1
|
Zhao R, Teng J, Wang Z, Dong W, Lin J, Chu C. Copper on charcoal: Cu 0 nanoparticle catalysed aerobic oxidation of α-diazo esters. Org Biomol Chem 2021; 19:6120-6126. [PMID: 34179916 DOI: 10.1039/d1ob00811k] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By using a charcoal supported nano Cu0 catalyst (Cu/C), a highly efficient oxidation of α-diazo esters to α-ketoesters with molecular oxygen as the sole oxidant has been developed. In the presence of the Cu/C catalyst, 2-aryl-α-diazo esters with both electron-donating and electron-withdrawing groups can be oxidized to the corresponding α-ketoesters efficiently. Furthermore, this Cu/C catalyst can catalyse the reaction of aryl α-diazo ester with water to form aryl ketoester, 2-aryl-2-hydroxyl acetate ester and 2-aryl acetate ester. In this case, water is split by α-diazo ester, and the diazo group is displaced by the oxygen or hydrogen atom in water. Mechanistic investigation showed that the reaction of α-diazo ester with oxygen proceeds through a radical pathway. In the presence of 2,2,6,6-tetramethyl piperidine nitrogen oxide, the reaction of α-diazo ester with oxygen is dramatically inhibited. Furthermore, the reaction of α-diazo ester with water is investigated by an isotopic tracer method, and GCMS detection showed that a disproportionation reaction occurred between α-diazo ester and water.
Collapse
Affiliation(s)
- Rong Zhao
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; Shanghai Key Laboratory of New Drug Design; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
| | - Jiangge Teng
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; Shanghai Key Laboratory of New Drug Design; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
| | - Zhiwei Wang
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; Shanghai Key Laboratory of New Drug Design; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
| | - Wenwen Dong
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; Shanghai Key Laboratory of New Drug Design; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
| | - Jia Lin
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; Shanghai Key Laboratory of New Drug Design; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
| | - Changhu Chu
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; Shanghai Key Laboratory of New Drug Design; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
| |
Collapse
|
2
|
Stuhr-Hansen N. Synthesis of 2,2-diarylvinyl phenyl selenides by dehydration of 2-hydroxyalkyl phenyl selenides. HETEROATOM CHEMISTRY 2018. [DOI: 10.1002/hc.21438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
3
|
Huang J, Gu Y, Guo K, Zhu L, Lan Y, Gong J, Yang Z. Bioinspired Total Synthesis of Homodimericin A. Angew Chem Int Ed Engl 2017; 56:7890-7894. [PMID: 28514079 DOI: 10.1002/anie.201702768] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Indexed: 11/07/2022]
Abstract
Homodimericin A is a remarkable fungal metabolite. This highly oxygenated racemic unsaturated polyketide poses a significant synthetic challenge owing to its sterically demanding central cagelike core containing eight contiguous stereogenic centers (including three quaternary stereocenters) and several carbonyl functionalities. On the basis of its proposed biogenetic synthesis, we designed a total synthesis of homodimericin A that proceeds in seven steps and features a double Michael reaction, an intramolecular Diels-Alder reaction, and an ene reaction.
