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Xiao X, Yu ZX. Co-Catalyzed Asymmetric Intramolecular [3+2] Cycloaddition of Yne-Alkylidenecyclopropanes and its Reaction Mechanism. Chemistry 2021; 27:7176-7182. [PMID: 33554413 DOI: 10.1002/chem.202100426] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Indexed: 11/08/2022]
Abstract
Developing new transition metal-catalyzed asymmetric cycloadditions for the synthesis of five-membered carbocycles (FMCs) is a research frontier in reaction development due to the ubiquitous presence of chiral FMCs in various functional molecules. Reported here is our discovery of a highly enantioselective intramolecular [3+2] cycloaddition of yne-alkylidenecyclopropanes (yne-ACPs) to bicyclo[3.3.0]octadiene and bicyclo[4.3.0]nonadiene molecules using a cheap Co catalyst and commercially available chiral ligand (S)-Xyl-BINAP. This reaction avoids the use of precious Pd and Rh catalysts, which are usually the choices for [3+2] reactions with ACPs. The enantiomeric excess in the present reaction can be up to 92 %. Cationic cobalt(I) species was suggested by experiments as the catalytic species. DFT calculations showed that this [3+2] reaction starts with oxidative cyclometallation of alkyne and ACP, followed by ring opening of the cyclopropyl (CP) group and reductive elimination to form the cycloadduct. This mechanism is different from previous [3+2] reactions of ACPs, which usually start from CP cleavage, not from oxidative cyclization.
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Affiliation(s)
- Xiong Xiao
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular, Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871, P. R. China
| | - Zhi-Xiang Yu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular, Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871, P. R. China
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Kerisit N, Toupet L, Larini P, Perrin L, Guillemin JC, Trolez Y. Straightforward synthesis of 5-bromopenta-2,4-diynenitrile and its reactivity towards terminal alkynes: a direct access to diene and benzofulvene scaffolds. Chemistry 2015; 21:6042-7. [PMID: 25761250 DOI: 10.1002/chem.201500633] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Indexed: 11/06/2022]
Abstract
The high-yielding synthesis of 5-bromopenta-2,4-diynenitrile (BrC5 N) was achieved for the first time. Its reactivity with triisopropylsilylacetylene and triisopropylsilylbutadiyne in the presence of copper and palladium as co-catalysts and diisopropylamine was evaluated. It revealed an unprecedented cascade reaction leading to a diene in one case and to a benzofulvene in the other case, with a unique structure. Both of them were characterized by X-ray crystallography, among other techniques. The mechanism of the reaction leading to the diene was investigated experimentally. Theoretical calculations at the DFT level suggest that the mechanism leading to the benzofulvene relies on a hexa-dehydro Diels-Alder (HDDA)-type of mechanism. This work constitutes an example of an unanticipated reactivity leading to an important increase of chemical complexity.
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Affiliation(s)
- Nicolas Kerisit
- Ecole Nationale Supérieure de Chimie de Rennes, UMR 6226, CNRS, 11 allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7 (France), Fax: (+33) 2-23-23-81-08
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Brandi A, Cicchi S, Cordero FM, Goti A. Progress in the synthesis and transformations of alkylidenecyclopropanes and alkylidenecyclobutanes. Chem Rev 2014; 114:7317-420. [PMID: 24927495 DOI: 10.1021/cr400686j] [Citation(s) in RCA: 209] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Alberto Brandi
- Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze , Via della Lastruccia 13, I-50019-Sesto Fiorentino, Italy
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Transition Metal-Catalyzed Cycloadditions of Cyclopropanes for the Synthesis of Carbocycles: C–C Activation in Cyclopropanes. Top Curr Chem (Cham) 2014; 346:195-231. [DOI: 10.1007/128_2014_527] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Zhang DH, Wei Y, Shi M. Gold(I)-Catalyzed Cycloisomerization of Nitrogen- and Oxygen-Tethered Alkylidenecyclopropanes to Tricyclic Compounds. Chemistry 2012; 18:7026-9. [DOI: 10.1002/chem.201200978] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Indexed: 12/24/2022]
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Gao H, Zhang J. Cationic Rhodium(I)-Catalyzed Regioselective Tandem Heterocyclization/[3+2] Cycloaddition of 2-(1-Alkynyl)-2-alken-1-ones with Alkynes. Chemistry 2012; 18:2777-82. [DOI: 10.1002/chem.201103924] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Indexed: 11/08/2022]
