315 DOI: 10.1039/c7ob02682j] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The Negishi cross-coupling is a powerful C-C bond-forming reaction widely utilised in many areas of organic synthesis. This review details the use of Negishi cross-couplings in the synthesis of unnatural amino acids. The application of this reaction in the preparation of aromatic, heteroaromatic, and, complex amino acid derivatives are reviewed and presented herein.
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Affiliation(s)
| | - Steven L Cobb
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK.
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86
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Desimoni G, Faita G, Quadrelli P. Forty Years after “Heterodiene Syntheses with α,β-Unsaturated Carbonyl Compounds”: Enantioselective Syntheses of 3,4-Dihydropyran Derivatives. Chem Rev 2018; 118:2080-2248. [DOI: 10.1021/acs.chemrev.7b00322] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Giovanni Desimoni
- Department of Chemistry, University of Pavia, Viale Taramelli 10, 27100 Pavia, Italy
| | - Giuseppe Faita
- Department of Chemistry, University of Pavia, Viale Taramelli 10, 27100 Pavia, Italy
| | - Paolo Quadrelli
- Department of Chemistry, University of Pavia, Viale Taramelli 10, 27100 Pavia, Italy
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87
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Martínez-Pardo P, Blay G, Muñoz MC, Pedro JR, Sanz-Marco A, Vila C. Enantioselective synthesis of chiral oxazolines from unactivated ketones and isocyanoacetate esters by synergistic silver/organocatalysis. Chem Commun (Camb) 2018; 54:2862-2865. [DOI: 10.1039/c8cc00856f] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synergistic catalysis by Ag+ and bifunctional squaramide allows the highly diastereo- and enantioselective reaction of isocyanoacetate esters and ketones to give chiral oxazolines bearing a quaternary stereocenter.
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Affiliation(s)
- Pablo Martínez-Pardo
- Departament de Química Orgànica
- Facultat de Química, Universitat de València
- València
- Spain
| | - Gonzalo Blay
- Departament de Química Orgànica
- Facultat de Química, Universitat de València
- València
- Spain
| | - M. Carmen Muñoz
- Departament de Física Aplicada
- Universitat Politècnica de València
- 46022-València
- Spain
| | - José R. Pedro
- Departament de Química Orgànica
- Facultat de Química, Universitat de València
- València
- Spain
| | - Amparo Sanz-Marco
- Departament de Química Orgànica
- Facultat de Química, Universitat de València
- València
- Spain
| | - Carlos Vila
- Departament de Química Orgànica
- Facultat de Química, Universitat de València
- València
- Spain
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88
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Abstract
The first enantioselective addition of nitroalkanes to imines (nitro-Mannich reaction), mediated by an iron(II) catalyst assembled by a hindered hydroxyethyl-pybox ligand, is described. This valuable carbon-carbon bond-forming reaction proceeds smoothly at room temperature to afford enantioenriched β-nitro amines in good yields and high enantioselectivity, up to 98% with unprecedentedly low iron catalyst loading (5 mol %).
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Affiliation(s)
| | - Jacek Mlynarski
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland.,Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, 01-224 Warsaw, Poland
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89
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Pybox-Iron(II) Spin-Crossover Complexes with Substituent Effects from the 4-Position of the Pyridine Ring (Pybox = 2,6-Bis(oxazolin-2-yl)pyridine). INORGANICS 2017. [DOI: 10.3390/inorganics5030052] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Spin-crossover (SCO) behavior of a series of [Fe(X-pybox)2](ClO4)2 was investigated, where X-pybox stands for 4-X-substituted 2,6-bis(oxazolin-2-yl)pyridine with X = H, Cl, Ph, CH3O, and CH3S. We confirmed that the mother compound [Fe(H-pybox)2](ClO4)2 underwent SCO above room temperature. After X was introduced, the SCO temperatures (T1/2) were modulated as 310, 230, and 330 K for X = Cl, Ph, and CH3S, respectively. The CH3O derivative possessed the high-spin state down to 2 K. Crystallographic analysis for X = H, Cl, CH3O, and CH3S was successful, being consistent with the results of the magnetic study. Distorted coordination structures stabilize the HS (high-spin) state, and the highest degree of the coordination structure distortion is found in the CH3O derivative. A plot of T1/2 against the Hammett substituent constant σp showed a positive relation. Solution susceptometry was also performed to remove intermolecular interaction and rigid crystal lattice effects, and the T1/2’s were determined as 260, 270, 240, 170, and 210 K for X = H, Cl, Ph, CH3O, and CH3S, respectively, in acetone. The substituent effect on T1/2 became very distinct, and it is clarified that electron-donating groups stabilize the HS state.
