51
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Alyabyev SB, Beletskaya IP. Gold as a catalyst. Part II. Alkynes in the reactions of carbon–carbon bond formation. RUSSIAN CHEMICAL REVIEWS 2018. [DOI: 10.1070/rcr4815] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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52
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Pradhan TR, Kim HW, Park JK. Harnessing the Polarizability of Conjugated Alkynes toward [2 + 2] Cycloaddition, Alkenylation, and Ring Expansion of Indoles. Org Lett 2018; 20:5286-5290. [PMID: 30141335 DOI: 10.1021/acs.orglett.8b02230] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Reported is the utilization of electronically biased conjugated alkynes in the development of highly diastereo- and regioselective dearomative [2 + 2] cycloadditions, alkenylations, and ring expansions of electron-rich indoles. Regioselective protonations of cross- and linear-conjugated alkynes were found to be crucial for accessing various cyclobutene-fused indoline and alkenylated indole derivatives. Furthermore, the facile ring expansion of [2 + 2] keto adducts, which were successfully synthesized from ynones, provided 1 H-benzo[ b]azepine scaffolds.
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Affiliation(s)
- Tapas R Pradhan
- The Department of Chemistry and Chemistry Institute of Functional Materials , Pusan National University , Busan 46241 , Korea
| | - Hong Won Kim
- The Department of Chemistry and Chemistry Institute of Functional Materials , Pusan National University , Busan 46241 , Korea
| | - Jin Kyoon Park
- The Department of Chemistry and Chemistry Institute of Functional Materials , Pusan National University , Busan 46241 , Korea
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53
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Su X, Chen B, Wang S, Chen H, Chen C. Atom- and Step-Efficient Construction of Five-Membered Carbocycles with Alkenes and Alkynes Catalyzed by AgSbF6. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02448] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Xiang Su
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education, MOE), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Bifeng Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education, MOE), Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Shaohong Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences. Beijing, 100190, China
| | - Hui Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences. Beijing, 100190, China
| | - Chao Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education, MOE), Department of Chemistry, Tsinghua University, Beijing, 100084, China
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54
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Li H, Hao WJ, Wang M, Qin X, Tu SJ, Zhou P, Li G, Wang J, Jiang B. Catalytic Double [2 + 2] Cycloaddition Relay Enabled C-C Triple Bond Cleavage of Yne-Allenones. Org Lett 2018; 20:4362-4366. [PMID: 29989832 DOI: 10.1021/acs.orglett.8b01841] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
An unusual catalytic double [2 + 2] cycloaddition relay reaction of yne-allenones with unactivated alkenes and alkynes has been achieved, which enabled C-C triple-bond cleavage to access more than 60 examples of functionalized phenanthren-9-ols with generally good yields. This reaction provides a regioselective and practical method for the construction of carbocyclic ring systems with a high degree of functional group compatibility. Aside from surveying the scope of this transformation, mechanistic details of this process are provided by conducting systematic theoretical calculations.
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Affiliation(s)
- Heng Li
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials , Jiangsu Normal University , Xuzhou 221116 , P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials , Jiangsu Normal University , Xuzhou 221116 , P. R. China
| | - Mian Wang
- Medical College , Guangxi University , Nanning 530004 , P.R. China
| | - Xue Qin
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials , Jiangsu Normal University , Xuzhou 221116 , P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials , Jiangsu Normal University , Xuzhou 221116 , P. R. China
| | - Peng Zhou
- Institute of Chemistry & BioMedical Sciences, Nanjing University , Nanjing 210093 , P. R. China
| | - Guigen Li
- Institute of Chemistry & BioMedical Sciences, Nanjing University , Nanjing 210093 , P. R. China.,Department of Chemistry and Biochemistry , Texas Tech University , Lubbock , Texas 79409-1061 , United States
| | - Jianyi Wang
- Medical College , Guangxi University , Nanning 530004 , P.R. China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials , Jiangsu Normal University , Xuzhou 221116 , P. R. China
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55
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Liao S, Porta A, Cheng X, Ma X, Zanoni G, Zhang L. Bifunctional Ligand Enables Efficient Gold-Catalyzed Hydroalkenylation of Propargylic Alcohol. Angew Chem Int Ed Engl 2018; 57:8250-8254. [PMID: 29704310 PMCID: PMC6592274 DOI: 10.1002/anie.201802533] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/23/2018] [Indexed: 11/10/2022]
Abstract
Using the previously designed biphenyl-2-ylphosphine ligand, featuring a remote tertiary amino group, the first gold-catalyzed intermolecular hydroalkenylation of alkynes has been developed. Synthetically valuable conjugated dienyl alcohols are formed in moderate to good yields. A range of alkenyltrifluoroborates are allowed as the alkenyl donor, and no erosion of alkene geometry and/or the propargylic configuration are detected. DFT calculations confirm the critical role of the remote basic group in the ligand as a general-base catalyst for promoting this novel gold catalysis with good efficiency.
