1
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Wang N, Xu HJ, Li T, Ye LW, Zhou B. Copper-Catalyzed [2 + 2] Cyclization/Ring Expansion of Ene-Ynamides: Construction of Medium- and Large-Sized Rings. Org Lett 2024; 26:3861-3866. [PMID: 38679881 DOI: 10.1021/acs.orglett.4c01013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
Catalytic cyclization of enynes is an efficient approach for the preparation of cyclic compounds, and a large variety of four- to six-membered rings could be synthesized using this method. However, it has been rarely employed for the construction of medium- and large-sized rings. Herein, we describe a copper-catalyzed cycloisomerization of ene-ynamides through a [2 + 2] cyclization/electrocyclic ring opening cascade, leading to the atom-economical assembly of indole-fused medium- and large-sized rings in moderate to excellent yields under mild reaction conditions. Importantly, the synthetic utility of this reaction was demonstrated by the convenient synthesis of iprindole.
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Affiliation(s)
- Nan Wang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Hao-Jin Xu
- Key Laboratory of Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Ting Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Long-Wu Ye
- Key Laboratory of Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Bo Zhou
- Key Laboratory of Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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2
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Zhao QS, Xu GQ, Xu JT, Wang ZY, Xu PF. A lutidine-promoted photoredox catalytic atom-transfer radical cyclization reaction for the synthesis of 4-bromo-3,3-dialkyl-octahydro-indol-2-ones. Chem Commun (Camb) 2020; 56:2206-2209. [PMID: 31976501 DOI: 10.1039/c9cc09876c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reported herein is a visible-light-catalyzed photoredox atom-transfer radical cyclization (ATRC) halo-alkylation of 1,6-dienes with α-halo-ketones as the ATRC reagent. This process exhibits high atom economy, high step economy, and high redox economy, which can directly construct a 4-bromo-3,3-dialkyl-octahydro-indol-2-one core under mild conditions in one pot, and lutidine is found to be the key promoter for this ATRC process.
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Affiliation(s)
- Quan-Sheng Zhao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China. and Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
| | - Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Ji-Tao Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Zhu-Yin Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
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3
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Shen MH, Zhang YM, Jiang C, Xu HD, Xu D. Ag-Catalyzed cycloisomerization of 1,6-enynamide: an intramolecular type II Alder-ene reaction. Org Chem Front 2020. [DOI: 10.1039/c9qo01258c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unusual type II Alder-ene cycloisomerization of 1,6-enynamide to fused bicyclic N-heterocycles is achieved by silver catalysis. 6-Endo-trig cyclization of a keteneiminium silver intermediate is proposed as the key step.
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Affiliation(s)
- Mei-Hua Shen
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou 213164
- China
| | - Yu-Mei Zhang
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou 213164
- China
| | - Chun Jiang
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou 213164
- China
| | - Hua-Dong Xu
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou 213164
- China
| | - Defeng Xu
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou 213164
- China
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4
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Ganesh Kumar M, Veeresh K, Nalawade SA, Nithun RV, Gopi HN. Direct Transformation of N-Protected α,β-Unsaturated γ-Amino Amides into γ-Lactams through a Base-Mediated Molecular Rearrangement. J Org Chem 2019; 84:15145-15153. [PMID: 31657563 DOI: 10.1021/acs.joc.9b01936] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Here, we are reporting a single-step transformation of N-protected α,β-unsaturated γ-amino amides into 5,5-disubstituted γ-lactams through a base-mediated new molecular rearrangement. In contrast to the known N- to C(O) cyclization of saturated γ-amino acids into corresponding γ-lactams, the new rearrangement involves the cyclization between N-terminal Cγ- to C-terminal amide N. The cyclization process was initiated by the migration of double bond from α,β → β,γ position. The enamine-imine tautomerization of the new β,γ-double bond and subsequent 5-exo-trig cyclization of terminal amide leads to the formation of N-protected 5,5-disubstituted γ-lactam. The structures of various γ-lactams obtained from the rearrangement were studied in single crystals. Overall, the results reported here demonstrate the facile and single-step transformation of N-protected α,β-unsaturated γ-amino amides into γ-lactams and provided an excellent opportunity to construct small-molecule peptidomimetics.
