1
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Montagnon C, Bultel JR, Besnard C, Guénée L, Lacour J. Polycyclic Pyrazolidines by Tandem Diazomalonate Dipolar Cycloadditions and CpRu-Catalyzed Carbene Additions. Chemistry 2024; 30:e202401522. [PMID: 38726887 DOI: 10.1002/chem.202401522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Indexed: 07/12/2024]
Abstract
Thanks to the ability of diazo derivatives to react either as 1,3-dipoles and as carbenes after dinitrogen extrusion, combinations of oxa or aza benzonorbornadienes and diazomalonates afford polycyclic pyrazolidines via a three-step sequence of (i) a highly diastereoselective [3+2]-cycloaddition, (ii) a CpRu-catalyzed carbene addition, and (iii) a second dipolar cycloaddition. Of importance, step (II) represents a unique access to novel bench-stable N,N-cyclic azomethine imines, which behave as effective 1,3-dipoles in combination with electron-poor dipolarophiles. Each step proceeds efficiently and the 3-step process can be performed in one-pot to yield a polycyclic pyrazolidine in excellent overall yield (90 %).
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Affiliation(s)
- Claire Montagnon
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
| | - Joël R Bultel
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
| | - Céline Besnard
- Laboratoire de Cristallographie, University of Geneva, Quai Ernest Ansermet 24, 1211, Geneva 4, Switzerland
| | - Laure Guénée
- Laboratoire de Cristallographie, University of Geneva, Quai Ernest Ansermet 24, 1211, Geneva 4, Switzerland
| | - Jérôme Lacour
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
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2
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Guo W, Huang J, Ishihara K. Chiral π-Cu(ii)-catalyzed site-, exo/ endo-, and enantioselective dearomative (3 + 2) cycloadditions of isoquinolinium ylides with enamides, dienamides, and a trienamide. Chem Sci 2024; 15:10926-10934. [PMID: 39027307 PMCID: PMC11253176 DOI: 10.1039/d4sc02946a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Accepted: 06/05/2024] [Indexed: 07/20/2024] Open
Abstract
Here, we report a highly effective dearomative (3 + 2) cycloaddition reaction between isoquinolinium ylides and α,β-enamides, α,β-γ,δ-dienamides, or an α,β-γ,δ-ε,ζ-trienamide, which is catalyzed by a chiral π-Cu(ii) complex (1-10 mol%) and proceeds in a site-selective, exo/endo-selective, and enantioselective manner. The (3 + 2) cycloaddition involving the α,β-enamides proceeds with high exo-selectivity and enantioselectivity. This method is applicable to various substrates including α-substituted, α,β-disubstituted, or β,β-disubstituted α,β-enamides, which are compounds with an intrinsically low reactivity. This method provides synthetic access to pyrroloisoquinoline derivatives with up to three chiral carbon centers, including those featuring fluorine and trifluoromethyl groups, as well as quaternary carbon centers. The (3 + 2) cycloaddition involving α,β-γ,δ-dienamides proceeds with high γ,δ-site-selectivity and enantioselectivity, whereby the exo/endo-selectivity depends on the substrates and ligands. Remarkably, the (3 + 2) cycloaddition of δ-phenyl-α,β-γ,δ-dienamide proceeds with high α,β-site-selectivity, exo-selectivity, and enantioselectivity. In a manner similar to the reaction with the α,β-γ,δ-dienamides, α,β-γ,δ-ε,ζ-trienamide furnishes a (3 + 2) cycloadduct with good ε,ζ-site-selectivity, endo-selectivity, and enantioselectivity.
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Affiliation(s)
- Weiwei Guo
- Graduate School of Engineering, Nagoya University B2-3(611), Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Jianhao Huang
- Graduate School of Engineering, Nagoya University B2-3(611), Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University B2-3(611), Furo-cho, Chikusa Nagoya 464-8603 Japan
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3
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Ao Y, Ma H, Gan B, Wang W, Zhang J, Zhou W, Zhang X, Cai Q. Copper-Catalyzed Asymmetric Kinugasa/Michael Addition Cascade Reactions for the Synthesis of Chiral Spiro β-Lactams. Org Lett 2024. [PMID: 38809099 DOI: 10.1021/acs.orglett.4c01568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
A mild copper-catalyzed asymmetric Kinugasa/Michael addition cascade process is developed. The reaction of α, β-unsaturated ester-tethered propiolamides with nitrones provides an efficient protocol for the construction of functionalized chiral 2,6-diazaspiro[3.4]octane-1,5-dione products in satisfactory yields and with high enantio- and diastereoselectivities.
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Affiliation(s)
- Yunlin Ao
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou, 510632, P. R. China
| | - Haowen Ma
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou, 510632, P. R. China
| | - Binghan Gan
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou, 510632, P. R. China
| | - Wenjing Wang
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou, 510632, P. R. China
| | - Jiehao Zhang
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou, 510632, P. R. China
| | - Wei Zhou
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou, 510632, P. R. China
| | - Xiaoqi Zhang
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou, 510632, P. R. China
| | - Qian Cai
- College of Pharmacy, Jinan University, No. 601 Huangpu Avenue West, Guangzhou, 510632, P. R. China
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4
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He F, Sun Z, Xu Y, Yu J, Li W, Miao H, Wu C. Photoinduced [3+2] Cycloaddition of Alkyl-Acceptor Diazoalkanes: Diversity-Oriented Synthesis of Pyrazolines Containing a Quaternary Center. Org Lett 2024; 26:4031-4036. [PMID: 38277125 DOI: 10.1021/acs.orglett.3c04296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
We present a new [3+2] cycloaddition reaction between alkyl-acceptor diazoalkanes under visible light irradiation. By employing easily accessible alkyl-acceptor-type diazoalkanes or their precursor hydrazones as both 1,3-dipoles and dipolarophiles, a diverse range of pyrazoline derivatives featuring a quaternary center have been efficiently synthesized in a predictable manner, with excellent functional group tolerance and good yields. Furthermore, scale-up experiments and downstream transformations of the product were also detailed.
