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Tendera L, Helm M, Krahfuss MJ, Kuntze-Fechner MW, Radius U. Case Study of N- i Pr versus N-Mes Substituted NHC Ligands in Nickel Chemistry: The Coordination and Cyclotrimerization of Alkynes at [Ni(NHC) 2 ]. Chemistry 2021; 27:17849-17861. [PMID: 34713939 PMCID: PMC9299202 DOI: 10.1002/chem.202103093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Indexed: 01/21/2023]
Abstract
A case study on the effect of the employment of two different NHC ligands in complexes [Ni(NHC)2] (NHC=iPr2ImMe1Me, Mes2Im 2) and their behavior towards alkynes is reported. The reaction of a mixture of [Ni2(iPr2ImMe)4(μ‐(η2 : η2)‐COD)] B/ [Ni(iPr2ImMe)2(η4‐COD)] B’ or [Ni(Mes2Im)2] 2, respectively, with alkynes afforded complexes [Ni(NHC)2(η2‐alkyne)] (NHC=iPr2ImMe: alkyne=MeC≡CMe 3, H7C3C≡CC3H74, PhC≡CPh 5, MeOOCC≡CCOOMe 6, Me3SiC≡CSiMe37, PhC≡CMe 8, HC≡CC3H79, HC≡CPh 10, HC≡C(p‐Tol) 11, HC≡C(4‐tBu‐C6H4) 12, HC≡CCOOMe 13; NHC=Mes2Im: alkyne=MeC≡CMe 14, MeOOCC≡CCOOMe 15, PhC≡CMe 16, HC≡C(4‐tBu‐C6H4) 17, HC≡CCOOMe 18). Unusual rearrangement products 11 a and 12 a were identified for the complexes of the terminal alkynes HC≡C(p‐Tol) and HC≡C(4‐tBu‐C6H4), 11 and 12, which were formed by addition of a C−H bond of one of the NHC N‐iPr methyl groups to the C≡C triple bond of the coordinated alkyne. Complex 2 catalyzes the cyclotrimerization of 2‐butyne, 4‐octyne, diphenylacetylene, dimethyl acetylendicarboxylate, 1‐pentyne, phenylacetylene and methyl propiolate at ambient conditions, whereas 1Me is not a good catalyst. The reaction of 2 with 2‐butyne was monitored in some detail, which led to a mechanistic proposal for the cyclotrimerization at [Ni(NHC)2]. DFT calculations reveal that the differences between 1Me and 2 for alkyne cyclotrimerization lie in the energy profile of the initiation steps, which is very shallow for 2, and each step is associated with only a moderate energy change. The higher stability of 3 compared to 14 is attributed to a better electron transfer from the NHC to the metal to the alkyne ligand for the N‐alkyl substituted NHC, to enhanced Ni‐alkyne backbonding due to a smaller CNHC−Ni−CNHC bite angle, and to less steric repulsion of the smaller NHC iPr2ImMe.
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Affiliation(s)
- Lukas Tendera
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Moritz Helm
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Mirjam J Krahfuss
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Maximilian W Kuntze-Fechner
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Udo Radius
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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2
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Tyler JL, Noble A, Aggarwal VK. Strain-Release Driven Spirocyclization of Azabicyclo[1.1.0]butyl Ketones. Angew Chem Int Ed Engl 2021; 60:11824-11829. [PMID: 33754432 PMCID: PMC8251566 DOI: 10.1002/anie.202102754] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Indexed: 12/16/2022]
Abstract
Due to their intrinsic rigidity, three-dimensionality and structural novelty, spirocyclic molecules have become increasingly sought-after moieties in drug discovery. Herein, we report a strain-release driven synthesis of azetidine-containing spirocycles by harnessing the inherent ring strain of the azabicyclo[1.1.0]butane (ABB) fragment. Novel ABB-ketone precursors bearing silyl-protected alcohols were synthesized in a single step and shown to engage in electrophile-induced spirocyclization-desilylation reactions. Primary, secondary and tertiary silyl ethers were effectively transformed into a library of new spiro-azetidines, with a range of substituents and ring sizes. In addition, the products are generated with synthetically useful ketone and protected-amine functional groups, which provides the potential for further elaboration and for this chemistry to be utilized in the rapid assembly of medicinally relevant compounds.
