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Konno T, Kishi M, Ishihara T, Yamada S. Stereoselective synthesis of CF3-substituted trans- and cis-enediynes via carbocupration or hydrostannation reactions of CF3-containing diyne. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Minakawa M, Ishikawa T, Namioka J, Hirooka S, Zhou B, Kawatsura M. Iron-catalyzed [2 + 2 + 2] cycloaddition of trifluoromethyl group substituted unsymmetrical internal alkynes. RSC Adv 2014. [DOI: 10.1039/c4ra06973k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Iron-catalyzed [2 + 2 + 2] intermolecular cycloaddition of trifluoromethyl group substituted unsymmetrical internal alkynes afforded the corresponding trifluoromethyl group substituted benzene derivatives in high yield with excellent selectivity.
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Affiliation(s)
- Maki Minakawa
- Department of Chemistry
- College of Humanities & Science
- Nihon University
- Tokyo 156-8550, Japan
| | - Tomoki Ishikawa
- Department of Chemistry
- College of Humanities & Science
- Nihon University
- Tokyo 156-8550, Japan
| | - Junya Namioka
- Department of Chemistry
- College of Humanities & Science
- Nihon University
- Tokyo 156-8550, Japan
| | - Souichirou Hirooka
- Department of Chemistry
- College of Humanities & Science
- Nihon University
- Tokyo 156-8550, Japan
| | - Biao Zhou
- Department of Chemistry
- College of Humanities & Science
- Nihon University
- Tokyo 156-8550, Japan
| | - Motoi Kawatsura
- Department of Chemistry
- College of Humanities & Science
- Nihon University
- Tokyo 156-8550, Japan
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Murakami K, Yorimitsu H. Recent advances in transition-metal-catalyzed intermolecular carbomagnesiation and carbozincation. Beilstein J Org Chem 2013; 9:278-302. [PMID: 23503106 PMCID: PMC3596116 DOI: 10.3762/bjoc.9.34] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Accepted: 01/09/2013] [Indexed: 01/27/2023] Open
Abstract
Carbomagnesiation and carbozincation reactions are efficient and direct routes to prepare complex and stereodefined organomagnesium and organozinc reagents. However, carbon-carbon unsaturated bonds are generally unreactive toward organomagnesium and organozinc reagents. Thus, transition metals were employed to accomplish the carbometalation involving wide varieties of substrates and reagents. Recent advances of transition-metal-catalyzed carbomagnesiation and carbozincation reactions are reviewed in this article. The contents are separated into five sections: carbomagnesiation and carbozincation of (1) alkynes bearing an electron-withdrawing group; (2) alkynes bearing a directing group; (3) strained cyclopropenes; (4) unactivated alkynes or alkenes; and (5) substrates that have two carbon-carbon unsaturated bonds (allenes, dienes, enynes, or diynes).
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Affiliation(s)
- Kei Murakami
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hideki Yorimitsu
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
- Japan Science and Technology Agency, Department of Research Projects (ACT-C), Tokyo 102-0076, Japan
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Konno T, Kishi M, Ishihara T. Highly stereocontrolled synthesis of trans-enediynes via carbocupration of fluoroalkylated diynes. Beilstein J Org Chem 2013; 8:2207-13. [PMID: 23365631 PMCID: PMC3558832 DOI: 10.3762/bjoc.8.249] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 12/05/2012] [Indexed: 11/28/2022] Open
Abstract
Treatment of readily prepared (Z)-6-benzyloxy-1,1,1,2-tetrafluoro-6-methyl-2-hepten-4-yne with 1.5 equiv of LHMDS in −78 °C for 1 h gave the corresponding trifluoromethylated diyne in an excellent yield. This diyne was found to be a good substrate for the carbocupration with various higher-ordered cyanocuprates to give the corresponding vinylcuprates in a highly regio- and stereoselective manner. The in situ generated vinylcuprates could react very smoothly with an excess amount of iodine, the vinyl iodides being obtained in high yields. Thus-obtained iodides underwent a very smooth Sonogashira cross-coupling reaction to afford various trans-enediynes in high yields.