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Affiliation(s)
- Fengya He
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Ziyi Sun
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Yiwei Xu
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Jingwen Yu
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Wenyong Li
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
| | - Hui Miao
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
| | - Chenggui Wu
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
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5
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Guo W, Hori M, Ogura Y, Nishimura K, Oki K, Ikai T, Yashima E, Ishihara K. Tandem Isomerization/α,β-Site-Selective and Enantioselective Addition Reactions of N-(3-Butynoyl)-3,5-dimethylpyrazole Induced by Chiral π-Cu(II) Catalysts. J Am Chem Soc 2023; 145:27080-27088. [PMID: 38032102 PMCID: PMC10722507 DOI: 10.1021/jacs.3c10820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 12/01/2023]
Abstract
Allenes are important building blocks, and derivatization of products via cycloadditions of allenes could become a powerful strategy for constructing carbocyclic and heterocyclic rings. However, the development of catalytic site-selective and enantioselective cycloaddition reactions of allenes still presents significant challenges. Here, we report chiral π-Cu(II)-complex-catalyzed isomerization of N-(3-butynoyl)-3,5-dimethyl-1H-pyrazole to generate N-allenoylpyrazole in situ and subsequent α,β-site-selective and enantioselective [3 + 2], [4 + 2], or [2 + 2] cycloaddition or conjugate addition reactions. The asymmetric environment created by the intramolecular π-Cu(II) interactions provides the corresponding adducts in moderate to high yield with excellent enantioselectivity. To the best of our knowledge, this is the first successful method for chiral-Lewis-acid-catalyzed tandem isomerization/α,β-site-selective and enantioselective cycloaddition or conjugate addition reactions of latent non-γ-substituted allenoyl derivative.
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Affiliation(s)
- Weiwei Guo
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Masahiro Hori
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Yoshihiro Ogura
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuki Nishimura
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kosuke Oki
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Tomoyuki Ikai
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Eiji Yashima
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
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6
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Liu RH, Chai GL, Wang X, Deng HY, Chang J. Chiral-Boron-Complex-Catalyzed Asymmetric [3 + 2] Cycloaddition of β-Trifluoromethyl α,β-Unsaturated Ketones with N,N'-Cyclic Azomethine Imines. J Org Chem 2023; 88:16566-16580. [PMID: 37967281 DOI: 10.1021/acs.joc.3c02106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
The (R)-3,3'-(3,5-(CF3)2-C6H3)2-BINOL-boron-complex-catalyzed asymmetric 1,3-dipolar cycloaddition of β-trifluoromethyl α,β-unsaturated ketone with N,N'-cyclic azomethine imines was developed to afford N,N'-bicyclic pyrazolidine derivatives bearing a stereogenic carbon center containing CF3 motifs in high yields with excellent diastereo- and enantioselectivities (up to >20:1 dr, and >99% ee). This catalytic system features mild reaction conditions, high efficiency, and a broad substrate scope.
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Affiliation(s)
- Rui-Hao Liu
- Pingyuan Laboratory, State Key Laboratory of Antiviral Drugs, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Guo-Li Chai
- Pingyuan Laboratory, State Key Laboratory of Antiviral Drugs, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xiao Wang
- Pingyuan Laboratory, State Key Laboratory of Antiviral Drugs, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Hong-Yu Deng
- Pingyuan Laboratory, State Key Laboratory of Antiviral Drugs, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Junbiao Chang
- Pingyuan Laboratory, State Key Laboratory of Antiviral Drugs, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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7
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Yao L, Takeda K, Ando K, Ishihara K. Enantioselective aromatic Claisen rearrangement of allyl 2-naphthyl ethers catalyzed by π-Cu(ii) complexes. Chem Sci 2023; 14:2441-2446. [PMID: 36873835 PMCID: PMC9977442 DOI: 10.1039/d2sc06771d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 01/19/2023] [Indexed: 01/22/2023] Open
Abstract
The first catalytic enantioselective aromatic Claisen rearrangement of allyl 2-naphthyl ethers using 5-10 mol% of π-copper(ii) complexes is reported. A Cu(OTf)2 complex with an l-α-homoalanine amide ligand gave (S)-products in up to 92% ee. Conversely, a Cu(OSO2C4F9)2 complex with an l-tert-leucine amide ligand gave (R)-products in up to 76% ee. Density-functional-theory (DFT) calculations suggest that these Claisen rearrangements proceed stepwise via tight-ion-pair intermediates, and that (S)- and (R)-products are enantioselectively obtained via the staggered transition states for the cleavage of the C-O bond, which is the rate-determining step.
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Affiliation(s)
- Lu Yao
- Graduate School of Engineering, Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Kazuki Takeda
- Graduate School of Engineering, Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
| | - Kaori Ando
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University Gifu 501-1193 Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University B2-3(611) Furo-cho, Chikusa Nagoya 464-8603 Japan
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8
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Nishimura K, Ogura Y, Takeda K, Guo W, Ishihara K. Chiral π-Cu(II) Catalysts for the Enantioselective α-Amination of N-Acyl-3,5-dimethylpyrazoles. Org Lett 2022; 24:7685-7689. [PMID: 36215133 DOI: 10.1021/acs.orglett.2c03249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the highly enantioselective α-amination of N-acyl-3,5-dimethylpyrazoles with dialkyl azodicarboxylates, catalyzed by in situ generated π-Cu(II) complexes that consist of Cu(OTf)2 and N-(5H-dibenzo[a,d][7]annulen-5-yl)-l-alanine-derived amides, to give the corresponding products as d-α-amino acid derivatives (up to >99% yield and 99% ee). The site-selectivity and enantioselectivity can be satisfactorily explained by the coordination of dialkyl azodicarboxylate with π-Cu(II) complex. The synthetic potential of this one-pot transformation to the α-amino ester is also described.
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Affiliation(s)
- Kazuki Nishimura
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya464-8603, Japan
| | - Yoshihiro Ogura
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya464-8603, Japan
| | - Kazuki Takeda
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya464-8603, Japan
| | - Weiwei Guo
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya464-8603, Japan
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9
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Chai GL, Yao EZ, Liu RH, Chang J. Chiral-Boron-Complex-Catalyzed Asymmetric [3 + 2] Cycloaddition of 2'-Hydroxychalcones with N, N'-Cyclic Azomethine Imines. Org Lett 2022; 24:6449-6454. [PMID: 36040361 DOI: 10.1021/acs.orglett.2c02597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the (R)-3,3'-I2-BINOL-boron-complex-catalyzed asymmetric 1,3-dipolar cycloaddition of 2'-hydroxychalcones with N,N'-cyclic azomethine imines, providing the corresponding N,N'-bicyclic pyrazolidine derivatives with three contiguous tertiary stereocenters in high yields with excellent diastereo- and enantioselectivities (up to >99:1 diastereomeric ratio and >99% enantiomeric excess). This catalytic system exhibits advantages of mild reaction conditions, high efficiency, and broad substrate scopes.