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Affiliation(s)
- Jasper L. Tyler
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - Adam Noble
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
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3
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Tyler JL, Noble A, Aggarwal VK. Strain‐Release Driven Spirocyclization of Azabicyclo[1.1.0]butyl Ketones. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102754] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jasper L. Tyler
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Adam Noble
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
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4
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Boyd O, Wang G, Sokolova OO, Calow ADJ, Bertrand SM, Bower JF. Modular Access to Eight‐Membered N‐Heterocycles by Directed Carbonylative C−C Bond Activation of Aminocyclopropanes. Angew Chem Int Ed Engl 2019; 58:18844-18848. [DOI: 10.1002/anie.201910276] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/26/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Olivia Boyd
- School of ChemistryUniversity of Bristol Bristol BS8 1TS UK
| | - Gang‐Wei Wang
- School of ChemistryUniversity of Bristol Bristol BS8 1TS UK
| | | | | | - Sophie M. Bertrand
- GlaxoSmithKline R&DMedicines Research Centre Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
| | - John F. Bower
- School of ChemistryUniversity of Bristol Bristol BS8 1TS UK
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5
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Boyd O, Wang G, Sokolova OO, Calow ADJ, Bertrand SM, Bower JF. Modular Access to Eight‐Membered N‐Heterocycles by Directed Carbonylative C−C Bond Activation of Aminocyclopropanes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910276] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Olivia Boyd
- School of ChemistryUniversity of Bristol Bristol BS8 1TS UK
| | - Gang‐Wei Wang
- School of ChemistryUniversity of Bristol Bristol BS8 1TS UK
| | | | | | - Sophie M. Bertrand
- GlaxoSmithKline R&DMedicines Research Centre Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
| | - John F. Bower
- School of ChemistryUniversity of Bristol Bristol BS8 1TS UK
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6
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Zhou Y, Wei YL, Rodriguez J, Coquerel Y. Enantioselective Organocatalytic Four-Atom Ring Expansion of Cyclobutanones: Synthesis of Benzazocinones. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810184] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yirong Zhou
- Aix Marseille Université; CNRS; Centrale Marseille, ISM2; 13397 Marseille France
- Key Laboratory of Functional Small Organic Molecules Ministry of Education; Jiangxi Normal University; 330022 Nanchang China
| | - Yun-Long Wei
- Aix Marseille Université; CNRS; Centrale Marseille, ISM2; 13397 Marseille France
| | - Jean Rodriguez
- Aix Marseille Université; CNRS; Centrale Marseille, ISM2; 13397 Marseille France
| | - Yoann Coquerel
- Aix Marseille Université; CNRS; Centrale Marseille, ISM2; 13397 Marseille France
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7
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Zhou Y, Wei YL, Rodriguez J, Coquerel Y. Enantioselective Organocatalytic Four-Atom Ring Expansion of Cyclobutanones: Synthesis of Benzazocinones. Angew Chem Int Ed Engl 2018; 58:456-460. [PMID: 30398303 DOI: 10.1002/anie.201810184] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/15/2018] [Indexed: 01/04/2023]
Abstract
An enantioselective Michael addition- four-atom ring expansion cascade reaction involving cyclobutanones activated by a N-aryl secondary amide group and ortho-amino nitrostyrenes has been developed for the preparation of functionalized eight-membered benzolactams using bifunctional aminocatalysts. Taking advantage of the secondary amide activating group, the eight-membered cyclic products could be further rearranged into their six-membered isomers having a glutarimide core under base catalysis conditions without erosion of optical purity, featuring an overall ring expansion- ring contraction strategy.