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Rhodium(I)-catalyzed [3+2] intramolecular cycloaddition of alkylidenecyclopropane–propargylic esters. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.11.084] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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García-Fandiño R, Gulías M, Mascareñas JL, Cárdenas DJ. Mechanistic study on the palladium-catalyzed (3 + 2) intramolecular cycloaddition of alk-5-enylidenecyclopropanes. Dalton Trans 2012; 41:9468-81. [DOI: 10.1039/c2dt11955b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhang DH, Zhang Z, Shi M. Transition metal-catalyzed carbocyclization of nitrogen and oxygen-tethered 1,n-enynes and diynes: synthesis of five or six-membered heterocyclic compounds. Chem Commun (Camb) 2012; 48:10271-9. [DOI: 10.1039/c2cc34739c] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tamaki T, Ohashi M, Ogoshi S. [3+2] Cycloaddition Reaction of Cyclopropyl Ketones with Alkynes Catalyzed by Nickel/Dimethylaluminum Chloride. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201106174] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Tamaki T, Ohashi M, Ogoshi S. [3+2] Cycloaddition Reaction of Cyclopropyl Ketones with Alkynes Catalyzed by Nickel/Dimethylaluminum Chloride. Angew Chem Int Ed Engl 2011; 50:12067-70. [DOI: 10.1002/anie.201106174] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Indexed: 11/12/2022]
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Feng JJ, Zhang J. An Atom-Economic Synthesis of Bicyclo[3.1.0]hexanes by Rhodium N-Heterocyclic Carbene-Catalyzed Diastereoselective Tandem Hetero-[5 + 2] Cycloaddition/Claisen Rearrangement Reaction of Vinylic Oxiranes with Alkynes. J Am Chem Soc 2011; 133:7304-7. [PMID: 21524076 DOI: 10.1021/ja2014604] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jian-Jun Feng
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China
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Yao B, Li Y, Liang Z, Zhang Y. Ni-Catalyzed Intramolecular Cycloaddition of Methylenecyclopropanes to Alkynes. Org Lett 2011; 13:640-3. [DOI: 10.1021/ol1028628] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bangben Yao
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yong Li
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Zunjun Liang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yuhong Zhang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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Masarwa A, Marek I. Selectivity in metal-catalyzed carbon-carbon bond cleavage of alkylidenecyclopropanes. Chemistry 2010; 16:9712-21. [PMID: 20607773 DOI: 10.1002/chem.201001246] [Citation(s) in RCA: 186] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
When more complex system leads to simpler reactivity profile; the ring-opening of strained three-membered rings such as methylene- and alkylidenecyclopropanes generally lead to several products. If one starts with more functionalized carbon skeletons, selective reactions are now observed and rationalization as well as synthetic applications are described in this concept article. This methodology could be used to the preparation of challenging structural motifs possessing quaternary carbon stereocenters in acyclic systems.
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Affiliation(s)
- Ahmad Masarwa
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
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Back TG, Clary KN, Gao D. Cycloadditions and Cyclizations of Acetylenic, Allenic, and Conjugated Dienyl Sulfones. Chem Rev 2010; 110:4498-553. [DOI: 10.1021/cr1000546] [Citation(s) in RCA: 191] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas G. Back
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Kristen N. Clary
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Detian Gao
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
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Vovard-Le Bray C, Dérien S, Dixneuf PH. Cp*RuCl(COD) in catalysis: A unique role in the addition of diazoalkane carbene to alkynes. CR CHIM 2010. [DOI: 10.1016/j.crci.2009.11.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Yue Y, Yu XQ, Pu L. Base-Catalyzed Highly Stereoselective Conversion of γ-Hydroxy-α,β-acetylenic Esters to γ-Acetoxy Dienoates. Chemistry 2009; 15:5104-7. [DOI: 10.1002/chem.200802355] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Signore G, Malanga C, Menicagli R. Pyridine and triphenylphosphine oxide activation of sulfonyl chlorides in the syntheses of (E) alk-1-enyl sulfones. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.09.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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García-Fandiño R, Gulías M, Castedo L, Granja J, Mascareñas J, Cárdenas D. Palladium-Catalysed [3+2] Cycloaddition of Alk-5-ynylidenecyclopropanes to Alkynes: A Mechanistic DFT Study. Chemistry 2007; 14:272-81. [DOI: 10.1002/chem.200700973] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Rubin M, Rubina M, Gevorgyan V. Transition metal chemistry of cyclopropenes and cyclopropanes. Chem Rev 2007; 107:3117-79. [PMID: 17622181 DOI: 10.1021/cr050988l] [Citation(s) in RCA: 1052] [Impact Index Per Article: 61.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael Rubin
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, USA.