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Affiliation(s)
- Guo-Li Chai
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| | - En-Ze Yao
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| | - Rui-Hao Liu
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| | - Junbiao Chang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
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10
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Norman NJ, Bao ST, Curts L, Hui T, Zheng SL, Shou T, Zeghibe A, Burdick I, Fuehrer H, Huang A. Highly Selective N-Alkylation of Pyrazoles: Crystal Structure Evidence for Attractive Interactions. J Org Chem 2022; 87:10018-10025. [PMID: 35877958 DOI: 10.1021/acs.joc.2c00980] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Inspired by crystal structures, we designed and achieved a catalyst-free Michael reaction for the preparation of an N1-alkyl pyrazole in a high yield (>90%) with excellent regioselectivity (N1/N2 > 99.9:1). The scope of this protocol has been extended to accomplish the first general regioselective N1-alkylation of 1H-pyrazoles to give di-, tri-, and tetra-substituted pyrazoles in a single step. The resulting pyrazoles bear versatile functional groups such as bromo, ester, nitro, and nitrile, offering opportunities for late-stage functionalization. This efficient methodology will have an impact on drug discovery, as several Food and Drug Administration-approved drugs are pyrazole derivatives. A working hypothesis for the regioselectivity is proposed. X-ray crystal structures of the products that highlight the attractive interactions are discussed. This report provides a rare source for the further elucidation of the attractive interactions because the isomeric ratios and the crystal structures are directly related.
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Affiliation(s)
- Natalie J Norman
- Department of Chemistry, Wellesley College, 106 Central Street, Wellesley, Massachusetts 02481, United States
| | - Si Tong Bao
- Department of Chemistry, Wellesley College, 106 Central Street, Wellesley, Massachusetts 02481, United States
| | - Lynne Curts
- Department of Chemistry, Wellesley College, 106 Central Street, Wellesley, Massachusetts 02481, United States
| | - Tiffani Hui
- Department of Chemistry, Wellesley College, 106 Central Street, Wellesley, Massachusetts 02481, United States
| | - Shao-Liang Zheng
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Bauer B06, Cambridge, Massachusetts 02138, United States
| | - Tiffany Shou
- Department of Chemistry, Wellesley College, 106 Central Street, Wellesley, Massachusetts 02481, United States
| | - Ana Zeghibe
- Department of Chemistry, Wellesley College, 106 Central Street, Wellesley, Massachusetts 02481, United States
| | - Izzy Burdick
- Department of Chemistry, Wellesley College, 106 Central Street, Wellesley, Massachusetts 02481, United States
| | - Hannah Fuehrer
- Department of Chemistry, Wellesley College, 106 Central Street, Wellesley, Massachusetts 02481, United States
| | - Adrian Huang
- Department of Chemistry, Wellesley College, 106 Central Street, Wellesley, Massachusetts 02481, United States
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11
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“Stacked-arene”-type organocatalysts: utilization of π-π interaction as an electron tuning tool. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Nishimura K, Wang Y, Ogura Y, Kumagai J, Ishihara K. A π–Cu(II)−π Complex as an Extremely Active Catalyst for Enantioselective α-Halogenation of N-Acyl-3,5-dimethylpyrazoles. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05500] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kazuki Nishimura
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya 464-8603, Japan
| | - Yanzhao Wang
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya 464-8603, Japan
| | - Yoshihiro Ogura
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya 464-8603, Japan
| | - Jun Kumagai
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Nagoya 464-8603, Japan
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13
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Yang Z, Zhou Y, Li H, Lei J, Bing P, He B, Li Y. A Facile Route to Pyrazolo[1,2‐a]cinnoline via Rhodium(III)‐catalyzed Annulation of Pyrazolidinoes and Iodonium Ylides. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Zi Yang
- Academician Workstation Changsha Medical University Changsha 410219 P. R. China
| | - Yi Zhou
- Academician Workstation Changsha Medical University Changsha 410219 P. R. China
| | - Haigang Li
- Academician Workstation Changsha Medical University Changsha 410219 P. R. China
- Hunan Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations Changsha Medical University Changsha 410219 P. R. China
| | - Jieni Lei
- Academician Workstation Changsha Medical University Changsha 410219 P. R. China
| | - Pingping Bing
- Academician Workstation Changsha Medical University Changsha 410219 P. R. China
| | - Binsheng He
- Academician Workstation Changsha Medical University Changsha 410219 P. R. China
| | - Yaqian Li
- Academician Workstation Changsha Medical University Changsha 410219 P. R. China
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14
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Zhang X, Wang H, Xie L, You C, Han X, Weng Z. Copper-Catalyzed Synthesis of 5-Aryl-6-(Trifluoromethyl)-2,3-Dihydropyrazolo[1,2-a]Pyrazol-1(5H)-One. Chem Asian J 2021; 16:2669-2673. [PMID: 34313007 DOI: 10.1002/asia.202100693] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/20/2021] [Indexed: 11/11/2022]
Abstract
An efficient protocol for the synthesis of 5-aryl-6-(trifluoromethyl)-2,3-dihydropyrazolo[1,2-a]pyrazol-1(5H)-one derivatives through a copper-catalyzed [3+2]-cycloaddition of azomethine imines with 3,3,3-trifluoropropyne (generated in situ from dehydrobromination of 2-bromo-3,3,3-trifluoropropene under base conditions) is developed. The advantages of this transformation are the broad substrate scope and the good functional group compatibility. The subsequent oxidation and nucleophilic substitution/aromatization provide a new approach to 4-trifluoromethylated pyrazol-1-yl propanoic acids.