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Affiliation(s)
- Yirong Zhou
- Aix Marseille Université, CNRS, Centrale Marseille, ISM2, 13397, Marseille, France.,Key Laboratory of Functional Small Organic Molecules Ministry of Education, Jiangxi Normal University, 330022, Nanchang, China
| | - Yun-Long Wei
- Aix Marseille Université, CNRS, Centrale Marseille, ISM2, 13397, Marseille, France
| | - Jean Rodriguez
- Aix Marseille Université, CNRS, Centrale Marseille, ISM2, 13397, Marseille, France
| | - Yoann Coquerel
- Aix Marseille Université, CNRS, Centrale Marseille, ISM2, 13397, Marseille, France
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8
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Gomes F, Echeverria PG, Fürstner A. Iron- or Palladium-Catalyzed Reaction Cascades Merging Cycloisomerization and Cross-Coupling Chemistry. Chemistry 2018; 24:16814-16822. [PMID: 30183112 DOI: 10.1002/chem.201803360] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Indexed: 12/26/2022]
Abstract
A conceptually novel reaction cascade is presented, which allows readily available enynes to be converted into functionalized 1,3-dienes comprising a stereodefined tetrasubstituted alkene unit; such compounds are difficult to make by conventional means. The overall transformation is thought to commence with formation of a metallacyclic intermediate that evolves via cleavage of an unstrained C-X bond in its backbone. This non-canonical cycloisomerization process is followed by a cross-coupling step, such that reductive C-C bond formation regenerates the necessary low-valent metal fragment and hence closes an intricate catalytic cycle. The cascade entails the formation of two new C-C bonds at the expense of the constitutional C-X entity of the substrate: importantly, the extruded group X must not be a heteroelement (X=O, NR), since activated β-C-C bonds can also be broken. This concern was reduced to practice in two largely complementary formats: one procedure relies on the use of alkyl-Grignard reagents in combination with catalytic amounts of Fe(acac)3, whereas the second method amalgamates cycloisomerization with Suzuki coupling by recourse to arylboronic acids and phosphine-ligated palladium catalysts.
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Affiliation(s)
- Filipe Gomes
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| | | | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
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Trost BM, Kalnmals CA. Sulfones as Synthetic Linchpins: Transition‐Metal‐Free sp
3
–sp
2
and sp
2
–sp
2
Cross‐Couplings Between Geminal Bis(sulfones) and Organolithium Compounds. Chemistry 2018; 24:9066-9074. [PMID: 29543985 DOI: 10.1002/chem.201800118] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry Stanford University Stanford CA 94305 USA
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10
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Zhou X, Dong G. Nickel-Catalyzed Chemo- and Enantioselective Coupling between Cyclobutanones and Allenes: Rapid Synthesis of [3.2.2] Bicycles. Angew Chem Int Ed Engl 2016; 55:15091-15095. [PMID: 27813276 PMCID: PMC5161747 DOI: 10.1002/anie.201609489] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Indexed: 12/12/2022]
Abstract
Herein an intramolecular nickel-catalyzed (4+2) coupling between cyclobutanones and allenes, by C-C cleavage, is reported. The reaction provides a distinct approach for accessing [3.2.2] bicyclic scaffolds which are challenging to prepare through conventional approaches. The reaction is efficient, chemoselective, and pH/redox neutral. Room temperature conditions and low catalyst loadings can be adopted. Excellent enantioselectivity is also achieved.