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Affiliation(s)
- Shengrong Liao
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, CAS, Guangzhou, P. R. China
- Department of Chemistry and Biochemistry, UCSB, Santa Barbara, CA, 93106, USA
| | - Alessio Porta
- Dept of Chem., Univ. of Pavia, Viale Taramelli, 10, 27100, Pavia, Italy
| | - Xinpeng Cheng
- Department of Chemistry and Biochemistry, UCSB, Santa Barbara, CA, 93106, USA
| | - Xu Ma
- Department of Chemistry and Biochemistry, UCSB, Santa Barbara, CA, 93106, USA
| | - Giuseppe Zanoni
- Dept of Chem., Univ. of Pavia, Viale Taramelli, 10, 27100, Pavia, Italy
| | - Liming Zhang
- Department of Chemistry and Biochemistry, UCSB, Santa Barbara, CA, 93106, USA
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56
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Liao S, Porta A, Cheng X, Ma X, Zanoni G, Zhang L. Bifunctional Ligand Enables Efficient Gold‐Catalyzed Hydroalkenylation of Propargylic Alcohol. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802533] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shengrong Liao
- Key Laboratory of Tropical Marine Bio-resources and EcologySouth China Sea Institute of Oceanology, CAS Guangzhou P. R. China
- Department of Chemistry and BiochemistryUCSB Santa Barbara CA 93106 USA
| | - Alessio Porta
- Dept of Chem.Univ. of Pavia Viale Taramelli, 10 27100 Pavia Italy
| | - Xinpeng Cheng
- Department of Chemistry and BiochemistryUCSB Santa Barbara CA 93106 USA
| | - Xu Ma
- Department of Chemistry and BiochemistryUCSB Santa Barbara CA 93106 USA
| | - Giuseppe Zanoni
- Dept of Chem.Univ. of Pavia Viale Taramelli, 10 27100 Pavia Italy
| | - Liming Zhang
- Department of Chemistry and BiochemistryUCSB Santa Barbara CA 93106 USA
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57
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Scherpf T, Schwarz C, Scharf LT, Zur JA, Helbig A, Gessner VH. Ylide-Functionalized Phosphines: Strong Donor Ligands for Homogeneous Catalysis. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805372] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Thorsten Scherpf
- Lehrstuhl für Anorganische Chemie II; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstrasse 150 44801 Bochum Germany
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Christopher Schwarz
- Lehrstuhl für Anorganische Chemie II; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Lennart T. Scharf
- Lehrstuhl für Anorganische Chemie II; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Jana-Alina Zur
- Lehrstuhl für Anorganische Chemie II; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Andreas Helbig
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Viktoria H. Gessner
- Lehrstuhl für Anorganische Chemie II; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstrasse 150 44801 Bochum Germany
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
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58
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Scherpf T, Schwarz C, Scharf LT, Zur JA, Helbig A, Gessner VH. Ylide-Functionalized Phosphines: Strong Donor Ligands for Homogeneous Catalysis. Angew Chem Int Ed Engl 2018; 57:12859-12864. [PMID: 29862622 PMCID: PMC6174943 DOI: 10.1002/anie.201805372] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Indexed: 12/25/2022]
Abstract
Phosphines are important ligands in homogenous catalysis and have been crucial for many advances, such as in cross‐coupling, hydrofunctionalization, or hydrogenation reactions. Herein we report the synthesis and application of a novel class of phosphines bearing ylide substituents. These phosphines are easily accessible via different synthetic routes from commercially available starting materials. Owing to the extra donation from the ylide group to the phosphorus center the ligands are unusually electron‐rich and can thus function as strong electron donors. The donor capacity surpasses that of commonly used phosphines and carbenes and can easily be tuned by changing the substitution pattern at the ylidic carbon atom. The huge potential of ylide‐functionalized phosphines in catalysis is demonstrated by their use in gold catalysis. Excellent performance at low catalyst loadings under mild reaction conditions is thus seen in different types of transformations.
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Affiliation(s)
- Thorsten Scherpf
- Lehrstuhl für Anorganische Chemie II, Fakultät für Chemie und Biochemie, Ruhr-Universität Bochum, Universitätsstrasse 150, 44801, Bochum, Germany.,Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Christopher Schwarz
- Lehrstuhl für Anorganische Chemie II, Fakultät für Chemie und Biochemie, Ruhr-Universität Bochum, Universitätsstrasse 150, 44801, Bochum, Germany
| | - Lennart T Scharf
- Lehrstuhl für Anorganische Chemie II, Fakultät für Chemie und Biochemie, Ruhr-Universität Bochum, Universitätsstrasse 150, 44801, Bochum, Germany
| | - Jana-Alina Zur
- Lehrstuhl für Anorganische Chemie II, Fakultät für Chemie und Biochemie, Ruhr-Universität Bochum, Universitätsstrasse 150, 44801, Bochum, Germany
| | - Andreas Helbig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Viktoria H Gessner
- Lehrstuhl für Anorganische Chemie II, Fakultät für Chemie und Biochemie, Ruhr-Universität Bochum, Universitätsstrasse 150, 44801, Bochum, Germany.,Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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59
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Elena de Orbe M, Echavarren AM. Broadening the Scope of the Gold-Catalyzed [2+2] Cycloaddition Reaction: Synthesis of Vinylcyclobutenes and Further Transformations. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800170] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- M. Elena de Orbe
- Institute of Chemical Research of Catalonia (ICIQ); Barcelona Institute of Science and Technology; Av. Països Catalans 16 43007 Tarragona Spain
| | - Antonio M. Echavarren
- Institute of Chemical Research of Catalonia (ICIQ); Barcelona Institute of Science and Technology; Av. Països Catalans 16 43007 Tarragona Spain
- Departament de Química Orgànica i Analítica; Universitat Rovira i Virgili; C/ Marcel. lí Domingo s/n 43007 Tarragona Spain
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60
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Gold(I)-Catalysis for the Synthesis of Terpenoids: From Intramolecular Cascades to Intermolecular Cycloadditions. Isr J Chem 2018. [DOI: 10.1002/ijch.201800006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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61
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Bai YB, Luo Z, Wang Y, Gao JM, Zhang L. Au-Catalyzed Intermolecular [2+2] Cycloadditions between Chloroalkynes and Unactivated Alkenes. J Am Chem Soc 2018; 140:5860-5865. [PMID: 29618202 PMCID: PMC6488029 DOI: 10.1021/jacs.8b01813] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The [2+2] cycloaddition is a versatile strategy for the synthesis of strained cyclobutenes of high synthetic value. In this study, two efficient intermolecular [2+2] cycloadditions between two different types of chloroalkynes and unactivated alkene are realized with gold catalysis. Of significance is that the reaction works with challenging monosubstituted unactivated alkenes, which is unprecedented in gold catalysis and scarcely documented in other metal-catalyzed/promoted reactions; moreover, the reaction exhibits excellent regioselectivities, which are much better than those reported in literature. With 1,2-disubstituted unactivated alkenes, the reaction is largely stereospecific. The cyclobutene products can be prepared in nearly gram scale and readily undergo further reactions including various cross-coupling reactions using the C(sp2)-Cl and/or C(sp2)-SPh bond, which in turn substantially broaden the scope of accessible cyclobutenes and enhance the synthetic utility of this bimolecular reaction.