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Affiliation(s)
- Xinyu Zhang
- Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials and Key Laboratory of Molecule Synthesis and Function Discovery College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Hui Wang
- Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials and Key Laboratory of Molecule Synthesis and Function Discovery College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Lili Xie
- Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials and Key Laboratory of Molecule Synthesis and Function Discovery College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Chenhui You
- Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials and Key Laboratory of Molecule Synthesis and Function Discovery College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Xiaoyan Han
- Testing and Analysis Center, Soochow University, Suzhou, 215123, P. R. China
| | - Zhiqiang Weng
- Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials and Key Laboratory of Molecule Synthesis and Function Discovery College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
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15
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16
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Meninno S, Franco F, Benaglia M, Lattanzi A. Pyrazoleamides in Catalytic Asymmetric Reactions: Recent Advances. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Sara Meninno
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Francesca Franco
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Maurizio Benaglia
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132 84084 Fisciano Italy
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17
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Synthesis of 6,7-Dihydro-1 H,5 H-pyrazolo[1,2- a]pyrazoles by Azomethine Imine-Alkyne Cycloadditions Using Immobilized Cu(II)-Catalysts. Molecules 2021; 26:molecules26020400. [PMID: 33451154 PMCID: PMC7828622 DOI: 10.3390/molecules26020400] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/07/2021] [Accepted: 01/11/2021] [Indexed: 11/17/2022] Open
Abstract
A series of 12 silica gel-bound enaminones and their Cu(II) complexes were prepared and tested for their suitability as heterogeneous catalysts in azomethine imine-alkyne cycloadditions (CuAIAC). Immobilized Cu(II)-enaminone complexes showed promising catalytic activity in the CuAIAC reaction, but these new catalysts suffered from poor reusability. This was not due to the decoordination of copper ions, as the use of enaminone ligands with additional complexation sites resulted in negligible improvement. On the other hand, reusability was improved by the use of 4-aminobenzoic acid linker, attached to 3-aminopropyl silica gel via an amide bond to the enaminone over the more hydrolytically stable N-arylenamine C-N bond. The study showed that silica gel-bound Cu(II)-enaminone complexes are readily available and suitable heterogeneous catalysts for the synthesis of 6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazoles.
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18
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Li Z, Kumagai N, Shibasaki M. Catalytic Asymmetric 1,3-Dipolar Cycloaddition of α,β-Unsaturated Amide and Azomethine Imine. Chem Pharm Bull (Tokyo) 2021; 68:552-554. [PMID: 32475860 DOI: 10.1248/cpb.c20-00130] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
α,β-Unsaturated amides were incorporated as viable dipolarophiles in a catalytic asymmetric 1,3-dipolar cycloaddition of azomethine imines. The use of a 7-azaindoline auxiliary was essential to acquire sufficient reactivity with excellent diastereoselectivity, likely due to the chelating activation of the amide by the In(III)/bishydroxamic acid complex. Although the enantioselectivity remains unsatisfactory, this work is an important step toward the development of an asymmetric catalysis utilizing stable and low-reactive substrates.
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Affiliation(s)
- Zhao Li
- Institute of Microbial Chemistry
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19
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Curran SP, Fallon BJ, Connon SJ. C
2
‐Symmetric Cinchona Alkaloid Derivatives: Versatile Catalysts for the Enantioselective C−C Bond Forming Conjugate Addition of Nucleophiles to Simple α,β‐Unsaturated Acyl Pyrazoles. ChemistrySelect 2020. [DOI: 10.1002/slct.202004505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Simon P. Curran
- School of Chemistry Trinity Biomedical Sciences Institute Trinity College Dublin 152-160 Pearse Street 2 Dublin Ireland
| | - Brendan J. Fallon
- School of Chemistry Trinity Biomedical Sciences Institute Trinity College Dublin 152-160 Pearse Street 2 Dublin Ireland
| | - Stephen J. Connon
- School of Chemistry Trinity Biomedical Sciences Institute Trinity College Dublin 152-160 Pearse Street 2 Dublin Ireland
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20
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Kartikey KDD, Reddy MS, Chowhan LR. Isatin N,N′-cyclic azomethine imine 1, 3-dipole mediated regio and diastereoselective synthesis of isoxazole-containing spirooxindoles by an abnormal [3 + 2] cycloaddition. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152664] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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21
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Ishihara K, Nishimura K, Yamakawa K. Enantio- and Site-Selective α-Fluorination of N-Acyl 3,5-Dimethylpyrazoles Catalyzed by Chiral π-Cu II Complexes. Angew Chem Int Ed Engl 2020; 59:17641-17647. [PMID: 32633892 DOI: 10.1002/anie.202007403] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Indexed: 11/11/2022]
Abstract
Catalytic enantioselective α-fluorination reactions of carbonyl compounds are among the most powerful and efficient synthetic methods for constructing optically active α-fluorinated carbonyl compounds. Nevertheless, α-fluorination of α-nonbranched carboxylic acid derivatives is still a big challenge because of relatively high pKa values of their α-hydrogen atoms and difficulty of subsequent synthetic transformation without epimerization. Herein we show that chiral copper(II) complexes of 3-(2-naphthyl)-l-alanine-derived amides are highly effective catalysts for the enantio- and site-selective α-fluorination of N-(α-arylacetyl) and N-(α-alkylacetyl) 3,5-dimethylpyrazoles. The substrate scope of the transformation is very broad (25 examples including a quaternary α-fluorinated α-amino acid derivative). α-Fluorinated products were converted into the corresponding esters, secondary amides, tertiary amides, ketones, and alcohols with almost no epimerization in high yield.
