1
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Daniel FL, Srinivasan K. Intramolecular 1,2-Aroyl Migration in Spiro Donor-Acceptor Cyclopropanes: Formation of 1,4-Naphthoquinones and 1-Naphthols as Ring-Expansion Products. J Org Chem 2024; 89:5304-5313. [PMID: 38593430 DOI: 10.1021/acs.joc.3c02671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Most of the known rearrangement reactions of donor-acceptor cyclopropanes (DACs) involve the migration of cationic carbon atom to anionic carbon or heteroatoms in 1,3- or 1,4-positions. In the present work, we observed that spiro DACs based on 1,3-indanedione or 1-indanone moiety undergo intramolecular 1,2-aroyl migration when treated with titanium(IV) chloride to afford 1,4-naphthoquinones and α-naphthols readily. The reactions take place through the formation of putative 1,3-dipolar intermediates, followed by cleavage and migration of the aroyl group to the adjacent carbon to afford the ring-expansion products.
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Affiliation(s)
- Franklin Leslin Daniel
- School of Chemistry, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024, India
| | - Kannupal Srinivasan
- School of Chemistry, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024, India
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2
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Ham JS, Son M, Na CG, Park B, Baik MH, Sarpong R. Construction of Seven-Membered Oxacycles Using a Rh(I)-Catalyzed Cascade C-C Formation/Cleavage of Cyclobutenol Derivatives. J Org Chem 2024; 89:4647-4656. [PMID: 38497619 DOI: 10.1021/acs.joc.3c02914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Herein, we describe the synthesis of substituted oxepane derivatives through the skeletal remodeling of 4-hydroxy-2-cyclobutenones, which are readily prepared from commercially available dialkyl squarates upon their reaction with acrylonitrile. Mechanistically, a Rh(I)-catalyzed C-C bond formation and cleavage cascade is proposed. Specifically, a fused [3.2.0] bicycle is proposed to form from dialkyl squarate-derived cyclobutenols via an unusual Rh(I)-catalyzed intermolecular oxa-Michael addition of a tertiary alcohol with acrylonitrile, followed by an intramolecular conjugate addition/migratory insertion. Subsequent C(sp3)-C(sp3) bond cleavage through a Rh-catalyzed β-carbon elimination is then theorized to furnish the oxepane scaffold. Computational studies support the formation of an intermediate [3.2.0] bicycle but also point to an alternative pathway for the formation of the oxepane products involving a Rh(III) intermediate. Additional studies have shown the overall process to be stereoretentive. The functional groups that are introduced in this process can be leveraged to form fused or bridged ring systems.
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Affiliation(s)
- Jin Su Ham
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Mina Son
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Christina G Na
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Bohyun Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Mu-Hyun Baik
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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3
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Zhu C, Yuan Z, Deng Z, Yin D, Zhang Y, Zhou J, Rao Y. Photoenzymatic Enantioselective Synthesis of Oxygen-Containing Benzo-Fused Heterocycles. Angew Chem Int Ed Engl 2023; 62:e202311762. [PMID: 37899302 DOI: 10.1002/anie.202311762] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 10/26/2023] [Accepted: 10/29/2023] [Indexed: 10/31/2023]
Abstract
New-to-nature biocatalysis in organic synthesis has recently emerged as a green and powerful strategy for the preparation of valuable chiral products, among which chiral oxygen-containing benzo-fused heterocycles are important structural motifs in pharmaceutical industry. However, the asymmetric synthesis of these compounds through radical-mediated methods is challenging. Herein, a novel asymmetric radical-mediated photoenzymatic synthesis strategy is developed to realize the efficient enantioselective synthesis of oxygen-containing benzo-fused heterocycles through structure-guided engineering of a flavin-dependent 'ene'-reductase GluER. It shows that variant GluER-W100H could efficiently produce various benzoxepinones, chromanone and indanone with different benzo-fused rings in high yields with great stereoselectivities under visible light. Moreover, these results are well supported by mechanistic experiments, revealing that this photoenzymatic process involves electron donor-acceptor complex formation, single electron transfer and hydrogen atom transfer. Therefore, we provide an alternative green approach for efficient chemoenzymatic synthesis of important chiral skeletons of bioactive pharmaceuticals.
