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101
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Ma B, Chu Z, Huang B, Liu Z, Liu L, Zhang J. Highlypara-Selective C−H Alkylation of Benzene Derivatives with 2,2,2-Trifluoroethyl α-Aryl-α-Diazoesters. Angew Chem Int Ed Engl 2017; 56:2749-2753. [DOI: 10.1002/anie.201611809] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Ben Ma
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road Shanghai 200062 China
| | - Zhaowei Chu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road Shanghai 200062 China
| | - Ben Huang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road Shanghai 200062 China
| | - Zhenli Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road Shanghai 200062 China
| | - Lu Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road Shanghai 200062 China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; School of Chemistry and Molecular Engineering; East China Normal University; 3663 North Zhongshan Road Shanghai 200062 China
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102
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Mahesh S, Vijaya Anand R. B(C6F5)3 catalysed reduction of para-quinone methides and fuchsones to access unsymmetrical diaryl- and triarylmethanes: elaboration to beclobrate. Org Biomol Chem 2017; 15:8393-8401. [DOI: 10.1039/c7ob02007d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An effective method for the synthesis of diaryl- and triarylmethane derivatives through a Lewis acid catalyzed reduction of para-quinone methides and fuchsones, respectively, using the Hantzsch ester as a hydride surrogate is described.
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Affiliation(s)
- Sriram Mahesh
- Department of Chemical Sciences
- Indian Institute of Science Education and Research (IISER) Mohali
- Manauli (PO)
- India
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences
- Indian Institute of Science Education and Research (IISER) Mohali
- Manauli (PO)
- India
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103
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Amézquita-Valencia M, Alper H. Palladium-Catalyzed Regioselective C-Benzylation via a Rearrangement Reaction: Access to Benzyl-Substituted Anilines. Chemistry 2016; 22:16774-16778. [PMID: 27617396 DOI: 10.1002/chem.201603941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Indexed: 01/01/2023]
Abstract
An unprecedented C-benzylation rearrangement reaction, catalyzed by palladium, is reported. The reaction proceeds by rearrangement leading to the direct synthesis of para or ortho benzyl-substituted N-methylanilines. The product is obtained in high regioselectivity, without the need to use a ligand for the catalytic process.
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Affiliation(s)
- Manuel Amézquita-Valencia
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N 6N5, Canada
| | - Howard Alper
- 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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104
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Croft RA, Mousseau JJ, Choi C, Bull JA. Structurally Divergent Lithium Catalyzed Friedel-Crafts Reactions on Oxetan-3-ols: Synthesis of 3,3-Diaryloxetanes and 2,3-Dihydrobenzofurans. Chemistry 2016; 22:16271-16276. [PMID: 27723135 PMCID: PMC5095816 DOI: 10.1002/chem.201604031] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Indexed: 01/02/2023]
Abstract
The first examples of 3,3-diaryloxetanes are prepared in a lithium-catalyzed and substrate dependent divergent Friedel-Crafts reaction. para-Selective Friedel-Crafts reactions of phenols using oxetan-3-ols afford 3,3-diaryloxetanes by displacement of the hydroxy group. These constitute new isosteres for benzophenones and diarylmethanes. Conversely, ortho-selective Friedel-Crafts reactions of phenols afford 3-aryl-3-hydroxymethyl-dihydrobenzofurans by tandem alkylation-ring-opening reactions; the outcome of the reaction diverging to structurally distinct products dependent on the substrate regioselectivity. Further reactivity of the oxetane products is demonstrated, suitable for incorporation into drug discovery efforts.
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Affiliation(s)
- Rosemary A Croft
- Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK
| | - James J Mousseau
- Pfizer Global Research and Development, 445 Eastern Point Rd., Groton, CT 06340, USA
| | - Chulho Choi
- Pfizer Global Research and Development, 445 Eastern Point Rd., Groton, CT 06340, USA
| | - James A Bull
- Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK.