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Affiliation(s)
- Xuan Zhou
- Department of Chemistry, University of Texas at Austin, Austin,Texas,78712, United states
- Department of Chemistry, University of Chicago, Chicago, Illinois, 60637, United States
| | - Guangbin Dong
- Department of Chemistry, University of Texas at Austin, Austin,Texas,78712, United states
- Department of Chemistry, University of Chicago, Chicago, Illinois, 60637, United States
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11
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Zhou X, Dong G. Nickel-Catalyzed Chemo- and Enantioselective Coupling between Cyclobutanones and Allenes: Rapid Synthesis of [3.2.2] Bicycles. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609489] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xuan Zhou
- Department of Chemistry; University of Texas at Austin; Austin TX 78712 USA
- Department of Chemistry; University of Chicago; Chicago IL 60637 USA
| | - Guangbin Dong
- Department of Chemistry; University of Texas at Austin; Austin TX 78712 USA
- Department of Chemistry; University of Chicago; Chicago IL 60637 USA
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12
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Li T, Xu F, Li X, Wang C, Wan B. Ruthenium-Catalyzed C−C Bond Cleavage of 2H
-Azirines: A Formal [3+2+2] Cycloaddition to Fused Azepine Skeletons. Angew Chem Int Ed Engl 2016; 55:2861-5. [DOI: 10.1002/anie.201510820] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Indexed: 12/20/2022]
Affiliation(s)
- Tengfei Li
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 China
| | - Fen Xu
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 China
- Department of Material and Chemical Engineering; Zhengzhou University of Light Industry; 5 Dongfeng Road Zhengzhou 450002 China
| | - Xincheng Li
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 China
| | - Chunxiang Wang
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 China
| | - Boshun Wan
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 China
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13
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Li T, Xu F, Li X, Wang C, Wan B. Ruthenium-Catalyzed C−C Bond Cleavage of 2H
-Azirines: A Formal [3+2+2] Cycloaddition to Fused Azepine Skeletons. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510820] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tengfei Li
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 China
| | - Fen Xu
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 China
- Department of Material and Chemical Engineering; Zhengzhou University of Light Industry; 5 Dongfeng Road Zhengzhou 450002 China
| | - Xincheng Li
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 China
| | - Chunxiang Wang
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 China
| | - Boshun Wan
- Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457 Zhongshan Road Dalian 116023 China
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14
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Nakamura I, Sato Y, Takeda K, Terada M. Efficient Synthesis of Eight-Membered Nitrogen Heterocycles fromO-Propargylic Oximes by Rhodium-Catalyzed Cascade Reactions. Chemistry 2014; 20:10214-9. [DOI: 10.1002/chem.201403637] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Indexed: 11/05/2022]
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15
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Zhang J, Wu D, Chen X, Liu Y, Xu Z. Copper-Catalyzed Oxidative Cyclization of 1,5-Enynes with Concomitant C–C Bond Cleavage: An Unexpected Access to 3-Formyl-1-indenone Derivatives. J Org Chem 2014; 79:4799-808. [DOI: 10.1021/jo500948b] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Jian Zhang
- State Key Laboratory Breeding
Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green
Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Degui Wu
- State Key Laboratory Breeding
Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green
Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Xiaoling Chen
- State Key Laboratory Breeding
Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green
Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Yunkui Liu
- State Key Laboratory Breeding
Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green
Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Zhenyuan Xu
- State Key Laboratory Breeding
Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green
Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
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Thakur A, Facer ME, Louie J. Nickel-catalyzed cycloaddition of 1,3-dienes with 3-azetidinones and 3-oxetanones. Angew Chem Int Ed Engl 2013; 52:12161-5. [PMID: 24573793 PMCID: PMC4113093 DOI: 10.1002/anie.201306869] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Indexed: 01/16/2023]
Affiliation(s)
- Ashish Thakur
- Department of Chemistry, University of Utah 315 South, 1400 East, Salt Lake City, Utah 84112-0850 (USA)
| | - Megan E. Facer
- Department of Chemistry, University of Utah 315 South, 1400 East, Salt Lake City, Utah 84112-0850 (USA)
| | - Janis Louie
- Department of Chemistry, University of Utah 315 South, 1400 East, Salt Lake City, Utah 84112-0850 (USA)
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17
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Thakur A, Facer ME, Louie J. Nickel-Catalyzed Cycloaddition of 1,3-Dienes with 3-Azetidinones and 3-Oxetanones. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306869] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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18
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Matsuda T, Sakurai Y. Palladium-Catalyzed Ring-Opening Alkynylation of Cyclopropenones. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300220] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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