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90
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Burrows KE, McGrath SE, Kulmaczewski R, Cespedes O, Barrett SA, Halcrow MA. Spin States of Homochiral and Heterochiral Isomers of [Fe(PyBox) 2 ] 2+ Derivatives. Chemistry 2017; 23:9067-9075. [PMID: 28387453 DOI: 10.1002/chem.201700820] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Indexed: 11/08/2022]
Abstract
The following iron(II) complexes of 2,6-bis(oxazolinyl)pyridine (PyBox; LH ) derivatives are reported: [Fe(LH )2 ][ClO4 ]2 (1); [Fe((R)-LMe )2 ][ClO4 ]2 ((R)-2; LMe =2,6-bis{4-methyloxazolinyl}pyridine); [Fe((R)-LPh )2 ][ClO4 ]2 ((R)-3) and [Fe((R)-LPh )((S)-LPh )][ClO4 ]2 ((RS)-3; LPh =2,6-bis{4-phenyloxazolinyl}pyridine); and [Fe((R)-LiPr )2 ][ClO4 ]2 ((R)-4) and [Fe((R)-LiPr )((S)-LiPr )][ClO4 ]2 ((RS)-4; LiPr =2,6-bis{4-isopropyloxazolinyl}pyridine). Solid (R)-3⋅MeNO2 exhibits an unusual very gradual, but discontinuous thermal spin-crossover with an approximate T1/2 of 350 K. The discontinuity around 240 K lies well below T1/2 , and is unconnected to a crystallographic phase change occurring at 170 K. Rather, it can be correlated with a gradual ordering of the ligand conformation as the temperature is raised. The other solid compounds either exhibit spin-crossover above room temperature (1 and (RS)-3), or remain high-spin between 5-300 K [(R)-2, (R)-4 and (RS)-4]. Homochiral (R)-3 and (R)-4 exhibit more twisted ligand conformations and coordination geometries than their heterochiral isomers, which can be attributed to steric clashes between ligand substituents [(R)-3]; or, between the isopropyl substituents of one ligand and the backbone of the other ((R)-4). In solution, (RS)-3 retains its structural integrity but (RS)-4 undergoes significant racemization through ligand redistribution by 1 H NMR. (R)-4 and (RS)-4 remain high-spin in solution, whereas the other compounds all undergo spin-crossover equilibria. Importantly, T1/2 for (R)-3 (244 K) is 34 K lower than for (RS)-3 (278 K) in CD3 CN, which is the first demonstration of chiral discrimination between metal ion spin states in a molecular complex.
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Affiliation(s)
- Kay E Burrows
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Sarah E McGrath
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Rafal Kulmaczewski
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Oscar Cespedes
- School of Physics and Astronomy, University of Leeds, E. C. Stoner Building, Leeds, LS2 9JT, UK
| | - Simon A Barrett
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Malcolm A Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
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91
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Zhou S, Tong R. Three-Step Catalytic Asymmetric Total Syntheses of 13-Methyltetrahydroprotoberberine Alkaloids. Org Lett 2017; 19:1594-1597. [DOI: 10.1021/acs.orglett.7b00414] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Shiqiang Zhou
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Rongbiao Tong
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
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92
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Wenz J, Kochan A, Wadepohl H, Gade LH. A Readily Accessible Chiral NNN Pincer Ligand with a Pyrrole Backbone and Its Ni(II) Chemistry: Syntheses, Structural Chemistry, and Bond Activations. Inorg Chem 2017; 56:3631-3643. [DOI: 10.1021/acs.inorgchem.7b00077] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jan Wenz
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Alexander Kochan
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Lutz H. Gade
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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93
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Ošeka M, Kimm M, Järving I, Lippur K, Kanger T. Two Catalytic Methods of an Asymmetric Wittig [2,3]-Rearrangement. J Org Chem 2017; 82:2889-2897. [PMID: 28225271 DOI: 10.1021/acs.joc.6b02786] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two different approaches for asymmetric catalytic Wittig [2,3]-rearrangement were developed. Allyloxymalonate derivatives were converted into homoallyl alcohols via organocatalytic or Ca2+-catalyzed pathways in moderate to high enantioselectivities.
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Affiliation(s)
- Maksim Ošeka
- Department of Chemistry, Tallinn University of Technology , Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Mariliis Kimm
- Department of Chemistry, Tallinn University of Technology , Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Ivar Järving
- Department of Chemistry, Tallinn University of Technology , Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Kristin Lippur
- Department of Chemistry, Tallinn University of Technology , Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Tõnis Kanger
- Department of Chemistry, Tallinn University of Technology , Akadeemia tee 15, 12618 Tallinn, Estonia
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94
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Noda H, Amemiya F, Weidner K, Kumagai N, Shibasaki M. Catalytic asymmetric synthesis of CF 3-substituted tertiary propargylic alcohols via direct aldol reaction of α-N 3 amide. Chem Sci 2017; 8:3260-3269. [PMID: 28553529 PMCID: PMC5424470 DOI: 10.1039/c7sc00330g] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 02/21/2017] [Indexed: 12/28/2022] Open
Abstract
Organofluorine compounds are found in several important classes of chemicals, such as pharmaceuticals, agrochemicals, and functional materials. Chemists have been immensely interested in the development of methodologies for expeditious access to fluorine containing building blocks. In this study, we report a new method for the catalytic asymmetric synthesis of CF3-substituted tertiary propargylic alcohols with two contiguous stereogenic centers via the direct aldol reaction of an α-N3 amide to trifluoromethyl ketones. The key to the success of this method is the identification of a catalyst comprising Cu(ii)/chiral hydroxamic acid to promote the desired aldol reaction, constructing a tetrasubstituted carbon in a highly stereoselective fashion. Despite substantial prior advances in asymmetric catalysis, this class of catalysts has not been utilized for the formation of carbon-carbon bond-forming reactions. Our mechanistic study sheds light on the unique profile of this catalytic system, where the Cu(ii) complex plays a bifunctional role of serving as a Lewis acid and a Brønsted base. Furthermore, the densely functionalized aldol adducts undergo chemoselective transformations, affording a series of fluorine containing chiral building blocks with widespread application.