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Affiliation(s)
- Yu-Bin Bai
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zaigang Luo
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Yuguang Wang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Liming Zhang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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62
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Zang W, Wei Y, Shi M. Gold(i) catalyzed cascade cyclization: intramolecular two-fold nucleophilic addition to vinylidenecyclopropanes (VDCPs). Org Chem Front 2018. [DOI: 10.1039/c7qo00722a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A gold catalyzed cascade cyclization of vinylidenecyclopropanes to give spiro[cyclopenta[a]naphthalene-1,1′-cyclopropanes] in moderate to good yields upon gold catalysis through a two-fold intramolecular nucleophilic addition.
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Affiliation(s)
- Wenqing Zang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Shanghai 200032
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Shanghai 200032
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Shanghai 200032
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63
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Jiang B, Wei Y, Shi M. Gold- and silver-catalyzed intramolecular annulation and rearrangement of aniline-linked 1,6-enynes containing methylenecyclopropanes. Org Chem Front 2018. [DOI: 10.1039/c8qo00358k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A new synthetic approach for the construction of 1,2-dihydroquinolines having a methylenecyclopropane moiety or a cyclobutene moiety has been developed from gold- and silver-catalyzed annulation of N-tethered 1,6-enynes containing methylenecyclopropanes.
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Affiliation(s)
- Bo Jiang
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- University of Chinese Academy of Science
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- University of Chinese Academy of Science
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- University of Chinese Academy of Science
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
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64
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Iwai T, Ueno M, Okochi H, Sawamura M. Synthesis of Cyclobutene-Fused Eight-Membered Carbocycles through Gold-Catalyzed Intramolecular Enyne [2+2] Cycloaddition. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701193] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Tomohiro Iwai
- Department of Chemistry, Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
| | - Masahiro Ueno
- Department of Chemistry, Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
| | - Hiori Okochi
- Department of Chemistry, Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
| | - Masaya Sawamura
- Department of Chemistry, Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
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65
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Chen C, Chen X, Zhang X, Wang S, Rao W, Chan PWH. Gold‐Catalyzed Dehydrogenative Cycloisomerization of 1,4‐Enyne Esters to 3,5‐Disubstituted Phenol Derivatives. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701068] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Cuili Chen
- Jiangsu Key Laboratory of Biomass-based Green Fuels and Chemicals, College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Xianxiao Chen
- Jiangsu Key Laboratory of Biomass-based Green Fuels and Chemicals, College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Xiaoxiang Zhang
- Jiangsu Key Laboratory of Biomass-based Green Fuels and Chemicals, College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Shifa Wang
- Jiangsu Key Laboratory of Biomass-based Green Fuels and Chemicals, College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Weidong Rao
- Jiangsu Key Laboratory of Biomass-based Green Fuels and Chemicals, College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Philip Wai Hong Chan
- School of Chemistry Monash University Clayton, Victoria 3800 Australia
- Department of Chemistry University of Warwick Coventry CV4 7AL U.K
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66
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Jiao Z, Shi Q, Zhou JS. Asymmetric Intermolecular Heck Reaction of Propargylic Acetates and Cycloalkenes to Access Fused Cyclobutenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708435] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zhiwei Jiao
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Qi Shi
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Jianrong Steve Zhou
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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67
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Jiao Z, Shi Q, Zhou JS. Asymmetric Intermolecular Heck Reaction of Propargylic Acetates and Cycloalkenes to Access Fused Cyclobutenes. Angew Chem Int Ed Engl 2017; 56:14567-14571. [DOI: 10.1002/anie.201708435] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 09/28/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Zhiwei Jiao
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Qi Shi
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Jianrong Steve Zhou
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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68
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García-Morales C, Ranieri B, Escofet I, López-Suarez L, Obradors C, Konovalov AI, Echavarren AM. Enantioselective Synthesis of Cyclobutenes by Intermolecular [2+2] Cycloaddition with Non-C 2 Symmetric Digold Catalysts. J Am Chem Soc 2017; 139:13628-13631. [PMID: 28922911 PMCID: PMC5679663 DOI: 10.1021/jacs.7b07651] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Indexed: 01/12/2023]
Abstract
The enantioselective intermolecular gold(I)-catalyzed [2+2] cycloaddition of terminal alkynes and alkenes has been achieved using non-C2-chiral Josiphos digold(I) complexes as catalysts, by the formation of the monocationic complex. This new approach has been applied to the enantioselective total synthesis of rumphellaone A.