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Affiliation(s)
- Mothukuri Ganesh Kumar
- Department of Chemistry , Indian Institute of Science Education and Research , Dr. Homi Bhabha Road , Pune 411 008 , India
| | - Kuruva Veeresh
- Department of Chemistry , Indian Institute of Science Education and Research , Dr. Homi Bhabha Road , Pune 411 008 , India
| | - Sachin A Nalawade
- Department of Chemistry , Indian Institute of Science Education and Research , Dr. Homi Bhabha Road , Pune 411 008 , India
| | - Raj V Nithun
- Department of Chemistry , Indian Institute of Science Education and Research , Dr. Homi Bhabha Road , Pune 411 008 , India
| | - Hosahudya N Gopi
- Department of Chemistry , Indian Institute of Science Education and Research , Dr. Homi Bhabha Road , Pune 411 008 , India
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5
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Hong Y, Santhoshkumar R, Cheng C. Fe‐catalyzed hydrohalogenative cyclization of cyclohexadienone‐containing enynes. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201900292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ya‐Chun Hong
- Department of ChemistryNational Tsing Hua University Hsinchu Taiwan
| | | | - Chien‐Hong Cheng
- Department of ChemistryNational Tsing Hua University Hsinchu Taiwan
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6
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Lin H, Chiang T, Wu R, Chang Y, Wang H, Liu S, Yeh MP. Synthesis of Halogenated Cyclic Enamines from Cyclic
N‐
2‐En‐4‐ynyl‐
N
‐1‐ynylamides and
N
‐Propargyl‐
N
‐1‐ynylamides via a Tandem Iron Halide Promoted N‐to‐C Shift‐Aza‐Prins Cyclization Sequence. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Hsin‐Hui Lin
- Department of ChemistryNational Taiwan Normal University 88 Ding-Jou Road, Sec. 4 Taipei 11677 Taiwan, R.O.C
| | - Tai‐Ching Chiang
- Department of ChemistryNational Taiwan Normal University 88 Ding-Jou Road, Sec. 4 Taipei 11677 Taiwan, R.O.C
| | - Rong‐Xuan Wu
- Department of ChemistryNational Taiwan Normal University 88 Ding-Jou Road, Sec. 4 Taipei 11677 Taiwan, R.O.C
| | - Yi‐Mei Chang
- Department of ChemistryNational Taiwan Normal University 88 Ding-Jou Road, Sec. 4 Taipei 11677 Taiwan, R.O.C
| | - Hao‐Wen Wang
- Department of ChemistryNational Taiwan Normal University 88 Ding-Jou Road, Sec. 4 Taipei 11677 Taiwan, R.O.C
| | - Ssu‐Ting Liu
- Department of ChemistryNational Taiwan Normal University 88 Ding-Jou Road, Sec. 4 Taipei 11677 Taiwan, R.O.C
| | - Ming‐Chang P. Yeh
- Department of ChemistryNational Taiwan Normal University 88 Ding-Jou Road, Sec. 4 Taipei 11677 Taiwan, R.O.C
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7
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Kawamura S, Dosei K, Valverde E, Ushida K, Sodeoka M. N-Heterocycle-Forming Amino/Carboperfluoroalkylations of Aminoalkenes by Using Perfluoro Acid Anhydrides: Mechanistic Studies and Applications Directed Toward Perfluoroalkylated Compound Libraries. J Org Chem 2017; 82:12539-12553. [PMID: 29052416 DOI: 10.1021/acs.joc.7b02307] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work describes a practical and efficient method for synthesizing a diverse array of perfluoroalkylated amines, including N-heterocycles, to afford perfluoroalkylated chemical libraries as potential sources of drug candidates, agrochemicals, and probe molecules for chemical-biology research. Perfluoro acid anhydrides, which are commonly used in organic synthesis, were employed as a perfluoroalkyl source for intramolecular amino- and carbo-perfluoroalkylations of aminoalkenes, affording perfluoroalkylated N-heterocycles, including: aziridines, pyrrolidines, benzothiazinane dioxides, indolines, and hydroisoquinolinones. Diacyl peroxides were generated in situ from the perfluoro acid anhydrides with urea·H2O2, and allowed to react with aminoalkenes in the presence of copper catalyst to control the product selectivity between amino- and carbo-perfluoroalkylations. To illustrate the synthetic utility of bench-stable trifluoromethylated aziridine, which was prepared on a gram scale, we used it to synthesize a wide variety of trifluoromethylated amines including complex molecules, such as trifluoromethylated tetrahydroharmine and spiroindolone. A mechanistic study of the role of the copper catalyst in the aminotrifluoromethylation of allylamine suggested that Cu(I) accelerates CF3 radical formation via decomposition of diacyl peroxide, which appears to be the turnover-limiting step, while Cu(II) controls the product selectivity.