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Affiliation(s)
- Tsutomu Konno
- Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-0962, Japan
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Miersch A, Hilt G. Stereodivergent Zinc-Mediated Three-Component Synthesis of Tri- and Tetrasubstituted Alkenes. Chemistry 2012; 18:9798-801. [DOI: 10.1002/chem.201201385] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Indexed: 11/06/2022]
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Konno T, Yamada S, Tani A, Nishida M, Miyabe T, Ishihara T. Unexpected high regiocontrol in Heck reaction of fluorine-containing electron-deficient olefins—Highly regio- and stereoselective synthesis of β-fluoroalkyl-α-aryl-α,β-unsaturated ketones. J Fluor Chem 2009. [DOI: 10.1016/j.jfluchem.2009.07.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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New preparation and synthetic reactions of 3,3,3-trifluoropropynyllithium, -borate and -stannane: facile synthesis of trifluoromethylated allenes, arylacetylenes and enynes. Future Med Chem 2009; 1:921-45. [DOI: 10.4155/fmc.09.69] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Background: Since trifluoromethyl-containing compounds have found diverse applications in the fields of pharmaceuticals and agrochemicals, facile and selective synthetic methods for trifluoromethyl-substituted compounds are an essential tool for advanced medicinal chemistry. Now that diverse synthetic transformations of carbon–carbon triple bonds are available, 3,3,3-trifluoropropynyl-substituted compounds serve as versatile building blocks for target molecules containing trifluoromethyl groups. Thus, novel synthetic methods and reagents for incorporation of a 3,3,3-trifluoropropynyl group into an organic compound have been the major concern in exploration and modification of fluorine-based biologically active substances. Results & discussion: We report a preparative method of 3,3,3-trifluoropropynyllithium and its reaction with electrophiles including aldehydes, ketones, trimethoxyborane, chlorosilanes and chlorostannanes in detail. Palladium-catalyzed synthetic reactions of the carbonyl adducts and the trifluoromethyl-containing metalloid reagents are also demonstrated, which provide simple synthetic methods of trifluoromethylated allenes, arylacetylenes and enynes. The synthetic transformations presented here expand the repertoire of trifluoromethylated compounds available for medicinal scientists and contribute to the advance of future medicinal chemistry.
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Zhang XG, Chen MW, Zhong P, Hu ML. Regio- and stereo-specific preparation of (E)-1-aryl-3,3,3-trifluoro-1-iodo-propenes and their palladium-catalyzed reaction with terminal alkynes. J Fluor Chem 2008. [DOI: 10.1016/j.jfluchem.2008.01.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Takeda Y, Shimizu M, Hiyama T. Straightforward Synthesis of CF3-Substituted Triarylethenes by Stereoselective Threefold Cross-Coupling Reactions. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200703759] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Takeda Y, Shimizu M, Hiyama T. Straightforward Synthesis of CF3-Substituted Triarylethenes by Stereoselective Threefold Cross-Coupling Reactions. Angew Chem Int Ed Engl 2007; 46:8659-61. [DOI: 10.1002/anie.200703759] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Hanamoto T, Anno R, Yamada K, Ryu K. Facile synthesis of α-functionalized vinyl sulfides bearing β-trifluoromethyl group: a highly potential CF3-containing building blocks. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.03.105] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Yamada S, Takahashi T, Konno T, Ishihara T. A novel fluorine–metal exchange reaction of pentafluorocrotonate with organocuprate. Generation of β-metallated tetrafluorocrotonate and its cross-coupling reaction. Chem Commun (Camb) 2007:3679-81. [PMID: 17728892 DOI: 10.1039/b705408d] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorine-metal exchange reaction of 2,3,4,4,4-pentafluorocrotonates with organocuprate derived from Grignard reagent and CuCN takes place efficiently to generate the beta-metallated tetrafluorocrotonate intermediate, which reacts with various electrophiles to give beta-substituted 2,4,4,4-tetrafluorocrotonates.
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Affiliation(s)
- Shigeyuki Yamada
- Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-8585, Japan
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Highly stereoselective one-pot synthesis of tetrasubstituted alkenes via carbopalladation reaction of fluorine-containing acetylene derivatives. J Fluor Chem 2006. [DOI: 10.1016/j.jfluchem.2006.04.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Konno T, Nagai G, Ishihara T. A novel synthetic approach to fluorine-containing acetylenic compounds based on Nicholas reaction. J Fluor Chem 2006. [DOI: 10.1016/j.jfluchem.2005.11.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Konno T, Takehana T, Mishima M, Ishihara T. Palladium-Catalyzed Regio- and Stereoselective Formate Reduction of Fluorine-Containing Allylic Mesylates. A New Entry for the Construction of a Tertiary Carbon Attached with a Fluoroalkyl Group. J Org Chem 2006; 71:3545-50. [PMID: 16626139 DOI: 10.1021/jo0602120] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The regioselective palladium-catalyzed formate reduction of gamma-fluoroalkylated allylic esters is described. Reduction of the allylic esters under the influence of palladium with a monodentate phosphine ligand proceeded preferentially at the gamma position, the corresponding reduction products with a fluoroalkyl group at the tertiary carbon being afforded in high yields. When the chiral allylic ester was employed, complete chirality transfer was observed, leading to the optically active materials in high yields.
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Affiliation(s)
- Tsutomu Konno
- Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
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