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Affiliation(s)
- Cristina García-Morales
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Beatrice Ranieri
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Imma Escofet
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Laura López-Suarez
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Carla Obradors
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Andrey I. Konovalov
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Antonio M. Echavarren
- Institute of Chemical
Research of Catalonia (ICIQ), Barcelona Institute of
Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
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69
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Shen L, Zhao K, Doitomi K, Ganguly R, Li YX, Shen ZL, Hirao H, Loh TP. Lewis Acid-Catalyzed Selective [2 + 2]-Cycloaddition and Dearomatizing Cascade Reaction of Aryl Alkynes with Acrylates. J Am Chem Soc 2017; 139:13570-13578. [PMID: 28880536 DOI: 10.1021/jacs.7b07997] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Combined Lewis acid, consisting of two or more Lewis acids, sometimes shows unique catalytic ability, and it may promote reactions which could not be catalyzed by any of the Lewis acids solely. On the other hand, the development of efficient methods for the facile synthesis of cyclobutenes and densely functionalized decalins is an attractive target for synthetic chemists due to their versatile synthetic utilities and widespread occurrence in natural products. Herein, we wish to report an efficient method for the assembly of cyclobutenes and densely functionalized decalin skeletons through In(tfacac)3-TMSBr catalyzed selective [2 + 2]-cycloaddition and dearomatizing cascade reaction of aryl alkynes with acrylates with high chemo- and stereoselectivity. The obtained cyclobutene could be easily converted into cyclobutane as well as synthetically useful 1,4- and 1,5-diketones with high chemo- and stereoselectivity. On the basis of mechanistic studies, plausible reaction mechanisms were proposed for both the [2 + 2]-cycloaddition and the dearomatizing cascade reaction. Finally, the computational studies of reaction mechanisms were conducted, and the results suggest that the combined Lewis acid could efficiently promote both reactions.
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Affiliation(s)
- Liang Shen
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
| | - Kai Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University , Nanjing, Jiangsu, P. R. China , 210009.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
| | - Kazuki Doitomi
- Department of Chemistry, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
| | - Yong-Xin Li
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
| | - Zhi-Liang Shen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University , Nanjing, Jiangsu, P. R. China , 210009.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
| | - Hajime Hirao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371.,Department of Chemistry, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University , Nanjing, Jiangsu, P. R. China , 210009.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore , 637371
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70
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Inagaki F, Nakazawa K, Maeda K, Koseki T, Mukai C. Substituent Effects in the Cyclization of Yne-Diols Catalyzed by Gold Complexes Featuring L2/Z-Type Diphosphinoborane Ligands. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00369] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fuyuhiko Inagaki
- Division of Pharmaceutical Sciences,
Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Kenta Nakazawa
- Division of Pharmaceutical Sciences,
Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Kakeru Maeda
- Division of Pharmaceutical Sciences,
Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Tomoya Koseki
- Division of Pharmaceutical Sciences,
Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Chisato Mukai
- Division of Pharmaceutical Sciences,
Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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71
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de Orbe ME, Amenós L, Kirillova MS, Wang Y, López-Carrillo V, Maseras F, Echavarren AM. Cyclobutene vs 1,3-Diene Formation in the Gold-Catalyzed Reaction of Alkynes with Alkenes: The Complete Mechanistic Picture. J Am Chem Soc 2017; 139:10302-10311. [PMID: 28700226 PMCID: PMC5543397 DOI: 10.1021/jacs.7b03005] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The intermolecular gold(I)-catalyzed reaction between arylalkynes and alkenes leads to cyclobutenes by a [2 + 2] cycloaddition, which takes place stepwise, first by formation of cyclopropyl gold(I) carbenes, followed by a ring expansion. However, 1,3-butadienes are also formed in the case of ortho-substituted arylalkynes by a metathesis-type process. The corresponding reaction of alkenes with aryl-1,3-butadiynes, ethynylogous to arylalkynes, leads exclusively to cyclobutenes. A comprehensive mechanism for the gold(I)-catalyzed reaction of alkynes with alkenes is proposed on the basis of density functional theory calculations, which shows that the two pathways leading to cyclobutenes or dienes are very close in energy. The key intermediates are cyclopropyl gold(I) carbenes, which have been independently generated by retro-Buchner reaction from stereodefined 1a,7b-dihydro-1H-cyclopropa[a]naphthalenes.
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Affiliation(s)
- M Elena de Orbe
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology , Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Laura Amenós
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology , Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Mariia S Kirillova
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology , Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Yahui Wang
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology , Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Verónica López-Carrillo
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology , Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology , Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Química, Universitat Autònoma de Barcelona , 08193 Bellaterra, Spain
| | - Antonio M Echavarren
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology , Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili , C/Marcel·li Domingo s/n, 43007 Tarragona, Spain
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72
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Zhang FG, Marek I. Brook Rearrangement as Trigger for Carbene Generation: Synthesis of Stereodefined and Fully Substituted Cyclobutenes. J Am Chem Soc 2017; 139:8364-8370. [DOI: 10.1021/jacs.7b04255] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Fa-Guang Zhang
- The Mallat Family Laboratory of Organic
Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic
Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel
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73
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ZHANG XINGHUI. DFT study on the mechanism of InBr3-catalyzed [2+2] cycloaddition of allyltrimethylsilane with alkynones. J CHEM SCI 2017. [DOI: 10.1007/s12039-017-1260-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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74
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dos Passos Gomes G, Alabugin IV. Drawing Catalytic Power from Charge Separation: Stereoelectronic and Zwitterionic Assistance in the Au(I)-Catalyzed Bergman Cyclization. J Am Chem Soc 2017; 139:3406-3416. [DOI: 10.1021/jacs.6b11054] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Gabriel dos Passos Gomes
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-439, United States
| | - Igor V. Alabugin
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-439, United States
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75
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Cheng X, Zhu L, Lin M, Chen J, Huang X. Rapid access to cyclopentadiene derivatives through gold-catalyzed cycloisomerization of ynamides with cyclopropenes by preferential activation of alkenes over alkynes. Chem Commun (Camb) 2017; 53:3745-3748. [DOI: 10.1039/c7cc01368j] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Double bond activation: the current transformation represents a rare example of preferential activation of alkenes over alkynes under gold catalysis.