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Affiliation(s)
- Changtong Zhu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 214122, Wuxi, P. R. China
| | - Zhenbo Yuan
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 214122, Wuxi, P. R. China
| | - Zhiwei Deng
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 214122, Wuxi, P. R. China
| | - Dejing Yin
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 214122, Wuxi, P. R. China
| | - Yan Zhang
- School of Life Sciences and Health Engineering, Jiangnan University, 214122, Wuxi, P. R. China
| | - Jingwen Zhou
- Science Center for Future Foods, Jiangnan University, 214122, Wuxi, P. R. China
| | - Yijian Rao
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 214122, Wuxi, P. R. China
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4
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Zhu MS, Zhang XQ, Wang YN, Xu YJ, Sun R, Ge JF. Preparation of Chromeno[ b]quinoline Derivatives and Their Application for Lipid Droplets Markers. J Org Chem 2022; 87:10385-10389. [PMID: 35802521 DOI: 10.1021/acs.joc.2c00667] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Functional dyes with a chromeno[b]quinoline skeleton (3a-d) were synthesized by one-step cyclization between coumarin derivatives and aromatic amines under the promotion of anhydrous aluminum chloride in 41.2-45.8% yields. Their maximum absorption and emission wavelengths locate at 358-396 and 420-603 nm with large Stokes shifts (168-231 nm), and their intramolecular charge transfer has been corroborated by density functional theory calculations. Cell experiments have proved that the probes 3a-c possess the ability to target lipid droplets.
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Affiliation(s)
- Ming-Sen Zhu
- College of Chemistry, Chemical Engineering and Material Science, Soochow University, No. 199 Ren'Ai Road, Suzhou 215123, China
| | - Xiao-Qing Zhang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection and Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, No. 199 Ren'Ai Road, Suzhou 215123, China
| | - Ya-Nan Wang
- College of Chemistry, Chemical Engineering and Material Science, Soochow University, No. 199 Ren'Ai Road, Suzhou 215123, China
| | - Yu-Jie Xu
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection and Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, No. 199 Ren'Ai Road, Suzhou 215123, China
| | - Ru Sun
- College of Chemistry, Chemical Engineering and Material Science, Soochow University, No. 199 Ren'Ai Road, Suzhou 215123, China
| | - Jian-Feng Ge
- College of Chemistry, Chemical Engineering and Material Science, Soochow University, No. 199 Ren'Ai Road, Suzhou 215123, China
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5
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Comparative computational studies for nucleophilic aromatic substitution of dinitro-substituted benzannulated heterocycles with 1H-1,2,3-triazole. Struct Chem 2022. [DOI: 10.1007/s11224-022-01993-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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Yu Q, Zhang J, Wu F, Liu X, Wang C, Zhang J, Rong L. Propargyl Chalcones' Radical Annulation/Sulfonation Reaction: Efficient Synthesis of Benzo[ b]oxepin-5(2 H)-one and Chromane Derivatives. J Org Chem 2022; 87:7136-7149. [PMID: 35607936 DOI: 10.1021/acs.joc.2c00361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A novel and facile methodology for the synthesis of sulfonated benzo[b]oxepinone and chromane derivatives was reported by the reaction of propargyl chalcones with arylsulfonyl chloride via radical cascade annulation/sulfonation under laboratory conditions. Readily available propargyl chalcones, commercialized arylsulfonyl chloride, and simple reaction conditions make this six(seven)-membered oxygen-containing heterocycles' synthetic strategy more attractive and with significant application values.
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Affiliation(s)
- Qiuyu Yu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Jinghang Zhang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Fan Wu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Xiaoqin Liu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Chang Wang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China.,School of Pharmaceutical Sciences, Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, Shandong, PR China
| | - Jinpeng Zhang
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou 221004, Jiangsu, PR China
| | - Liangce Rong
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
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7
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Nallapati S, Tseng MF, Chen PL, Chuang SC. Phosphine-Mediated [4 + 3] Annulation of Diynoates and 2-Arylidene Indane-1,3-diones: Access of Indeno[1,2- b]oxepin-4-ylidenes and Beyond. Org Lett 2022; 24:2993-2997. [PMID: 35442699 DOI: 10.1021/acs.orglett.2c00893] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel unprecedented triphenylphosphine-mediated [4 + 3] annulation reaction of 2-benzylidene indane-1,3-diones and -diynoates through initial phosphine α-addition was discovered and found to result in biologically interesting indeno[1,2-b]oxepin-4-ylidenes in up to 75% yield. The seven-membered separable Z and E isomeric oxepins were confirmed using single-crystal X-ray diffraction.