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Affiliation(s)
- Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, B2-3(611), Furo-cho, Chikusa, Nagoya, 464-8603, Japan
| | - Kazuki Nishimura
- Graduate School of Engineering, Nagoya University, B2-3(611), Furo-cho, Chikusa, Nagoya, 464-8603, Japan
| | - Katsuya Yamakawa
- Graduate School of Engineering, Nagoya University, B2-3(611), Furo-cho, Chikusa, Nagoya, 464-8603, Japan
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22
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Ishihara K, Nishimura K, Yamakawa K. Enantio‐ and Site‐Selective α‐Fluorination of
N
‐Acyl 3,5‐Dimethylpyrazoles Catalyzed by Chiral π–Cu
II
Complexes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007403] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kazuaki Ishihara
- Graduate School of Engineering Nagoya University B2-3(611), Furo-cho Chikusa Nagoya 464-8603 Japan
| | - Kazuki Nishimura
- Graduate School of Engineering Nagoya University B2-3(611), Furo-cho Chikusa Nagoya 464-8603 Japan
| | - Katsuya Yamakawa
- Graduate School of Engineering Nagoya University B2-3(611), Furo-cho Chikusa Nagoya 464-8603 Japan
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23
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Li T, Yang Z, Song Z, Chauvin R, Cui X. Rhodium(III)-Catalyzed [4+3] Annulation of N-Aryl-pyrazolidinones and Propargylic Acetates: Access to Benzo[c][1,2]diazepines. Org Lett 2020; 22:4078-4082. [DOI: 10.1021/acs.orglett.0c01139] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Tingfang Li
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China
| | - Zi Yang
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China
| | - Zhenyu Song
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China
| | - Remi Chauvin
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China
- LCC-CNRS, Université de Toulouse, UPS, 205 route de Narbonne, 31077 Toulouse, France
| | - Xiuling Cui
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China
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24
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Yao L, Ishihara K. Enantioselective [1,3] O-to-C rearrangement: dearomatization of alkyl 2-allyloxy/benzyloxy-1/3-naphthoates catalyzed by a chiral π-Cu(ii) complex. Chem Sci 2019; 10:2259-2263. [PMID: 30881650 PMCID: PMC6385897 DOI: 10.1039/c8sc05601c] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 01/10/2019] [Indexed: 11/29/2022] Open
Abstract
An unprecedented catalytic asymmetric [1,3] O-to-C rearrangement of alkyl 2-allyloxy/benzyloxy-1/3-naphthoates was realized under the catalysis of a chiral π-Cu(ii) complex (1-10 mol%). This dearomatization strategy provides facile access to highly functionalized β-naphthalenone derivatives bearing an all-carbon quaternary stereogenic center in high yield with excellent enantioselectivity. The π-cation interaction between the aromatic substituent of the ligand and the Cu(ii) center was proved by X-ray diffraction analysis and shown to be crucial for enantioselective control. Further preliminary mechanistic studies suggest that this intramolecular reaction proceeds through a contact ion pair intermediate.
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Affiliation(s)
- Lu Yao
- Graduate School of Engineering , Nagoya University , B2-3(611) Furo-cho, Chikusa , Nagoya 464-8603 , Japan .
| | - Kazuaki Ishihara
- Graduate School of Engineering , Nagoya University , B2-3(611) Furo-cho, Chikusa , Nagoya 464-8603 , Japan .
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25
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Shen S, Yang Y, Duan J, Jia Z, Liang J. Solvent incorporated sequential [3 + 2] annulation/substitution reaction of azomethine imines and propargyl sulfur ylide. Org Biomol Chem 2019; 16:1068-1072. [PMID: 29364309 DOI: 10.1039/c7ob03012f] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A novel solvent incorporated sequential [3 + 2] cycloaddition/substitution reaction of azomethine imines with propargyl sulfur ylide was developed. In the actual three-component reaction, propargyl sulfur ylide acts as a dipole reagent to furnish the annulation with azomethine imines, followed by the protic solvents acting as nucleophiles. The simple, mild, catalyst-free and practical protocol allows for the formation of N,N-bicyclic pyrazolidinones in moderate to excellent yields. Further transformation and gram-scale operations could also be achieved efficiently.
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Affiliation(s)
- Shoujie Shen
- Key Laboratory of Magnetic Molecules, Magnetic Information Materials Ministry of Education, The School of Chemical and Materia Science, Shanxi Normal University, Linfen, 041004, PR China. shoujie_shen @outlook.com
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26
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Volpe C, Meninno S, Capobianco A, Vigliotta G, Lattanzi A. 1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD) Triggered Diastereoselective [3+2] Cycloaddition of Azomethine Imines and Pyrazoleamides. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801567] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chiara Volpe
- Dipartimento di Chimica e Biologia “A. Zambelli”; Università di Salerno; Via Giovanni Paolo II 132 I-84084 Fisciano Italy
| | - Sara Meninno
- Dipartimento di Chimica e Biologia “A. Zambelli”; Università di Salerno; Via Giovanni Paolo II 132 I-84084 Fisciano Italy
| | - Amedeo Capobianco
- Dipartimento di Chimica e Biologia “A. Zambelli”; Università di Salerno; Via Giovanni Paolo II 132 I-84084 Fisciano Italy
| | - Giovanni Vigliotta
- Dipartimento di Chimica e Biologia “A. Zambelli”; Università di Salerno; Via Giovanni Paolo II 132 I-84084 Fisciano Italy
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “A. Zambelli”; Università di Salerno; Via Giovanni Paolo II 132 I-84084 Fisciano Italy
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27
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Yang QQ, Yin X, He XL, Du W, Chen YC. Asymmetric Formal [5 + 3] Cycloadditions with Unmodified Morita–Baylis–Hillman Alcohols via Double Activation Catalysis. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04942] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Qian-Qian Yang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Xiang Yin
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Xiao-Long He
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
- College of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
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28
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Chen B, Chu WD, Liu QZ. Formal [4 + 1] cycloaddition of in situ generated 1,2-diaza-1,3-dienes with diazo esters: facile approaches to dihydropyrazoles containing a quaternary center. RSC Adv 2019; 9:1487-1490. [PMID: 35518004 PMCID: PMC9059575 DOI: 10.1039/c8ra08909d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Accepted: 01/02/2019] [Indexed: 01/04/2023] Open
Abstract
A Cu(ii)/bisoxazoline ligand-promoted formal [4 + 1] cycloaddition of diazo esters with azoalkenes formed in situ has been developed. This strategy provides a potential protocol for the construction of dihydropyrazoles containing a quaternary center with good to excellent yields.
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Affiliation(s)
- Bo Chen
- Chemical Synthesis and Pollution Control, Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University No. 1, Shida Road Nanchong 637002 P. R. China
| | - Wen-Dao Chu
- Chemical Synthesis and Pollution Control, Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University No. 1, Shida Road Nanchong 637002 P. R. China
| | - Quan-Zhong Liu
- Chemical Synthesis and Pollution Control, Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University No. 1, Shida Road Nanchong 637002 P. R. China
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29
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Yang Z, Song Z, Jie L, Wang L, Cui X. Iridium(iii)-catalysed annulation of pyrazolidinones with propiolates: a facile route to pyrazolo[1,2-a] indazoles. Chem Commun (Camb) 2019; 55:6094-6097. [DOI: 10.1039/c9cc02232e] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iridium(iii)-catalysed C–H bond activation/subsequent [4+1] cyclization for the synthesis of pyrazolo[1,2-a] indazoles has been developed.