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Affiliation(s)
- Xing Cheng
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Lei Zhu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Meijun Lin
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Jianxin Chen
- College of Chemistry and Chemical Engineering
- Fujian Normal University
- Fuzhou
- P. R. China
| | - Xueliang Huang
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
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76
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Roemer M, Wild DA, Skelton BW, Sobolev AN, Nealon GL, Piggott MJ, Koutsantonis GA. Control over cyclisation sequences of 1,1′-bifunctional octamethylferrocenes to ferrocenophanes. Dalton Trans 2017; 46:10899-10907. [DOI: 10.1039/c7dt02037f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper describes the facile synthesis of a number of electron rich octamethyl[1.4]ferrocenophanes with unsaturated handles from 1,1′-bis(1-chlorovinyl)octamethylferrocene.
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Affiliation(s)
- Max Roemer
- Chemistry
- School of Molecular Sciences
- University of Western Australia
- Crawley
- Australia
| | - Duncan A. Wild
- Chemistry
- School of Molecular Sciences
- University of Western Australia
- Crawley
- Australia
| | - Brian W. Skelton
- Chemistry
- School of Molecular Sciences
- University of Western Australia
- Crawley
- Australia
| | - Alexandre N. Sobolev
- Centre for Microscopy
- Characterisation and Analysis
- University of Western Australia
- Crawley
- Australia
| | - Gareth L. Nealon
- Centre for Microscopy
- Characterisation and Analysis
- University of Western Australia
- Crawley
- Australia
| | - Matthew J. Piggott
- Chemistry
- School of Molecular Sciences
- University of Western Australia
- Crawley
- Australia
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77
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Hayakawa I, Sakakura A, Yamanaka Y, Ota H, Mitsudo K. Regioselective DMAD-Insertion Reaction of Silyl Dienol Ether of γ-Pyrone under Catalyst- and Heating-Free Conditions. HETEROCYCLES 2017. [DOI: 10.3987/com-17-13820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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78
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Hosseyni S, Smith CA, Shi X. Gold-Catalyzed Vinyl Ether Hydroalkynylation: An Alternative Pathway for the Gold-Catalyzed Intermolecular Reaction of Alkenes and Alkynes. Org Lett 2016; 18:6336-6339. [PMID: 27978688 PMCID: PMC6430632 DOI: 10.1021/acs.orglett.6b03228] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In this report, the gold-catalyzed intermolecular reaction of vinyl ethers and terminal alkynes is investigated. Utilizing a triazole gold catalyst lessens gold decomposition in the presence of the vinyl ether and affords an alkynylation product instead of the [2 + 2] product. This protocol has been expanded to include glycal substrates, which undergo a one-pot alkynylation-Ferrier reaction to produce functionalized sugars in moderate to excellent yields with high diastereoselectivity.
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Affiliation(s)
- Seyedmorteza Hosseyni
- The Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Courtney A. Smith
- The Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Xiaodong Shi
- The Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
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79
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Zhu HT, Tong XJ, Zhou NN, Yang DS, Fan MJ. K2S2O8-promoted [2+2]-cycloaddition of benzyl-2-(3-hydroxypropynyl)-benzoates: A new route to polysubstituted cyclobutanes. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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80
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Misale A, Niyomchon S, Maulide N. Cyclobutenes: At a Crossroad between Diastereoselective Syntheses of Dienes and Unique Palladium-Catalyzed Asymmetric Allylic Substitutions. Acc Chem Res 2016; 49:2444-2458. [PMID: 27797480 DOI: 10.1021/acs.accounts.6b00375] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The rich chemistry of cyclobutanes is underpinned by a large body of synthetic literature devoted to their synthesis and decoration. This is motivated by the widespread representation of cyclobutane moieties in biologically active natural products and man-made molecules. Surprisingly, this vast array of knowledge finds no parallel in the chemistry of cyclobutenes, their unsaturated analogues. In particular, a dearth of methods to synthesize enantioenriched cyclobutenes is apparent upon cursory investigation of the literature. As a leading example, the photocycloaddition of maleic anhydride to acetylene or dichloroethylene, probably a benchmark of cyclobutene synthesis, delivers a meso cyclic anhydride which can be further converted to a cyclobutene product by enantioselective desymmetrization by ring opening. Nonetheless, such an approach delivers products with a rather inflexible substitution pattern around the four-membered ring. The lack of general approaches has motivated our group and others to develop novel routes to cyclobutene scaffolds, leading to the development of a strategy that combines photochemistry and catalysis. Indeed, we have coupled the simple and efficient photochemical isomerization of 2-pyrone into a strained bicyclo[2.2.0] lactone with palladium-catalyzed allylic alkylation as a simple and versatile access to functionalized cyclobutenes. Several nucleophiles can be added to the activated, strained intermediate, including malonate anions and azlactones. The products are mono- and bicyclic building blocks richly decorated with functional groups. Importantly, they are formed with high levels of diastereoselectivity as expected by the tenets of palladium-catalyzed allylic alkylation, which posit that the oxidative addition and nucleophilic capture steps proceed with inversion of configuration, resulting in overall retention (inversion + inversion). However, the transposition of the methodology to an asymmetric version subsequently led to the surprising discovery of a family of highly enantioselective, diastereodivergent catalytic processes. Indeed, we observed a ligand-dependent stereochemical outcome for a range of palladium-catalyzed allylic alkylations affording either overall retention or overall inversion of configuration, and that with very high levels of enantio- and diastereoselectivity. The new family of diastereodivergent reactions enables the conversion of the aforementioned racemic bicyclo[2.2.0] lactone into each of 4 stereoisomeric products, at will. Although the mechanistic details at the origin of this unusual stereodivergence are not yet fully elucidated, it became clear through our studies that unique Pd-allyl complexes, residing preferentially as their σ-(monohapto)-bound isomers, are at the heart of the process. The cyclobutenes prepared can also engage in electrocyclic ring-opening reactions (often spontaneous depending on the substitution pattern) that link this chemistry with that of diene and polyene frameworks. Using the strategies laid out above, our group was then able to harness the high stereospecificity of electrocyclic reactions and design modular syntheses of several natural products and natural product fragments. We believe that the methods presented herein shall soon pave the way for the streamlined synthesis of more complex polyenic natural products.
