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Takai K. Trace Amounts of Second Metal Elements Can Play a Key Role in the Generation of Organometallic Compounds. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20150170] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kazuhiko Takai
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University
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2
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Durán-Peña MJ, Botubol-Ares JM, Hanson JR, Hernández-Galán R, Collado IG. Titanium carbenoid-mediated cyclopropanation of allylic alcohols: selectivity and mechanism. Org Biomol Chem 2015; 13:6325-32. [PMID: 25968250 DOI: 10.1039/c5ob00544b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new method for the chemo- and stereoselective conversion of allylic alcohols into the corresponding cyclopropane derivatives has been developed. The cyclopropanation reaction was carried out with an unprecedented titanium carbenoid generated in situ from Nugent's reagent, manganese and methylene diiodide. The reaction involving the participation of an allylic hydroxyl group, proceeded with conservation of the alkene geometry and in a high diastereomeric excess. The scope, limitations and mechanism of this metal-catalysed reaction are discussed.
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Affiliation(s)
- M J Durán-Peña
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Río San Pedro s/n, Torre sur, 4° planta, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain.
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3
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Takeda T, Mori A, Fujii T, Tsubouchi A. Diversity oriented synthesis of conjugate dienes and alkenylcyclopropanes utilizing silyl group-substituted titanium carbene complexes as bimetallic synthetic reagents. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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4
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Lee VY, Aoki S, Yokoyama T, Horiguchi S, Sekiguchi A, Gornitzka H, Guo JD, Nagase S. Toward a Silicon Version of Metathesis: From Schrock-Type Titanium Silylidenes to Silatitanacyclobutenes. J Am Chem Soc 2013; 135:2987-90. [DOI: 10.1021/ja401072j] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vladimir Ya Lee
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
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5
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6
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Cui H, Li Y, Zhang S. A novel ketone olefination via organozinc reagents in the presence of diphenyl phosphite. Org Biomol Chem 2012; 10:2862-9. [PMID: 22388950 DOI: 10.1039/c2ob06821d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Hua Cui
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science of Soochow University, Suzhou 215123, People's Republic of China
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7
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Gerfaud T, Xie C, Neuville L, Zhu J. Protecting-Group-Free Total Synthesis of (E)- and (Z)-Alstoscholarine. Angew Chem Int Ed Engl 2011; 50:3954-7. [DOI: 10.1002/anie.201100257] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Indexed: 11/11/2022]
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8
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Gerfaud T, Xie C, Neuville L, Zhu J. Protecting-Group-Free Total Synthesis of (E)- and (Z)-Alstoscholarine. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100257] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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9
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Sada M, Komagawa S, Uchiyama M, Kobata M, Mizuno T, Utimoto K, Oshima K, Matsubara S. Reaction Pathway of Methylenation of Carbonyl Compounds with Bis(iodozincio)methane. J Am Chem Soc 2010; 132:17452-8. [DOI: 10.1021/ja104439w] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mutsumi Sada
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoudai-katsura, Nishikyo, Kyoto 615-8510, Japan, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Industrial Chemistry, Faculty of Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606-8510, Japan
| | - Shinsuke Komagawa
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoudai-katsura, Nishikyo, Kyoto 615-8510, Japan, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Industrial Chemistry, Faculty of Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606-8510, Japan
| | - Masanobu Uchiyama
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoudai-katsura, Nishikyo, Kyoto 615-8510, Japan, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Industrial Chemistry, Faculty of Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606-8510, Japan
| | - Masami Kobata
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoudai-katsura, Nishikyo, Kyoto 615-8510, Japan, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Industrial Chemistry, Faculty of Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606-8510, Japan
| | - Tsuyoshi Mizuno
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoudai-katsura, Nishikyo, Kyoto 615-8510, Japan, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Industrial Chemistry, Faculty of Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606-8510, Japan
| | - Kiitiro Utimoto
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoudai-katsura, Nishikyo, Kyoto 615-8510, Japan, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Industrial Chemistry, Faculty of Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606-8510, Japan
| | - Koichiro Oshima