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Affiliation(s)
- Sureshbabu Nallapati
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C.,Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C
| | - Min-Feng Tseng
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C.,Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C
| | - Pei-Ling Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu 30050 Taiwan, R.O.C
| | - Shih-Ching Chuang
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C.,Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C
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8
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Han XD, Peng GL, Xiong W, Gan R, Fu JP, Wu L, Tang ZS, Hu JW, Wang HB. A base-mediated aerobic oxidative synthesis of cyclopent-2-enol derivatives from doubly activated cyclopropanes and substituted acetonitriles. Org Biomol Chem 2022; 20:1095-1102. [PMID: 35019920 DOI: 10.1039/d1ob02155a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We report here that polysubstituted cyclopent-2-enols can be constructed by the one-pot reaction of doubly activated cyclopropanes and α-EWG substituted acetonitriles under mild basic conditions via a domino-ring-opening-cyclization/deacylation/oxidation sequence. Moreover, the synthetic applications of these cyclopent-2-enols have been demonstrated in the late-stage derivatization into functionalized cyclopentapyrimidin-4-ones and 2-hydroxy cyclopentanones with good yields.
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Affiliation(s)
- Xiao-Dan Han
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Gao-Liang Peng
- Jiangxi University of Applied Science, Nanchang, 330100, China
| | - Wei Xiong
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Ran Gan
- Jiangxi Academy of Forestry, Nanchang, 330096, China
| | - Jian-Ping Fu
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Lei Wu
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Zhong-Sheng Tang
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Ju-Wu Hu
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Hui-Bin Wang
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
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9
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Vartanova AE, Plodukhin AY, Ratmanova NK, Andreev IA, Anisimov MN, Gudimchuk NB, Rybakov VB, Levina II, Ivanova OA, Trushkov IV, Alabugin IV. Expanding Stereoelectronic Limits of endo- tet Cyclizations: Synthesis of Benz[ b]azepines from Donor-Acceptor Cyclopropanes. J Am Chem Soc 2021; 143:13952-13961. [PMID: 34406759 DOI: 10.1021/jacs.1c07088] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The importance of intramolecular constraints in cyclic transition-state geometries is especially pronounced in n-endo-tet cyclizations, where the usual backside approach of a nucleophile to the breaking bond is impossible for the rings containing less than eight atoms. Herein, we expand the limits of endo-tet cyclizations and show that donor-acceptor cyclopropanes can provide a seven-membered ring via a genuine 6-endo-tet process. Substrates containing a N-alkyl-N-arylcarbamoyl moiety as an acceptor group undergo Lewis acid-induced cyclization to form tetrahydrobenz[b]azepin-2-ones in high yields. The reaction proceeds with the inversion of the configuration at the electrophilic carbon. In this process, a formally six-membered transition state yields a seven-membered ring as the pre-existing cycle is merged into the forming ring. The stereochemistry of the products can be controlled by the reaction time and by the nature of Lewis acid, opening access to both diastereomers by tuning of the reaction conditions.