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Affiliation(s)
- Antonio Misale
- University of Vienna, Institute of Organic Chemistry, Währinger Straße 38, 1090 Vienna, Austria
| | - Supaporn Niyomchon
- University of Vienna, Institute of Organic Chemistry, Währinger Straße 38, 1090 Vienna, Austria
| | - Nuno Maulide
- University of Vienna, Institute of Organic Chemistry, Währinger Straße 38, 1090 Vienna, Austria
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81
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Zhao L, Zhang L, Fang DC. DFT Study on Rhodium-Catalyzed Intermolecular [2 + 2] Cycloaddition of Terminal Alkynes with Electron-Deficient Alkenes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00646] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liu Zhao
- College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Lei Zhang
- College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - De-Cai Fang
- College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
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82
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Antonio M. Echavarren. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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83
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Antonio M. Echavarren. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/anie.201606837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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84
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Li DY, Wei Y, Shi M. Gold(I)-Catalyzed Intramolecular Carbon-Oxygen Bond Cleavage ReactionviaGold Carbenes Derived from Vinylidenecyclopropanes. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600483] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- De-Yao Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 People's Republic of China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 People's Republic of China
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 People's Republic of China
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85
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Jia M, Ma S. New Approaches to the Synthesis of Metal Carbenes. Angew Chem Int Ed Engl 2016; 55:9134-66. [DOI: 10.1002/anie.201508119] [Citation(s) in RCA: 227] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 12/05/2015] [Indexed: 01/07/2023]
Affiliation(s)
- Minqiang Jia
- Department of ChemistryFudan University 220 Handan Road Shanghai 200433 P.R. China
| | - Shengming Ma
- Department of ChemistryFudan University 220 Handan Road Shanghai 200433 P.R. China
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P.R. China
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86
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Jaroschik F, Simonneau A, Lemière G, Cariou K, Agenet N, Amouri H, Aubert C, Goddard JP, Lesage D, Malacria M, Gimbert Y, Gandon V, Fensterbank L. Assessing Ligand and Counterion Effects in the Noble Metal Catalyzed Cycloisomerization Reactions of 1,6-Allenynes: a Combined Experimental and Theoretical Approach. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02696] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Florian Jaroschik
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Antoine Simonneau
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Gilles Lemière
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Kevin Cariou
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Nicolas Agenet
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Hani Amouri
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Corinne Aubert
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Jean-Philippe Goddard
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Denis Lesage
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Max Malacria
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Yves Gimbert
- Université Grenoble Alpes and CNRS, DCM (UMR 5250), F-38000 Grenoble, France
| | - Vincent Gandon
- Institut
de Chimie Moléculaire et des Matériaux d’Orsay,
CNRS UMR 8182, Université Paris-Sud, Université Paris-Saclay, Bâtiment
420, 91405 Orsay cedex, France
| | - Louis Fensterbank
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
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87
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Chen GQ, Fang W, Wei Y, Tang XY, Shi M. Divergent reaction pathways in gold-catalyzed cycloisomerization of 1,5-enynes containing a cyclopropane ring: dramatic ortho substituent and temperature effects. Chem Sci 2016; 7:4318-4328. [PMID: 30155078 PMCID: PMC6013813 DOI: 10.1039/c6sc00058d] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 03/03/2016] [Indexed: 12/23/2022] Open
Abstract
A gold(i)-catalyzed cycloisomerization of easily available 1,5-enynes containing a cyclopropane ring has been developed, efficiently providing cyclobutane-fused 1,4-cyclohexadiene, tricyclic cyclobutene, biscyclopropane and 1,3-cyclohexadiene derivatives in moderate to excellent yields. When the phenyl group was not ortho substituted, 1,4-cyclohexadienes could be produced. With an ortho substituent, three different products could be selectively synthesized by control of the temperature and the used gold(i) catalyst. The 1,5-enyne substrate first undergoes a classical enyne cycloisomerization to form a tricyclic cyclobutene key intermediate, which undergoes subsequent transformation to produce the desired products. A plausible reaction mechanism was proposed according to deuterium labeling experiments and intermediate trapping experiments, as well as DFT calculations. In our current reaction, the ortho substituent on the phenyl group controls the reaction outcome and the ortho substituent effect was found to originate from steric and electronic factors.