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Affiliation(s)
- Zi Yang
- Engineering Research Center of Molecular Medicine of Ministry of Education
- Key Laboratory of Fujian Molecular Medicine
- Key Laboratory of Xiamen Marine and Gene Drugs
- School of Biomedical Sciences
- Huaqiao University
| | - Zhenyu Song
- Engineering Research Center of Molecular Medicine of Ministry of Education
- Key Laboratory of Fujian Molecular Medicine
- Key Laboratory of Xiamen Marine and Gene Drugs
- School of Biomedical Sciences
- Huaqiao University
| | - Lianghua Jie
- Engineering Research Center of Molecular Medicine of Ministry of Education
- Key Laboratory of Fujian Molecular Medicine
- Key Laboratory of Xiamen Marine and Gene Drugs
- School of Biomedical Sciences
- Huaqiao University
| | - Lianhui Wang
- Engineering Research Center of Molecular Medicine of Ministry of Education
- Key Laboratory of Fujian Molecular Medicine
- Key Laboratory of Xiamen Marine and Gene Drugs
- School of Biomedical Sciences
- Huaqiao University
| | - Xiuling Cui
- Engineering Research Center of Molecular Medicine of Ministry of Education
- Key Laboratory of Fujian Molecular Medicine
- Key Laboratory of Xiamen Marine and Gene Drugs
- School of Biomedical Sciences
- Huaqiao University
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30
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Suga H, Yoshiwara M, Yamaguchi T, Bando T, Taguchi M, Inaba A, Goto Y, Kikuchi A, Itoh K, Toda Y. Enantioselective synthesis of 8-azabicyclo[3.2.1]octanes via asymmetric 1,3-dipolar cycloadditions of cyclic azomethine ylides using a dual catalytic system. Chem Commun (Camb) 2019; 55:1552-1555. [DOI: 10.1039/c8cc09224a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The asymmetric 1,3-dipolar cycloaddition between diazo imine-derived cyclic azomethine ylides and acryloylpyrazolidinone using a dual catalytic system is reported.
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Affiliation(s)
- Hiroyuki Suga
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Masahiro Yoshiwara
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Takaaki Yamaguchi
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Takashi Bando
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Mizuki Taguchi
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Ayano Inaba
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Yuichi Goto
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Ayaka Kikuchi
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
| | - Kennosuke Itoh
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University
- Tokyo 108-8641
- Japan
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University
- Tokyo 108-8641
| | - Yasunori Toda
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University
- Wakasato
- Japan
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31
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Kou YD, Zhao ZN, Yang X, Kalita SJ, Chen XJ, Xie ZZ, Zhao Y, Huang YY. Stereospecific Synthesis of Fluorinated Pyrazolidinones and Isoxazolidines via a Catalyst-Free 1,3-Dipolar Cycloaddition of β-Fluoroalkylated α,β-Unsaturated 2-Pyridylsulfones. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800435] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ying-Da Kou
- Department of Chemistry; School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 122 Luoshi Road, Wuhan 430070 Hubei China
| | - Zhen-Ni Zhao
- Department of Chemistry; School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 122 Luoshi Road, Wuhan 430070 Hubei China
| | - Xing Yang
- Department of Chemistry; School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 122 Luoshi Road, Wuhan 430070 Hubei China
| | - Subarna Jyoti Kalita
- Department of Chemistry; School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 122 Luoshi Road, Wuhan 430070 Hubei China
| | - Xue-Jian Chen
- Department of Chemistry; School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 122 Luoshi Road, Wuhan 430070 Hubei China
| | - Zhi-Zhong Xie
- Department of Chemistry; School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 122 Luoshi Road, Wuhan 430070 Hubei China
| | - Yan Zhao
- State Key Laboratory of Silicate Materials for Architectures; International School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road, Wuhan 430070 Hubei China
| | - Yi-Yong Huang
- Department of Chemistry; School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 122 Luoshi Road, Wuhan 430070 Hubei China
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32
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Gong J, Wan Q, Kang Q. Asymmetric [3 + 2] Cycloaddition Employing N,N′-Cyclic Azomethine Imines Catalyzed by Chiral-at-Metal Rhodium Complex. Org Lett 2018; 20:3354-3357. [PMID: 29763332 DOI: 10.1021/acs.orglett.8b01264] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jun Gong
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qian Wan
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, China
| | - Qiang Kang
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, China
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33
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Nelina-Nemtseva JI, Gulevskaya AV, Suslonov VV, Misharev AD. 1,3-Dipolar cycloaddition of azomethine imines to ethynyl hetarenes: A synthetic route to 2,3-dihydropyrazolo[1,2- a ]pyrazol-1(5 H )-one based heterobiaryls. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.01.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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34
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Li P, Xu X, Chen J, Yao H, Lin A. Rh(iii)-Catalyzed synthesis of pyrazolo[1,2-a]cinnolines from pyrazolidinones and diazo compounds. Org Chem Front 2018. [DOI: 10.1039/c8qo00209f] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pyrazolo[1,2-a]cinnolines were achieved via a rhodium(iii)-catalyzed redox-neutral annulation procedure, exhibiting good regioselectivity and high functional group tolerability.
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Affiliation(s)
- Panpan Li
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Xiaoying Xu
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Jiayi Chen
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Hequan Yao
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Aijun Lin
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
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35
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Gurubrahamam R, Nagaraju K, Chen K. Organocatalytic synthesis of densely functionalized oxa-bridged 2,6-epoxybenzo[b][1,5]oxazocine heterocycles. Chem Commun (Camb) 2018; 54:6048-6051. [DOI: 10.1039/c8cc02565g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An interesting organocascade reaction was developed to provide privileged epoxy-bridged azaheterocyclic skeletons.