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Affiliation(s)
- Shintaro Kawamura
- Center for Sustainable Resource Science, RIKEN , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Synthetic Organic Chemistry Laboratory, RIKEN , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Kento Dosei
- Synthetic Organic Chemistry Laboratory, RIKEN , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Department of Chemistry, School of Science, Kitasato University , 1-15-1 Kitasato, Minami-ku, Sagamihara 252-0373, Japan
| | - Elena Valverde
- Synthetic Organic Chemistry Laboratory, RIKEN , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Kiminori Ushida
- Department of Chemistry, School of Science, Kitasato University , 1-15-1 Kitasato, Minami-ku, Sagamihara 252-0373, Japan
| | - Mikiko Sodeoka
- Center for Sustainable Resource Science, RIKEN , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Synthetic Organic Chemistry Laboratory, RIKEN , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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8
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Tung PT, Zhong CZ, Chien TC, Yeh MCP. Synthesis of Spirolactams and Fused Bicyclic Lactams via Acid-Promoted Cyclolactamization of (Ethynyl(tosyl)amino)methyl-Tethered Cyclohex-2-enols. J Org Chem 2017; 82:11543-11557. [DOI: 10.1021/acs.joc.7b02158] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Po-Ting Tung
- Department of Chemistry, National Taiwan Normal University, 88 Ding-Jou Road, Section 4, Taipei 11677, Taiwan, Republic of China
| | - Chang-Zhi Zhong
- Department of Chemistry, National Taiwan Normal University, 88 Ding-Jou Road, Section 4, Taipei 11677, Taiwan, Republic of China
| | - Tzu-Chiang Chien
- Department of Chemistry, National Taiwan Normal University, 88 Ding-Jou Road, Section 4, Taipei 11677, Taiwan, Republic of China
| | - Ming-Chang P. Yeh
- Department of Chemistry, National Taiwan Normal University, 88 Ding-Jou Road, Section 4, Taipei 11677, Taiwan, Republic of China
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9
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Yeh MCP, Chang YM, Lin HH. Stereoselective Synthesis of 7-(E
)-Arylidene-2-chloro-6-azabicyclo[3.2.1]octanes via
Aluminum Chloride-Promoted Cyclization/Chlorination of Six-Membered Ring 3-Enynamides. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700271] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ming-Chang P. Yeh
- Department of Chemistry; National Taiwan Normal University; 88 Ding-Jou Road, Sec. 4 Taipei 11677 Taiwan, R.O.C
| | - Yi-Mei Chang
- Department of Chemistry; National Taiwan Normal University; 88 Ding-Jou Road, Sec. 4 Taipei 11677 Taiwan, R.O.C
| | - Hsin-Hui Lin
- Department of Chemistry; National Taiwan Normal University; 88 Ding-Jou Road, Sec. 4 Taipei 11677 Taiwan, R.O.C
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10
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Jansana S, Coussanes G, Diaba F, Bonjoch J. Radical Cyclizations in the Synthesis of 3‐Methyl‐
cis
‐octahydroindol‐5‐ones. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700086] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sergi Jansana
- Laboratori de Química Orgànica Facultat de Farmàcia IBUB Universitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
| | - Guilhem Coussanes
- Laboratori de Química Orgànica Facultat de Farmàcia IBUB Universitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
| | - Faïza Diaba
- Laboratori de Química Orgànica Facultat de Farmàcia IBUB Universitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
| | - Josep Bonjoch
- Laboratori de Química Orgànica Facultat de Farmàcia IBUB Universitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
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11
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Kalaitzakis D, Triantafyllakis M, Ioannou GI, Vassilikogiannakis G. One-Pot Transformation of Simple Furans into Octahydroindole Scaffolds. Angew Chem Int Ed Engl 2017; 56:4020-4023. [DOI: 10.1002/anie.201700620] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Indexed: 02/02/2023]
Affiliation(s)
- Dimitris Kalaitzakis
- Department of Chemistry; University of Crete; Vasilika Vouton 71003 Iraklion Crete Greece
| | - Myron Triantafyllakis