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Affiliation(s)
- Gen-Qiang Chen
- State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China . ; ;
| | - Wei Fang
- State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China . ; ;
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China . ; ;
| | - Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China . ; ;
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China . ; ;
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88
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Pretorius R, Fructos MR, Müller-Bunz H, Gossage RA, Pérez PJ, Albrecht M. Synthesis and catalytic applications of 1,2,3-triazolylidene gold(i) complexes in silver-free oxazoline syntheses and C-H bond activation. Dalton Trans 2016; 45:14591-602. [PMID: 27363515 DOI: 10.1039/c6dt02181f] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A series of novel 1,2,3-triazolylidene gold(i) chloride complexes have been synthesised and fully characterised. Silver-free methodologies for chloride ion abstraction of these complexes were evaluated for their potential as Au-based catalyst precursors. Using simple potassium salts or MeOTf as chloride scavengers produced metal complexes that catalyse both the regioselective synthesis of oxazolines and the C-H activation of benzene or styrene for carbene transfer from ethyl diazoacetate. These results indicate that Ag-free activation of 1,2,3-triazolylidene gold(i) chloride complexes is feasible for the generation of catalytically active Au triazolylidene species. However, silver-mediated activation imparts substantially higher catalytic activity in oxazoline synthesis.
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Affiliation(s)
- René Pretorius
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland.
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89
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Affiliation(s)
- Minqiang Jia
- Department of ChemistryFudan University 220 Handan Road Shanghai 200433 P.R. China
| | - Shengming Ma
- Department of ChemistryFudan University 220 Handan Road Shanghai 200433 P.R. China
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 P.R. China
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90
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Ranieri B, Obradors C, Mato M, Echavarren AM. Synthesis of Rumphellaone A and Hushinone by a Gold-Catalyzed [2 + 2] Cycloaddition. Org Lett 2016; 18:1614-7. [PMID: 26974011 PMCID: PMC4820790 DOI: 10.1021/acs.orglett.6b00473] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The enantioselective total synthesis of rumphellaone A has been accomplished in 12 steps via a diastereoselective gold(I)-catalyzed [2 + 2] macrocyclization of a 1,10-enyne as the key step to build the cyclobutene moiety. This concise approach has also led to the total synthesis of husinone.
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Affiliation(s)
- Beatrice Ranieri
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology , Av Països Catalans 16, 43007 Tarragona, Spain
| | - Carla Obradors
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology , Av Països Catalans 16, 43007 Tarragona, Spain
| | - Mauro Mato
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology , Av Països Catalans 16, 43007 Tarragona, Spain
| | - Antonio M Echavarren
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology , Av Països Catalans 16, 43007 Tarragona, Spain.,Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili , C/Marcel·li Domingo s/n, 43007 Tarragona, Spain
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91
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Fructos MR, Prieto A. [2+2] Cycloaddition reactions promoted by group 11 metal-based catalysts. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.031] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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92
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Chen YL, Sharma P, Liu RS. Sulfonamide-directed gold-catalyzed [2+2+2]-cycloadditions of nitriles with two discrete ynamides to construct 2,4-diaminopyridine cores. Chem Commun (Camb) 2016; 52:3187-90. [DOI: 10.1039/c5cc09688j] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Gold-catalyzed [2+2+2]-cycloadditions of two discrete ynamides and one nitrile afford 2,4-diaminopyridine derivatives; our mechanistic analysis reveals that the reaction chemoselectivity is affected by the types of sulfonamides.
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Affiliation(s)
- Yu-Ling Chen
- Department of Chemistry
- National Tsing-Hua University
- Hsinchu
- Republic of China
| | - Pankaj Sharma
- Department of Chemistry
- National Tsing-Hua University
- Hsinchu
- Republic of China
| | - Rai-Shung Liu
- Department of Chemistry
- National Tsing-Hua University
- Hsinchu
- Republic of China
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93
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Wu Z, Retailleau P, Gandon V, Voituriez A, Marinetti A. Use of Planar Chiral Ferrocenylphosphine-Gold(I) Complexes in the Asymmetric Cycloisomerization of 3-Hydroxylated 1,5-Enynes. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501121] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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94
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Okamoto K, Shimbayashi T, Tamura E, Ohe K. Indium-Catalyzed [2 + 2] Cycloaddition of Allylsilanes to Internal Alkynones. Org Lett 2015; 17:5843-5. [DOI: 10.1021/acs.orglett.5b03065] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kazuhiro Okamoto
- Department
of Energy and
Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura,
Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takuya Shimbayashi
- Department
of Energy and
Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura,
Nishikyo-ku, Kyoto 615-8510, Japan
| | - Eisuke Tamura
- Department
of Energy and
Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura,
Nishikyo-ku, Kyoto 615-8510, Japan
| | - Kouichi Ohe
- Department
of Energy and
Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura,
Nishikyo-ku, Kyoto 615-8510, Japan
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95
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Wu Y, Zhu L, Yu Y, Luo X, Huang X. Polysubstituted 2-Aminopyrrole Synthesis via Gold-Catalyzed Intermolecular Nitrene Transfer from Vinyl Azide to Ynamide: Reaction Scope and Mechanistic Insights. J Org Chem 2015; 80:11407-16. [DOI: 10.1021/acs.joc.5b02057] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yufeng Wu
- College
of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, P. R. China
| | - Lei Zhu
- Key
Laboratory of Coal to Ethylene Glycol and Its Related Technology,
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Yinghua Yu
- Key
Laboratory of Coal to Ethylene Glycol and Its Related Technology,
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Xuesong Luo
- School
of Chemistry and Chemical Engineering, Shihezi University, Xinjiang Uygur Autonomous
Region, 832000, P. R. China
| | - Xueliang Huang
- Key
Laboratory of Coal to Ethylene Glycol and Its Related Technology,
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
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96
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Uruvakili A, Gangadhararao G, Kumara Swamy KC. Gold(I) catalysed sequential dehydrative cyclisation/intermolecular [4 + 2] cycloaddition of alkynyldienols onto activated alkynes/alkenes: a facile route to substituted norbornadienes/norbornenes. Org Biomol Chem 2015; 13:10060-71. [PMID: 26335651 DOI: 10.1039/c5ob01458a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One-pot synthesis of highly substituted norbornadienes/norbornenes via gold-catalysed dehydrative cyclisation of alkynyldienols, followed by intermolecular [4 + 2] cycloaddition of in situ generated cyclopentadiene and activated alkynes/alkenes is described. The precursors, alkynyldienols, are obtained via sequential Sonogashira cross-coupling of 3-bromoenals, alkyne addition and reduction. Yields of the enynals and multisubstituted norbornadienes in all the cases are good to excellent.