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Affiliation(s)
- Ramani Gurubrahamam
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Koppanathi Nagaraju
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
| | - Kwunmin Chen
- Department of Chemistry
- National Taiwan Normal University
- Taipei 11677
- Republic of China
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36
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Hu S, Zhang J, Jin Q. DMAP-catalyzed alkylation of isatin N,N′-cyclic azomethine imine 1,3-dipoles with Morita–Baylis–Hillman carbonates. NEW J CHEM 2018. [DOI: 10.1039/c8nj00234g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Metal-free C(sp3)–H alkylation of an isatin N,N′-cyclic azomethine imine 1,3-dipole.
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Affiliation(s)
- Shihe Hu
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine
- Nanjing University of Chinese Medicine
- Nanjing 210028
- China
- Laboratories of Translational Medicine
| | - Jian Zhang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine
- Nanjing University of Chinese Medicine
- Nanjing 210028
- China
- Laboratories of Translational Medicine
| | - Qiaomei Jin
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine
- Nanjing University of Chinese Medicine
- Nanjing 210028
- China
- Laboratories of Translational Medicine
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37
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Synthesis of Non-Racemic Pyrazolines and Pyrazolidines by [3+2] Cycloadditions of Azomethine Imines. Molecules 2017; 23:molecules23010003. [PMID: 29267229 PMCID: PMC5943927 DOI: 10.3390/molecules23010003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 12/12/2017] [Accepted: 12/12/2017] [Indexed: 01/25/2023] Open
Abstract
Asymmetric [3+2] cycloadditions of azomethine imines comprise a useful synthetic tool for the construction of pyrazole derivatives with a variable degree of saturation and up to three stereogenic centers. As analogues of pyrrolidines and imidazolidines that are abundant among natural products, pyrazoline and pyrazolidine derivatives represent attractive synthetic targets due to their extensive applications in the chemical and medicinal industries. Following the increased understanding of the mechanistic aspect of metal-catalyzed and organocatalyzed [3+2] cycloadditions of 1,3-dipoles gained over recent years, significant strides have been taken to design and develop new protocols that proceed efficiently under mild synthetic conditions and duly benefit from superior functional group tolerance and selectivity. In this review, we represent the current state of the art in this field and detailed methods for the synthesis of non-racemic pyrazolines and pyrazolidines via [3+2] metal and organocatalyzed transformations reported since the seminal work of Kobayashi et al. and Fu et al. in 2002 and 2003 up to the end of year 2017.
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38
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Zhang Q, Guo S, Yang J, Yu K, Feng X, Lin L, Liu X. Asymmetric Formal [3 + 2]-Cycloaddition of Azomethine Imines with Azlactones To Synthesize Bicyclic Pyrazolidinones. Org Lett 2017; 19:5826-5829. [DOI: 10.1021/acs.orglett.7b02772] [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)
- Qian Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Songsong Guo
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Jian Yang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Kunru Yu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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39
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Yang C, Song F, Chen J, Huang Y. Construction of Pyridazine Analogues via
Rhodium-mediated C-H Activation. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700905] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chao Yang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology; Peking University; Shenzhen Graduate School; Shenzhen 518055 People's Republic of China
| | - Feifei Song
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology; Peking University; Shenzhen Graduate School; Shenzhen 518055 People's Republic of China
| | - Jiean Chen
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology; Peking University; Shenzhen Graduate School; Shenzhen 518055 People's Republic of China
| | - Yong Huang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology; Peking University; Shenzhen Graduate School; Shenzhen 518055 People's Republic of China
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40
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van der Mei FW, Qin C, Morrison RJ, Hoveyda AH. Practical, Broadly Applicable, α-Selective, Z-Selective, Diastereoselective, and Enantioselective Addition of Allylboron Compounds to Mono-, Di-, Tri-, and Polyfluoroalkyl Ketones. J Am Chem Soc 2017. [PMID: 28648084 DOI: 10.1021/jacs.7b05011] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A practical method for enantioselective synthesis of fluoroalkyl-substituted Z-homoallylic tertiary alcohols has been developed. Reactions may be performed with ketones containing a polylfluoro-, trifluoro-, difluoro-, and monofluoroalkyl group along with an aryl, a heteroaryl, an alkenyl, an alkynyl, or an alkyl substituent. Readily accessible unsaturated organoboron compounds serve as reagents. Transformations were performed with 0.5-2.5 mol % of a boron-based catalyst, generated in situ from a readily accessible valine-derived aminophenol and a Z- or an E-γ-substituted boronic acid pinacol ester. With a Z organoboron reagent, additions to trifluoromethyl and polyfluoroalkyl ketones proceeded in 80-98% yield, 97:3 to >98:2 α:γ selectivity, >95:5 Z:E selectivity, and 81:19 to >99:1 enantiomeric ratio. In notable contrast to reactions with unsubstituted allylboronic acid pinacol ester, additions to ketones with a mono- or a difluoromethyl group were highly enantioselective as well. Transformations were similarly efficient and α- and Z-selective when an E-allylboronate compound was used, but enantioselectivities were lower. In certain cases, the opposite enantiomer was favored (up to 4:96 er). With a racemic allylboronate reagent that contains an allylic stereogenic center, additions were exceptionally α-selective, affording products expected from γ-addition of a crotylboron compound, in up to 97% yield, 88:12 diastereomeric ratio, and 94:6 enantiomeric ratio. Utility is highlighted by gram-scale preparation of representative products through transformations that were performed without exclusion of air or moisture and through applications in stereoselective olefin metathesis where Z-alkene substrates are required. Mechanistic investigations aided by computational (DFT) studies and offer insight into different selectivity profiles.
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Affiliation(s)
- Farid W van der Mei
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Changming Qin
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Ryan J Morrison
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
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41
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Tomažin U, Grošelj U, Počkaj M, Požgan F, Štefane B, Svete J. Combinatorial Synthesis of Acacen-Type Ligands and Their Coordination Compounds. ACS COMBINATORIAL SCIENCE 2017; 19:386-396. [PMID: 28371583 DOI: 10.1021/acscombsci.7b00027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A highly modular synthetic method for the preparation of acacen-type ligands and their coordination compounds was developed. A series of 46 acacen-type ligands were synthesized by a combinatorial acid-catalyzed transamination between six primary diamines and eight enaminones. The bis-enaminone products were used as tetradentate ligands for coordination of copper(II), nickel(II), cobalt(II), and palladium(II). Dependence of the preferred E- or Z-configuration of the enaminone ligand on the α-substituent of the enaminone moiety in solution was determined by NMR and confirmed by X-ray diffraction. The copper(II) complexes were tested for their suitability as catalysts in 3 + 2 cycloaddition of azomethine imine to methyl propiolate.