Collapse
Affiliation(s)
- Jun Huang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Yueqing Gu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Kai Guo
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Lei Zhu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.,School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, China
| | - Yu Lan
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, China
| | - Jianxian Gong
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Zhen Yang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.,Beijing National Laboratory for Molecular Science and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education, College of Chemistry and Molecular Engineering and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao, National Laboratory for Marine Science and Technology, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
| |
Collapse
|
4
|
Huang J, Gu Y, Guo K, Zhu L, Lan Y, Gong J, Yang Z. Bioinspired Total Synthesis of Homodimericin A. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702768] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jun Huang
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
| | - Yueqing Gu
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
| | - Kai Guo
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
| | - Lei Zhu
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
- School of Chemistry and Chemical Engineering; Chongqing University; Chongqing 400030 China
| | - Yu Lan
- School of Chemistry and Chemical Engineering; Chongqing University; Chongqing 400030 China
| | - Jianxian Gong
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
| | - Zhen Yang
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
- Beijing National Laboratory for Molecular Science and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education; College of Chemistry and Molecular Engineering and Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
- Laboratory for Marine Drugs and Bioproducts of Qingdao; National Laboratory for Marine Science and Technology; Ocean University of China; 5 Yushan Road Qingdao 266003 China
| |
Collapse
|
5
|
Tymann D, Dragon DC, Golz C, Preut H, Strohmann C, Hiersemann M. Crystal structure of N'-[(E)-(1S,3R)-(3-isopropyl-1-methyl-2-oxo-cyclo-pent-yl)methyl-idene]-4-methyl-benzene-sulfono-hydrazide. Acta Crystallogr E Crystallogr Commun 2015; 71:o904-5. [PMID: 26870519 PMCID: PMC4719872 DOI: 10.1107/s2056989015020307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 10/27/2015] [Indexed: 11/13/2022]
Abstract
The title compound, C17H24N2O3S, was synthesized in order to determine the relative configuration of the corresponding β-keto aldehyde. In the U-shaped mol-ecule, the five-membered ring approximates an envelope, with the methyl-ene C atom adjacent to the quaternary C atom being the flap, and the methyl and isopropyl substituents lying to the same side of the ring. The dihedral angles between the four nearly coplanar atoms of the five-membered ring and the flap and the aromatic ring are 35.74 (15) and 55.72 (9)°, respectively. The bond angles around the S atom are in the range from 103.26 (12) to 120.65 (14)°. In the crystal, mol-ecules are linked via N-H⋯O hydrogen bonds, forming a chain along the a axis.
Collapse
Affiliation(s)
- David Tymann
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Dina Christina Dragon
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Christopher Golz
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Hans Preut
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Carsten Strohmann
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Martin Hiersemann
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| |
Collapse
|
6
|
Chen X, Fan H, Zhang S, Yu C, Wang W. Facile Installation of 2-Reverse Prenyl Functionality into Indoles by a Tandem N-Alkylation-Aza-Cope Rearrangement Reaction and Its Application in Synthesis. Chemistry 2015; 22:716-23. [PMID: 26586470 DOI: 10.1002/chem.201503355] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Indexed: 11/06/2022]
Abstract
An unprecedented tandem N-alkylation-ionic aza-Cope (or Claisen) rearrangement-hydrolysis reaction of readily available indolyl bromides with enamines is described. Due to the complicated nature of the two processes, an operationally simple N-alkylation and subsequent microwave-irradiated ionic aza-Cope rearrangement-hydrolysis process has been uncovered. The tandem reaction serves as a powerful approach to the preparation of synthetically and biologically important, but challenging, 2-reverse quaternary-centered prenylated indoles with high efficiency. Notably, unusual nonaromatic 3-methylene-2,3-dihydro-1H-indole architectures, instead of aromatic indoles, are produced. Furthermore, the aza-Cope rearrangement reaction proceeds highly regioselectively to give the quaternary-centered reverse prenyl functionality, which often produces a mixture of two regioisomers by reported methods. The synthetic value of the resulting nonaromatic 3-methylene-2,3-dihydro-1H-indole architectures has been demonstrated as versatile building blocks in the efficient synthesis of structurally diverse 2-reverse prenylated indoles, such as indolines, indole-fused sultams and lactams, and the natural product bruceolline D.