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Affiliation(s)
- Anasuyamma Uruvakili
- School of Chemistry, University of Hyderabad, Hyderabad-500046, Telangana, India.
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97
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Li DY, Wei Y, Marek I, Tang XY, Shi M. Gold(i)-catalyzed cycloisomerization of vinylidenecyclopropane-enes via carbene or non-carbene processes. Chem Sci 2015; 6:5519-5525. [PMID: 29861890 PMCID: PMC5949847 DOI: 10.1039/c5sc01806d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 06/23/2015] [Indexed: 12/27/2022] Open
Abstract
Gold catalyzed cycloisomerization of aromatic ring tethered vinylidenecyclopropane-enes provides a divergent synthetic protocol for the construction of O-containing fused heterocycles through controllable carbene or non-carbene related processes. The carbene induced process features a new amphiphilic strategy to generate a gold carbene via a rearrangement of vinylidenecyclopropane. Whereas, the electronic effect of the ortho-substituents switches the reaction mode onto the non-carbene related process, from which five- or six-membered rings are selectively produced through allyl-migration.
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Affiliation(s)
- De-Yao Li
- State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China . ;
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China . ;
| | - Ilan Marek
- Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Technion City , Haifa 32000 , Israel .
| | - Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China . ;
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China . ;
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98
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Grande-Carmona F, Iglesias-Sigüenza J, Álvarez E, Díez E, Fernández R, Lassaletta JM. Synthesis and Characterization of Axially Chiral Imidazoisoquinolin-2-ylidene Silver and Gold Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00681] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Francisca Grande-Carmona
- Departamento
de Química Orgánica and Centro de Innovación
en Química Avanzada (ORFEO-CINQA), University of Seville, C/Prof. García González, 1, 41012 Sevilla, Spain
| | - Javier Iglesias-Sigüenza
- Departamento
de Química Orgánica and Centro de Innovación
en Química Avanzada (ORFEO-CINQA), University of Seville, C/Prof. García González, 1, 41012 Sevilla, Spain
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas (CSIC-USe) and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Avenida Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Elena Díez
- Departamento
de Química Orgánica and Centro de Innovación
en Química Avanzada (ORFEO-CINQA), University of Seville, C/Prof. García González, 1, 41012 Sevilla, Spain
| | - Rosario Fernández
- Departamento
de Química Orgánica and Centro de Innovación
en Química Avanzada (ORFEO-CINQA), University of Seville, C/Prof. García González, 1, 41012 Sevilla, Spain
| | - José M. Lassaletta
- Instituto de Investigaciones Químicas (CSIC-USe) and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Avenida Américo Vespucio, 49, 41092 Sevilla, Spain
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99
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Dorel R, Echavarren AM. Gold(I)-Catalyzed Activation of Alkynes for the Construction of Molecular Complexity. Chem Rev 2015; 115:9028-72. [PMID: 25844920 PMCID: PMC4580024 DOI: 10.1021/cr500691k] [Citation(s) in RCA: 1311] [Impact Index Per Article: 145.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Indexed: 12/17/2022]
Affiliation(s)
- Ruth Dorel
- Institute of Chemical
Research of Catalonia (ICIQ), Av. Països
Catalans 16, 43007 Tarragona, Spain
| | - Antonio M. Echavarren
- Institute of Chemical
Research of Catalonia (ICIQ), Av. Països
Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
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100
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Dorel R, Echavarren AM. Gold-Catalyzed Reactions via Cyclopropyl Gold Carbene-like Intermediates. J Org Chem 2015; 80:7321-32. [PMID: 26061916 PMCID: PMC4531321 DOI: 10.1021/acs.joc.5b01106] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Indexed: 12/31/2022]
Abstract
Cycloisomerizations of 1,n-enynes catalyzed by gold(I) proceed via electrophilic species with a highly distorted cyclopropyl gold(I) carbene-like structure, which can react with different nucleophiles to form a wide variety of products by attack at the cyclopropane or the carbene carbons. Particularly important are reactions in which the gold(I) carbene reacts with alkenes to form cyclopropanes either intra- or intermolecularly. In the absence of nucleophiles, 1,n-enynes lead to a variety of cycloisomerized products including those resulting from skeletal rearrangements. Reactions proceeding through cyclopropyl gold(I) carbene-like intermediates are ideally suited for the bioinspired synthesis of terpenoid natural products by the selective activation of the alkyne in highly functionalized enynes or polyenynes.
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Affiliation(s)
- Ruth Dorel
- Institute of Chemical Research
of Catalonia (ICIQ), Av Països Catalans 16, 43007 Tarragona, Spain
| | - Antonio M. Echavarren
- Institute of Chemical Research
of Catalonia (ICIQ), Av Països Catalans 16, 43007 Tarragona, Spain
- Departament de Química Analítica i Química Orgánica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
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