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Bräse S, Schömenauer S, McGaffin G, Stolle A, de Meijere A. Versatile Synthesis of Enantiomerically Pure 2-Alkoxy-1-Ethynylcyclopropanes and their Application in the Synthesis of Enantiomerically Pure Bicyclo-[3.3.0]oct-1-en-3-ones. Chemistry 2006; 2:545-555. [DOI: 10.1002/chem.19960020514] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/1995] [Indexed: 11/10/2022]
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Gao G, Wang Q, Yu XQ, Xie RG, Pu L. Highly Enantioselective Synthesis of γ-Hydroxy-α,β-acetylenic Esters by Asymmetric Alkyne Addition to Aldehydes. Angew Chem Int Ed Engl 2006; 45:122-5. [PMID: 16299819 DOI: 10.1002/anie.200500469] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ge Gao
- Department of Chemistry, Key Laboratory of Green Chemistry and Technology (Ministry of Education), Sichuan University, Chengdu 610064, P.R. China
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Gao G, Wang Q, Yu XQ, Xie RG, Pu L. Highly Enantioselective Synthesis of γ-Hydroxy-α,β-acetylenic Esters by Asymmetric Alkyne Addition to Aldehydes. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200500469] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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25
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Delgado A, Rodríguez JR, Castedo L, Mascareñas JL. Palladium-catalyzed [3+2] intramolecular cycloaddition of alk-5-ynylidenecyclopropanes: a rapid, practical approach to bicyclo[3.3.0]octenes. J Am Chem Soc 2003; 125:9282-3. [PMID: 12889943 DOI: 10.1021/ja0356333] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Readily accessible hex-5-ynylidenecyclopropane derivatives cycloisomerize to bicyclic five-membered carbocycles upon heating with catalytic amounts of a palladium complex.
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Affiliation(s)
- Alejandro Delgado
- Departamento de Química Orgánica y Unidad Asociada al CSIC, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain
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Lewis acid-mediated addition of silylated methylenecyclopropane to aldehydes—synthesis of tetrahydrofuran derivatives. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(02)02737-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Yamamoto Y, Ho Oh B, Nakamura I, Saito S. Synthesis of 3-Methylenepyrrolidines by Palladium-catalyzed [3+2] Cycloaddition of Alkylidenecyclopropanes with Imines. HETEROCYCLES 2003. [DOI: 10.3987/com-03-s30] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Huang X, Zhou H. Novel tunable CuX(2)-mediated cyclization reaction of cyclopropylideneacetic acids and esters for the facile synthesis of 4-halomethyl-2(5H)-furanones and 4-halo-5,6-dihydro-2H-pyran-2-ones. Org Lett 2002; 4:4419-22. [PMID: 12465902 DOI: 10.1021/ol026911q] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A mixture of cyclopropylideneacetic acids (or esters) and CuBr(2) (or CuI/I(2)) in aqueous acetonitrile afforded 4-substituted 2(5H)-furanones or 3,4-substituted 5,6-dihydro-2H-pyran-2-ones in moderate to good yields. The selectivity of the reaction greatly depended on the reaction temperature.
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Affiliation(s)
- Xian Huang
- Department of Chemistry, Zhejiang University (Campus Xixi), Hangzhou 310028, PR China.