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105
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Mo X, Hall DG. Dual Catalysis Using Boronic Acid and Chiral Amine: Acyclic Quaternary Carbons via Enantioselective Alkylation of Branched Aldehydes with Allylic Alcohols. J Am Chem Soc 2016; 138:10762-5. [DOI: 10.1021/jacs.6b06101] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xiaobin Mo
- Department
of Chemistry,
Centennial Centre for Interdisciplinary Science, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Dennis G. Hall
- Department
of Chemistry,
Centennial Centre for Interdisciplinary Science, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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106
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Ji YZ, Wang M, Li HJ, Liu Y, Wu YC. Direct Sulfination of Nonactivated Alcohols with Arylsulfonylmethyl Isocyanides. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600629] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yuan-Zhao Ji
- School of Marine Science and Technology; Harbin Institute of Technology; No. 2, Wenhuaxi Road 264209 Weihai P. R. China
| | - Meirong Wang
- School of Materials Science and Engineering; Harbin Institute of Technology; No. 2, Wenhuaxi Road 264209 Weihai P. R. China
| | - Hui-Jing Li
- School of Marine Science and Technology; Harbin Institute of Technology; No. 2, Wenhuaxi Road 264209 Weihai P. R. China
| | - Ying Liu
- School of Marine Science and Technology; Harbin Institute of Technology; No. 2, Wenhuaxi Road 264209 Weihai P. R. China
| | - Yan-Chao Wu
- School of Marine Science and Technology; Harbin Institute of Technology; No. 2, Wenhuaxi Road 264209 Weihai P. R. China
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institute of Chemistry Chinese Academy of Sciences; No.2, 1st North Street, Zhongguancun 100190 Beijing P. R. China
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107
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Zhu J, Pérez M, Stephan DW. C−C Coupling of Benzyl Fluorides Catalyzed by an Electrophilic Phosphonium Cation. Angew Chem Int Ed Engl 2016; 55:8448-51. [DOI: 10.1002/anie.201603627] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Jiangtao Zhu
- Department of Chemistry; University of Toronto; 80 St. George St Toronto Ontario M5S 3H6 Canada
| | - Manuel Pérez
- Department of Chemistry; University of Toronto; 80 St. George St Toronto Ontario M5S 3H6 Canada
| | - Douglas W. Stephan
- Department of Chemistry; University of Toronto; 80 St. George St Toronto Ontario M5S 3H6 Canada
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108
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Zhu J, Pérez M, Stephan DW. C−C Coupling of Benzyl Fluorides Catalyzed by an Electrophilic Phosphonium Cation. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603627] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jiangtao Zhu
- Department of Chemistry; University of Toronto; 80 St. George St Toronto Ontario M5S 3H6 Canada
| | - Manuel Pérez
- Department of Chemistry; University of Toronto; 80 St. George St Toronto Ontario M5S 3H6 Canada
| | - Douglas W. Stephan
- Department of Chemistry; University of Toronto; 80 St. George St Toronto Ontario M5S 3H6 Canada
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109
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Pallikonda G, Chakravarty M. Benzylic Phosphates in Friedel–Crafts Reactions with Activated and Unactivated Arenes: Access to Polyarylated Alkanes. J Org Chem 2016; 81:2135-42. [DOI: 10.1021/acs.joc.5b02441] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Gangaram Pallikonda
- Department of Chemistry, Birla Institute of Technology and Sciences, Pilani Hyderabad Campus, Jawahar
nagar, Shameerpet Mandal, Hyderabad, Telangana 500078, India
| | - Manab Chakravarty
- Department of Chemistry, Birla Institute of Technology and Sciences, Pilani Hyderabad Campus, Jawahar
nagar, Shameerpet Mandal, Hyderabad, Telangana 500078, India
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110
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Tian Y, Xu X, Zhang L, Qu J. Tetraphenylphosphonium Tetrafluoroborate/1,1,1,3,3,3-Hexafluoroisopropanol (Ph4PBF4/HFIP) Effecting Epoxide-Initiated Cation–Olefin Polycyclizations. Org Lett 2016; 18:268-71. [DOI: 10.1021/acs.orglett.5b03438] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yan Tian
- State Key Laboratory
and
Institute of Elemento-organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China
| | - Xin Xu
- State Key Laboratory
and
Institute of Elemento-organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China
| | - Lin Zhang
- State Key Laboratory
and
Institute of Elemento-organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China
| | - Jin Qu
- State Key Laboratory
and
Institute of Elemento-organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China
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111
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Hayama N, Azuma T, Kobayashi Y, Takemoto Y. Chiral Integrated Catalysts Composed of Bifunctional Thiourea and Arylboronic Acid: Asymmetric Aza-Michael Addition of α,β-Unsaturated Carboxylic Acids. Chem Pharm Bull (Tokyo) 2016; 64:704-17. [DOI: 10.1248/cpb.c15-00983] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Noboru Hayama
- Graduate School of Pharmaceutical Sciences, Kyoto University
| | - Takumi Azuma
- Graduate School of Pharmaceutical Sciences, Kyoto University
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112
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Liu J, Wang L, Wang X, Xu L, Hao Z, Xiao J. Fluorinated alcohol-mediated [4 + 3] cycloaddition reaction of indolyl alcohols with cyclopentadiene. Org Biomol Chem 2016; 14:11510-11517. [DOI: 10.1039/c6ob01953f] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper describes a catalyst- and additive-free, [4 + 3] cycloaddition reaction of 3-indolylmethanols with cyclopentadiene in HFIP, producing cyclohepta[b]indole derivatives in high yields and with wide substrate scope.
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Affiliation(s)
- Jian Liu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Xiaoxiao Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Lubin Xu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Zhihui Hao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Jian Xiao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
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113
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Hu F, Patel M, Luo F, Flach C, Mendelsohn R, Garfunkel E, He H, Szostak M. Graphene-Catalyzed Direct Friedel–Crafts Alkylation Reactions: Mechanism, Selectivity, and Synthetic Utility. J Am Chem Soc 2015; 137:14473-80. [DOI: 10.1021/jacs.5b09636] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Feng Hu
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Mehulkumar Patel
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Feixiang Luo
- Department
of Chemistry and Chemical Biology, Rutgers University, 610 Taylor
Rd, Piscataway, New Jersey 08854, United States
| | - Carol Flach
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Richard Mendelsohn
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Eric Garfunkel
- Department
of Chemistry and Chemical Biology, Rutgers University, 610 Taylor
Rd, Piscataway, New Jersey 08854, United States
| | - Huixin He
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Michal Szostak
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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