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Affiliation(s)
- Anna E Vartanova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119334, Russian Federation.,Faculty of Science, RUDN University, Moscow 117198, Russian Federation
| | - Andrey Yu Plodukhin
- Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Nina K Ratmanova
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology, and Immunology, Moscow 117997, Russian Federation
| | - Ivan A Andreev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119334, Russian Federation.,Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology, and Immunology, Moscow 117997, Russian Federation
| | - Mikhail N Anisimov
- Department of Physics, M. V. Lomonosov Moscow State University, Moscow 119991, Russian Federation.,Center for Theoretical Problems of Physicochemical Pharmacology, Moscow 119334, Russian Federation
| | - Nikita B Gudimchuk
- Department of Physics, M. V. Lomonosov Moscow State University, Moscow 119991, Russian Federation.,Center for Theoretical Problems of Physicochemical Pharmacology, Moscow 119334, Russian Federation
| | - Victor B Rybakov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Irina I Levina
- Institute of Biochemical Physics, Russian Academy of Sciences, Moscow 119334, Russian Federation
| | - Olga A Ivanova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119334, Russian Federation.,Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Igor V Trushkov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119334, Russian Federation
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390 United States
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10
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Jaithum K, Tummatorn J, Boekfa B, Thongsornkleeb C, Chainok K, Ruchirawat S. Diastereoselective Synthesis of Spirocyclic Ether from
ortho
‐Carbonylarylacetylenols via Silver‐Catalyzed Cyclization under Acidic Conditions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100548] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Kanokwan Jaithum
- Center of Excellence on Environmental Health and Toxicology (EHT) Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Jumreang Tummatorn
- Center of Excellence on Environmental Health and Toxicology (EHT) Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
- Laboratory of Medicinal Chemistry Chulabhorn Research Institute 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Bundet Boekfa
- Department of Chemistry Faculty of Liberal Arts and Science Kasetsart University Kamphaeng Saen Campus Nakhon Pathom 73140 Thailand
| | - Charnsak Thongsornkleeb
- Center of Excellence on Environmental Health and Toxicology (EHT) Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
- Laboratory of Organic Synthesis Chulabhorn Research Institute 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Kittipong Chainok
- Thammasat University Research Unit in Multifunctional Crystalline Materials and Applications (TU-MCMA) Faculty of Science and Technology Thammasat University Pathum Thani 12121 Thailand
| | - Somsak Ruchirawat
- Center of Excellence on Environmental Health and Toxicology (EHT) Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
- Laboratory of Medicinal Chemistry Chulabhorn Research Institute 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
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11
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Sinka V, Martín VS, Cruz DA, Padrón JI. Synthesis of Seven Membered Oxacycles: Recent Developments and New Approaches. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000850] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Victoria Sinka
- Molecular Sciences Department Instituto de Productos Naturales y Agrobiología Consejo Superior de Investigaciones Científicas (IPNA‐CSIC) Avda. Astrofísico Francisco Sánchez 3 38206 La Laguna Tenerife, Islas Canarias Spain
| | - Víctor S. Martín
- Instituto Universitario de Bio‐Orgánica “Antonio González” “Síntesis Orgánica Sostenible Unidad Asociada al CSIC”, Departamento de Química Orgánica Universidad de La Laguna C/ Francisco Sánchez 2 38206 La Laguna Tenerife, Islas Canarias Spain
| | - Daniel A. Cruz
- Instituto Universitario de Bio‐Orgánica “Antonio González” “Síntesis Orgánica Sostenible Unidad Asociada al CSIC”, Departamento de Química Orgánica Universidad de La Laguna C/ Francisco Sánchez 2 38206 La Laguna Tenerife, Islas Canarias Spain
| | - Juan I. Padrón
- Molecular Sciences Department Instituto de Productos Naturales y Agrobiología Consejo Superior de Investigaciones Científicas (IPNA‐CSIC) Avda. Astrofísico Francisco Sánchez 3 38206 La Laguna Tenerife, Islas Canarias Spain
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12
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Mishra UK, Patel K, Ramasastry SSV. Ring-Opening/Recyclization Cascades of Monoactivated Cyclopropanes. Org Lett 2020; 22:3815-3819. [PMID: 32330047 DOI: 10.1021/acs.orglett.0c01056] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A variety of cyclopropyl aryl ketones undergo uncatalyzed cascade ring-opening/recyclization reactions to generate indenones and fluorenones. In addition, a new strategy to access 3-hydroxyindanones possessing two contiguous stereogenic centers, one of them being an all-carbon quaternary center, was also established. During the course of the investigation, pronounced solvent, temperature, and substituent effects on the product distribution were discovered.