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Nakamura I, Oh BH, Saito S, Yamamoto Y. Novel [3+2] Cycloaddition of Alkylidenecyclopropanes with Aldehydes Catalyzed by Palladium. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010401)113:7<1338::aid-ange1338>3.0.co;2-n] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Affiliation(s)
- Itaru Nakamura
- Department of Chemistry, Graduate School of Science Tohoku University Sendai 980-8578 (Japan)
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Suzuki T, Fujimoto H. Theoretical study of the mechanisms of palladation of methylenecyclopropane and [3 + 2] cycloadditions. Inorg Chem 2000; 39:1113-9. [PMID: 12526399 DOI: 10.1021/ic991093s] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Palladation of methylenecyclopropane and [3 + 2] cycloaddition with alkenes have been studied theoretically. In palladium complexes of methylenecyclopropane or trimethylenemethane, the eta 2 forms have been shown to be more stable than the palladacyclobutane forms. However, the barrier heights to yield palladacyclobutanes are not very high and the methylene-bridged carbon can be converted to the metal-attached carbon on palladium via a ring-opened transition state, allowing the scrambling of hydrogens in methylenecyclopropane. With respect to the palladium-catalyzed [3 + 2] cycloaddition reaction of methylenecyclopropane with alkenes, the path via palladacyclobutanes has been demonstrated to be more favorable than the path via an eta 2 complex. These results are discussed by using the paired interaction orbital scheme.
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Affiliation(s)
- T Suzuki
- Division of Molecular Engineering, Kyoto University, Kyoto 606-8501, Japan
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Peron GL, Kitteringham J, Kilburn JD. Lewis acid mediated cyclisation of methylenecyclopropyl ketones and aldehydes. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)00320-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Meguro M, Yamamoto Y. Novel Palladium Catalyzed Formal [3 + 2] Cycloaddition via Hydrocarbonation Reactions of Allenes. J Org Chem 1999; 64:694-695. [PMID: 11674132 DOI: 10.1021/jo982208x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Masaki Meguro
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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Monti H, Rizzotto D, Léandri G. Nouvelle cyclopentannélation regiosélective par une séquence tandem ouverture electrophile/cycloaddition [3+2] entre cétones méthylènecyclopropaniques et l'allyltriméthylsilane. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(98)00335-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Brandi A, Goti A. Synthesis of Methylene- and Alkylidenecyclopropane Derivatives. Chem Rev 1998; 98:589-636. [PMID: 11848910 DOI: 10.1021/cr940341t] [Citation(s) in RCA: 262] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alberto Brandi
- Dipartimento di Chimica Organica "Ugo Schiff", Centro di Studio sulla Chimica e la Struttura dei Composti Eterociclici e loro Applicazioni (CSCEA)-C.N.R., Università degli Studi di Firenze, via G. Capponi 9, I-50121 Firenze, Italy
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Lautens M, Ren Y. Palladium-Catalyzed Intramolecular [3 + 2] Cycloadditions of Methylenecyclopropanes With Alkenes: Diastereomeric Methylenecyclopropanes Exhibit Complementary Facial Selectivity. J Am Chem Soc 1996. [DOI: 10.1021/ja962148h] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mark Lautens
- Department of Chemistry, University of Toronto Toronto, Ontario, Canada M5S 3H6
| | - Yi Ren
- Department of Chemistry, University of Toronto Toronto, Ontario, Canada M5S 3H6
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40
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Lautens M, Ren Y. Transition Metal Catalyzed Stereospecific Intramolecular [3 + 2] Cycloadditions of Methylenecyclopropanes with Alkynes. J Am Chem Soc 1996. [DOI: 10.1021/ja9611809] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mark Lautens
- Contribution from the Department of Chemistry, University of Toronto, Toronto, Ontario, Canada M5S 3H6
| | - Yi Ren
- Contribution from the Department of Chemistry, University of Toronto, Toronto, Ontario, Canada M5S 3H6
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41
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Observations on some Pd(0) catalysed intermolecular reaction of electron deficient alkylidene cyclopropanes with olefins: A novel route to highly functionalised skipped diene units. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)01238-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Heumann A, Réglier M. The stereochemistry of palladium catalysed cyclisation reactions part C: Cascade reactions. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00545-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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43
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Corlay H, Motherwell WB, Pennell AM, Shipman M, Slawin AM, Williams DJ, Binger P, Stepp M. Stereochemical aspects of intramolecular palladium catalysed [3+2] cycloadditions of methylenecyclopropanes. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00160-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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44
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Affiliation(s)
- Mark Lautens
- Department of Chemistry, University of Toronto, Toronto, Ontario Canada M5S 1A1
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Bräse S, de Meijere A. Ungewöhnliche intra- und intermolekulare palladiumkatalysierte Kupplungsreaktionen mit tetrasubstituierten Alkenen vom Methylencyclopropan-Typ. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951072224] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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