- Department of Chemistry; University of Crete; Vasilika Vouton 71003 Iraklion Crete Greece
| | - Georgios I. Ioannou
- Department of Chemistry; University of Crete; Vasilika Vouton 71003 Iraklion Crete Greece
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12
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Kalaitzakis D, Triantafyllakis M, Ioannou GI, Vassilikogiannakis G. One-Pot Transformation of Simple Furans into Octahydroindole Scaffolds. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700620] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Dimitris Kalaitzakis
- Department of Chemistry; University of Crete; Vasilika Vouton 71003 Iraklion Crete Greece
| | - Myron Triantafyllakis
- Department of Chemistry; University of Crete; Vasilika Vouton 71003 Iraklion Crete Greece
| | - Georgios I. Ioannou
- Department of Chemistry; University of Crete; Vasilika Vouton 71003 Iraklion Crete Greece
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13
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Zhong CZ, Tung PT, Chao TH, Yeh MCP. Gold-Catalyzed Stereoselective Synthesis of Bicyclic Lactams and Ketones from N-Tosylynamidomethyl-Tethered Cyclohexenes. J Org Chem 2016; 82:481-501. [PMID: 27966957 DOI: 10.1021/acs.joc.6b02479] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Six-membered ring 3-enynamides underwent cycloisomerization in the presence of a catalytic amount of a gold(I) complex delivering mainly 4-azatricyclo[4.3.1.03,10]dec-2-ene derivatives and dibenz[cd,f]indole derivatives as the minor products under mild reaction conditions. Upon exposure to air, most aryl-substituted azatricycles led to bicyclic γ-lactams, while the ortho-tolyl- or alkyl-substituted azatricycles provided the corresponding bicyclic γ-lactams after oxidation with osmium tetraoxide and N-methylmorpholine-N-oxide. Under acidic conditions, the ortho-tolyl- or alkyl-substituted azatricycles were further transformed into 5-N-tosylaminomethyl-tethered bicyclo[4.2.0]octan-7-ones. The gold(I)-catalyzed tandem cycloisomerization/oxidation reaction also provided a new route for the synthesis of bridged bicyclic δ-lactams from six-membered ring 4-enynamides. The mild reaction conditions allowed the synthesis of a range of bicyclic γ- and δ-lactams and N-tosylaminomethyl-tethered bicyclo[4.2.0]octan-7-ones with high diastereoselectivities.
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Affiliation(s)
- Chang-Zhi Zhong
- Department of Chemistry, National Taiwan Normal University , 88 Ding-Jou Road, Section 4, Taipei 11677, Taiwan, Republic of China
| | - Po-Ting Tung
- Department of Chemistry, National Taiwan Normal University , 88 Ding-Jou Road, Section 4, Taipei 11677, Taiwan, Republic of China
| | - Tsung-Han Chao
- Department of Chemistry, National Taiwan Normal University , 88 Ding-Jou Road, Section 4, Taipei 11677, Taiwan, Republic of China
| | - Ming-Chang P Yeh
- Department of Chemistry, National Taiwan Normal University , 88 Ding-Jou Road, Section 4, Taipei 11677, Taiwan, Republic of China
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14
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Xuan J, Daniliuc CG, Studer A. Construction of Polycyclic γ-Lactams and Related Heterocycles via Electron Catalysis. Org Lett 2016; 18:6372-6375. [PMID: 27978670 PMCID: PMC5168651 DOI: 10.1021/acs.orglett.6b03267] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
![]()
Cascade radical cyclization of 1,6-enynes
for the construction
of biologically important polycyclic γ-lactams and related heterocycles
is reported. In these radical cascade processes, three new C–C
bonds are formed and transition metals are not required to run these
sequences. The mild reaction conditions, broad substrate scope, and
the importance of the heterocyclic products render the approach valuable.
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Affiliation(s)
- Jun Xuan
- Department of Chemistry, Anhui University , Hefei, Anhui 230601, China.,Organisch-Chemisches Institut, Westfälische Wilhelms-Universität , Corrensstraβe 40, 48149 Münster, Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität , Corrensstraβe 40, 48149 Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität , Corrensstraβe 40, 48149 Münster, Germany
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