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Affiliation(s)
- Uttam K Mishra
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Manauli PO, S A S Nagar, Punjab 140306, India
| | - Kaushalendra Patel
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Manauli PO, S A S Nagar, Punjab 140306, India
| | - S S V Ramasastry
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Manauli PO, S A S Nagar, Punjab 140306, India
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13
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Chen L, He J. DABCO-Catalyzed Michael/Alkylation Cascade Reactions Involving α-Substituted Ammonium Ylides for the Construction of Spirocyclopropyl Oxindoles: Access to the Powerful Chemical Leads against HIV-1. J Org Chem 2020; 85:5203-5219. [DOI: 10.1021/acs.joc.9b03164] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Lin Chen
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, China
| | - Jin He
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, China
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14
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Mikhaylov AA, Kuleshov AV, Solyev PN, Korlyukov AA, Dorovatovskii PV, Mineev KS, Baranov MS. Imidazol-5-one as an Acceptor in Donor-Acceptor Cyclopropanes: Cycloaddition with Aldehydes. Org Lett 2020; 22:2740-2745. [PMID: 32186194 DOI: 10.1021/acs.orglett.0c00725] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Spiro[imidazol-5-one-4,1'-cyclopropanes] behave as donor-acceptor (D-A) cyclopropanes in a formal cycloaddition reaction with aldehydes. The activation of such type of cyclopropanes is achieved with an equivalent of Brønsted acid. The reaction proceeds in high yields of 51-92% and demonstrates moderate diastereoselectivity at the quaternary stereocenter, which is determined by the electron-donating nature of the aldehyde partner. The ease of separation of stereoisomers allowed the creation of a library of 44 spiroannulated tetrahydrofurans with various substitution patterns.
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Affiliation(s)
- Andrey A Mikhaylov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 16/10 Miklukho-Maklaya Street, Moscow 117997, Russia
| | - Andrei V Kuleshov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 16/10 Miklukho-Maklaya Street, Moscow 117997, Russia.,Chemistry Department, Moscow State University, 1-3 Leninskiye Gory, Moscow 119991, Russia
| | - Pavel N Solyev
- Engelhardt Institute of Molecular Biology of the Russian Academy of Sciences, 32 Vavilova Street, Moscow 119991, Russia
| | - Alexander A Korlyukov
- Nesmeyanov Institute of Organoelement Compounds, 28 Vavilova Street, Moscow 119334, Russia
| | - Pavel V Dorovatovskii
- National Research Center "Kurchatov Institute", 1, Akademika Kurchatova Place, Moscow 123182, Russia
| | - Konstantin S Mineev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 16/10 Miklukho-Maklaya Street, Moscow 117997, Russia
| | - Mikhail S Baranov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 16/10 Miklukho-Maklaya Street, Moscow 117997, Russia.,Pirogov Russian National Research Medical University, 1 Ostrovitianov Streer, Moscow 117997, Russia
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15
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Chang MY, Lai KX, Chang YL. In(OTf)3-catalyzed intramolecular hydroarylation of α-phenylallyl β-ketosulfones – synthesis of sulfonyl 1-benzosuberones and 1-tetralones. RSC Adv 2020; 10:18231-18244. [PMID: 35517185 PMCID: PMC9053753 DOI: 10.1039/d0ra01962c] [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: 03/01/2020] [Accepted: 05/05/2020] [Indexed: 11/21/2022] Open
Abstract
In(OTf)3-catalyzed intramolecular hydroarylation of α-phenylallyl β-ketosulfones provides sulfonyl 1-benzosuberones and 1-tetralones in moderate to good yields in refluxing (CH2Cl)2 under open-vessel and easy-operation reaction conditions. A plausible mechanism is proposed and discussed. This highly regioselective protocol provides an atom-economic ring-closure route. In(OTf)3-catalyzed intramolecular hydroarylation of α-phenylallyl β-ketosulfones provides sulfonyl 1-benzosuberones and 1-tetralones in moderate to good yields in refluxing (CH2Cl)2 under open-vessel and easy-operation reaction conditions.![]()
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Affiliation(s)
- Meng-Yang Chang
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University Hospital
- Kaohsiung Medical University
- Kaohsiung 80708
- Taiwan
| | - Kai-Xiang Lai
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University Hospital
- Kaohsiung Medical University
- Kaohsiung 80708
- Taiwan
| | - Yu-Lun Chang
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University Hospital
- Kaohsiung Medical University
- Kaohsiung 80708
- Taiwan
| |
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