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Affiliation(s)
- Hidetoshi Noda
- Institute of Microbial Chemistry (BIKAKEN) , 3-14-23 Kamiosaki, Shinagawa-ku , Tokyo 141-0021 , Japan . ;
| | - Fuyuki Amemiya
- Institute of Microbial Chemistry (BIKAKEN) , 3-14-23 Kamiosaki, Shinagawa-ku , Tokyo 141-0021 , Japan . ;
| | - Karin Weidner
- Institute of Microbial Chemistry (BIKAKEN) , 3-14-23 Kamiosaki, Shinagawa-ku , Tokyo 141-0021 , Japan . ;
| | - Naoya Kumagai
- Institute of Microbial Chemistry (BIKAKEN) , 3-14-23 Kamiosaki, Shinagawa-ku , Tokyo 141-0021 , Japan . ;
| | - Masakatsu Shibasaki
- Institute of Microbial Chemistry (BIKAKEN) , 3-14-23 Kamiosaki, Shinagawa-ku , Tokyo 141-0021 , Japan . ;
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95
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Desyatkin VG, Anokhin MV, Rodionov VO, Beletskaya IP. Polystyrene-supported cu(II)-R-Box as recyclable catalyst in asymmetric Friedel–Crafts reaction. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2017. [DOI: 10.1134/s1070428016120010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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96
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Sayama S. Oxidative Syntheses and Ring Opening of Oxazolines and Related Compounds by Ammonium Tribromide. HETEROCYCLES 2017. [DOI: 10.3987/rev-17-866] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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97
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Ding ZY, Meng YS, Xiao Y, Zhang YQ, Zhu YY, Gao S. Probing the influence of molecular symmetry on the magnetic anisotropy of octahedral cobalt(ii) complexes. Inorg Chem Front 2017. [DOI: 10.1039/c7qi00547d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A series of field-induced cobalt(ii) SIMs exhibit varying axial zero-field splitting parameter D values from positive to negative with the increased distortion of the octahedral geometry.
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Affiliation(s)
- Zhong-Yu Ding
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Yin-Shan Meng
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Yi Xiao
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Yuan-Yuan Zhu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
- State Key Laboratory of Fine Chemicals
| | - Song Gao
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
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98
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Cabrero-Antonino M, Ballesteros-Garrido R, Chiassai L, Escrivà E, Ramirez de Arellano C, Ballesteros R, Abarca B. Synthesis of new terpyridine-like ligands based on triazolopyridines and benzotriazoles. NEW J CHEM 2017. [DOI: 10.1039/c7nj00962c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Herein, terpyridine triazole-based analogs bearing benzotriazoles or/and triazolopyridines are prepared via copper catalysis, where the arrangement of the nitrogen atoms is proven to be crucial to the spectroscopic properties of these ligands.
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Affiliation(s)
- M. Cabrero-Antonino
- Universitat de Valencia
- Facultat de Farmacia Dpto Química Organica
- 46100 Burjassot
- Spain
| | - R. Ballesteros-Garrido
- Universitat de Valencia
- Facultat de Farmacia Dpto Química Organica
- 46100 Burjassot
- Spain
- ICMol
| | - L. Chiassai
- Universitat de Valencia
- Facultat de Farmacia Dpto Química Organica
- 46100 Burjassot
- Spain
| | - E. Escrivà
- Universitat de Valencia
- Facultat de Farmacia Dpto Química Inorganica
- 46100 Burjassot
- Spain
| | - C. Ramirez de Arellano
- Universitat de Valencia
- Facultat de Farmacia Dpto Química Organica
- 46100 Burjassot
- Spain
- Centro de Innovación en Química Avanzada (ORFEO−CINQA)
| | - R. Ballesteros
- Universitat de Valencia
- Facultat de Farmacia Dpto Química Organica
- 46100 Burjassot
- Spain
| | - B. Abarca
- Universitat de Valencia
- Facultat de Farmacia Dpto Química Organica
- 46100 Burjassot
- Spain
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99
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Sayama S. Conversion of Oxazolines to Cyanomethyl Esters with Pyridinium Hydrobromide Perbromide in Water1. HETEROCYCLES 2017. [DOI: 10.3987/com-17-13684] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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100
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Poly(ethylene glycol)-supported chiral pyridine-2,6-bis(oxazoline): synthesis and application as a recyclable ligand in Cui-catalyzed enantioselective direct addition of terminal alkynes to imines. MENDELEEV COMMUNICATIONS 2016. [DOI: 10.1016/j.mencom.2016.11.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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