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Affiliation(s)
- Urša Tomažin
- Faculty of Chemistry and
Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Uroš Grošelj
- Faculty of Chemistry and
Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Marta Počkaj
- Faculty of Chemistry and
Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Franc Požgan
- Faculty of Chemistry and
Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Bogdan Štefane
- Faculty of Chemistry and
Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Jurij Svete
- Faculty of Chemistry and
Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia
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42
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Mirnik J, Pušavec Kirar E, Ričko S, Grošelj U, Golobič A, Požgan F, Štefane B, Svete J. Cu 0 -catalysed 1,3-dipolar cycloadditions of α-amino acid derived N,N -cyclic azomethine imines to ynones. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.04.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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43
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Tong TMT, Soeta T, Suga T, Kawamoto K, Hayashi Y, Ukaji Y. Formal Total Synthesis of Manzacidin C Based on Asymmetric 1,3-Dipolar Cycloaddition of Azomethine Imines. J Org Chem 2017; 82:1969-1976. [DOI: 10.1021/acs.joc.6b02816] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thu Minh Thi Tong
- Division of Material Chemistry, Graduate
School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan
| | - Takahiro Soeta
- Division of Material Chemistry, Graduate
School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan
| | - Takuya Suga
- Division of Material Chemistry, Graduate
School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan
| | - Keisuke Kawamoto
- Division of Material Chemistry, Graduate
School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan
| | - Yoshihito Hayashi
- Division of Material Chemistry, Graduate
School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan
| | - Yutaka Ukaji
- Division of Material Chemistry, Graduate
School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan
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44
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Wang X, Yang P, Zhang Y, Tang CZ, Tian F, Peng L, Wang LX. Isatin N,N′-Cyclic Azomethine Imine 1,3-Dipole and Abnormal [3 + 2]-Cycloaddition with Maleimide in the Presence of 1,4-Diazabicyclo[2.2.2]octane. Org Lett 2017; 19:646-649. [DOI: 10.1021/acs.orglett.6b03815] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Xiao Wang
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Peng Yang
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong Zhang
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chao-Zhe Tang
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fang Tian
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Lin Peng
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Li-Xin Wang
- Key
Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
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45
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Peng X, Huang D, Wang KH, Wang Y, Wang J, Su Y, Hu Y. Synthesis of trifluoromethylated pyrazolidines by [3 + 2] cycloaddition. Org Biomol Chem 2017; 15:6214-6222. [DOI: 10.1039/c7ob01299c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[3 + 2] cycloaddition between trifluoromethylated N-acylhydrazones and nitroolefins in the presence of potassium hydroxide and Bu4NI is developed to afford potentially bioactive trifluoromethylated pyrazolidines.
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Affiliation(s)
- Xiansha Peng
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Danfeng Huang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Ke-Hu Wang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Yalin Wang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Juanjuan Wang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Yingpeng Su
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Yulai Hu
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
- State Key Laboratory of Applied Organic Chemistry
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46
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Pušavec Kirar E, Grošelj U, Golobič A, Požgan F, Pusch S, Weber C, Andernach L, Štefane B, Opatz T, Svete J. Absolute Configuration Determination of 2,3-Dihydro-1H,5H-pyrazolo[1,2-a]pyrazoles Using Chiroptical Methods at Different Wavelengths. J Org Chem 2016; 81:11802-11812. [PMID: 27801585 DOI: 10.1021/acs.joc.6b02270] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A correlation between the absolute configuration and chiroptical properties of nonracemic 1,6,7-trisubstituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazoles was studied. A series of 16 novel representatives were prepared by Cu-catalyzed [3 + 2] cycloadditions of racemic (Z)-2-benzylidene-5-oxopyrazolidin-2-ium-1-ides to tert-butyl (S)-(3-oxopent-4-yn-2-yl)carbamate, and their structures were determined by NMR, VCD, ECD, and X-ray diffraction. A clear correlation between the sign of specific rotation and configuration at position C(1) allows for easy determination of the absolute configuration of 1,6,7-trisubstituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazoles by ECD and NMR. While VCD, requiring milligram quantities, allowed the determination of the correct relative and absolute configuration without additional information from other methods, the stereochemical analysis by ECD required knowledge of the relative configuration derived from NMR at a comparable computational level.
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Affiliation(s)
- Eva Pušavec Kirar
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Uroš Grošelj
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Amalija Golobič
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Franc Požgan
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Stefan Pusch
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Carina Weber
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Lars Andernach
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Bogdan Štefane
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Till Opatz
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Jurij Svete
- Faculty of Chemistry and Chemical Technology, University of Ljubljana , Večna pot 113, SI-1000 Ljubljana, Slovenia
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47
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Synthesis and (3+2) cycloaddition reactions of N,N ʹ- and C,N-cyclic azomethine imines. Chem Heterocycl Compd (N Y) 2016. [DOI: 10.1007/s10593-016-1943-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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48
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Yang ZW, Wang JF, Peng LJ, You XL, Cui HL. Thermal 1,3-dipolar cycloaddition of azomethine imines with alkynes affording N,N-bicyclic pyrazolidinones under microwave irradiation. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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49
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Kolleth A, Lumbroso A, Tanriver G, Catak S, Sulzer-Mossé S, De Mesmaeker A. New access to quaternary aminocyclobutanes via nucleophilic addition on cyclobutaniminium salts. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.097] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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50
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Bongers A, Ranasinghe I, Lemire P, Perozzo A, Vincent-Rocan JF, Beauchemin AM. Synthesis of Cyclic Azomethine Imines by Cycloaddition Reactions of N-Isocyanates and N-Isothiocyanates. Org Lett 2016; 18:3778-81. [DOI: 10.1021/acs.orglett.6b01788] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amanda Bongers
- Centre for Catalysis Research
and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Indee Ranasinghe
- Centre for Catalysis Research
and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Philippe Lemire
- Centre for Catalysis Research
and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Alyssa Perozzo
- Centre for Catalysis Research
and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Jean-François Vincent-Rocan
- Centre for Catalysis Research
and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - André M. Beauchemin
- Centre for Catalysis Research
and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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