Collapse
Affiliation(s)
- Xiaobei Chen
- School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237 (P. R. China). , .,Department of Chemistry & Chemical Biology, University of New Mexico, MSC03 2060, Albuquerque, NM 87131-0001 (USA), Fax: (+1)505-277-2609. ,
| | - Huaqiang Fan
- School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237 (P. R. China)
| | - Shilei Zhang
- Department of Chemistry & Chemical Biology, University of New Mexico, MSC03 2060, Albuquerque, NM 87131-0001 (USA), Fax: (+1)505-277-2609.,College of Pharmaceutical Sciences, Soochow University, 199 Ren'ai Road, Suzhou 215123 (P.R. China)
| | - Chenguang Yu
- Department of Chemistry & Chemical Biology, University of New Mexico, MSC03 2060, Albuquerque, NM 87131-0001 (USA), Fax: (+1)505-277-2609
| | - Wei Wang
- School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237 (P. R. China). , .,Department of Chemistry & Chemical Biology, University of New Mexico, MSC03 2060, Albuquerque, NM 87131-0001 (USA), Fax: (+1)505-277-2609. ,
| |
Collapse
|
7
|
Srimontree W, Masusai C, Soorukram D, Kuhakarn C, Reutrakul V, Pohmakotr M. Intramolecular Conjugate Ene Reaction of γ-Difluoromethyl- and γ-Trifluoromethyl-α,β-Unsaturated γ-Butyrolactones. J Org Chem 2015; 80:10512-20. [DOI: 10.1021/acs.joc.5b01562] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Watchara Srimontree
- Center
of Excellence for Innovation in Chemistry (PERCH−CIC) and Department
of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Chonticha Masusai
- Faculty
of Applied Science and Engineering, Khon Kaen University, Nong
Khai Campus, Nong Khai 43000, Thailand
| | - Darunee Soorukram
- Center
of Excellence for Innovation in Chemistry (PERCH−CIC) and Department
of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Chutima Kuhakarn
- Center
of Excellence for Innovation in Chemistry (PERCH−CIC) and Department
of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Vichai Reutrakul
- Center
of Excellence for Innovation in Chemistry (PERCH−CIC) and Department
of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Manat Pohmakotr
- Center
of Excellence for Innovation in Chemistry (PERCH−CIC) and Department
of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| |
Collapse
|
8
|
Kotha S, Chinnam AK, Ali R. Hybrid macrocycle formation and spiro annulation on cis-syn-cis-tricyclo[6.3.0.0(2,6)]undeca-3,11-dione and its congeners via ring-closing metathesis. Beilstein J Org Chem 2015. [PMID: 26199668 PMCID: PMC4505178 DOI: 10.3762/bjoc.11.126] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We have developed a simple methodology to transform cis-syn-cis-triquinane derivative 2 into the diindole based macrocycle 6 involving Fischer indolization and ring-closing metathesis (RCM). Various spiro-polyquinane derivatives have been assembled via RCM as a key step.
Collapse
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
| | - Ajay Kumar Chinnam
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
| | - Rashid Ali
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
| |
Collapse
|
9
|
Tymann D, Dragon DC, Golz C, Preut H, Strohmann C, Hiersemann M. Crystal structure of ( E)- N′-{[(1 R,3 R)-3-isopropyl-1-methyl-2-oxocyclopentyl]methylidene}-4-methylbenzenesulfonohydrazide. Acta Crystallogr E Crystallogr Commun 2015; 71:o99-o100. [PMID: 25878892 PMCID: PMC4384629 DOI: 10.1107/s2056989014026747] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 12/05/2014] [Indexed: 11/11/2022]
Abstract
The title compound, C17H24N2O3S, was synthesized in order to determine the relative configuration of the corresponding β-keto aldehyde. In the U-shaped molecule, the five-membered ring approximates an envelope with the methylene atom adjacent to the quaternary C atom being the flap. The dihedral angles between the four nearly coplanar atoms of the five-membered ring and the flap and the aromatic ring are 38.8 (4) and 22.9 (2)°, respectively. The bond angles around the S atom are in the range 104.11 (16)–119.95 (16)°. In the crystal, molecules are linked via N—H⋯O by hydrogen bonds, forming a chain along the a-axis direction.
Collapse
|
10
|
Wang Y, Guo X, Wu B, Wei D, Tang M. Mechanistic and stereoselectivity study for the reaction of trifluoropyruvates with arylpropenes catalyzed by a cationic Lewis acid rhodium complex. RSC Adv 2015. [DOI: 10.1039/c5ra21074g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The mechanism and stereoselectivity of a Lewis acid catalyzed carbonyl–ene reaction of trifluoropyruvates with arylpropenes have been investigated using a DFT method.
Collapse
Affiliation(s)
- Yang Wang
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Xiaokang Guo
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Bohua Wu
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Mingsheng Tang
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P. R. China
| |
Collapse
|