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoudai-katsura, Nishikyo, Kyoto 615-8510, Japan, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Industrial Chemistry, Faculty of Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoudai-katsura, Nishikyo, Kyoto 615-8510, Japan, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Industrial Chemistry, Faculty of Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606-8510, Japan
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10
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Peng ZY, Ma FF, Zhu LF, Xie XM, Zhang Z. Lewis Acid Promoted Carbon−Carbon Double-Bond Formation via Organozinc Reagents and Carbonyl Compounds. J Org Chem 2009; 74:6855-8. [DOI: 10.1021/jo901252z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhi-Yong Peng
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fang-Fang Ma
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lv-Feng Zhu
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiao-Min Xie
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhaoguo Zhang
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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11
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12
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Tobisu M, Ito S, Kitajima A, Chatani N. GaCl3- and TiCl4-Catalyzed Insertion of Isocyanides into a C−S Bond of Dithioacetals. Org Lett 2008; 10:5223-5. [DOI: 10.1021/ol802223a] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mamoru Tobisu
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, and Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Sana Ito
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, and Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Aki Kitajima
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, and Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, and Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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13
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Miki K, Kato Y, Uemura S, Ohe K. Catalytic Nucleophilic Addition Reaction to (2-Furyl)carbene Intermediates Generated from Carbonyl–Ene–Ynes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.1158] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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14
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Marsini MA, Huang Y, Lindsey CC, Wu KL, Pettus TRR. Diastereoselective syntheses of chroman spiroketals via [4 + 2] cycloaddition of enol ethers and o-quinone methides. Org Lett 2008; 10:1477-80. [PMID: 18336038 DOI: 10.1021/ol8003244] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A variety of chroman spiroketals are synthesized via inverse-demand [4 + 2] cycloaddition of enol ethers and ortho-quinone methides (o-QMs). Low temperature o-QM generation in situ allows for the kinetic, diastereoselective construction of these motifs, providing entry to a number of unusual chroman spiroketal natural products.
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Affiliation(s)
- Maurice A Marsini
- Department of Chemistry and Biochemistry, University of California at Santa Barbara Santa Barbara, California 93106-9510, USA
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Nikiforov GB, Roesky HW, Jones PG, Magull J, Ringe A, Oswald RB. Preparation of Ti(IV) FluorideN-Heterocyclic Carbene Complexes. Inorg Chem 2008; 47:2171-9. [DOI: 10.1021/ic701751r] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Grigory B. Nikiforov
- Institut für Anorganizche Chemie, Universität Göttingen, Tammannstrasse 4, D-37077, Göttingen, Germany
| | - Herbert W. Roesky
- Institut für Anorganizche Chemie, Universität Göttingen, Tammannstrasse 4, D-37077, Göttingen, Germany
| | - Peter G. Jones
- Institut für Anorganizche Chemie, Universität Göttingen, Tammannstrasse 4, D-37077, Göttingen, Germany
| | - Jörg Magull
- Institut für Anorganizche Chemie, Universität Göttingen, Tammannstrasse 4, D-37077, Göttingen, Germany
| | - Arne Ringe
- Institut für Anorganizche Chemie, Universität Göttingen, Tammannstrasse 4, D-37077, Göttingen, Germany
| | - Rainer B. Oswald
- Institut für Anorganizche Chemie, Universität Göttingen, Tammannstrasse 4, D-37077, Göttingen, Germany
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16
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Deb I, John S, Namboothiri IN. Synthesis of benzo-fused medium ring cyclic ethers via a Michael addition–ring closing metathesis strategy involving nitroaliphatic compounds. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.09.009] [Citation(s) in RCA: 14] [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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17
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Iyer K, Rainier JD. Olefinic ester and diene ring-closing metathesis using a reduced titanium alkylidene. J Am Chem Soc 2007; 129:12604-5. [PMID: 17900112 PMCID: PMC7077752 DOI: 10.1021/ja073880r] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karthik Iyer
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA
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Thomas E, Dixon S, Whitby RJ. A rearrangement to a zirconium-alkenylidene in the insertion of dihalocarbenoids and acetylides into zirconacycles. Angew Chem Int Ed Engl 2007; 45:7070-2. [PMID: 17009379 DOI: 10.1002/anie.200602822] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Emma Thomas
- School of Chemistry, University of Southampton, Southampton, Hants, UK
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Herndon JW. The chemistry of the carbon–transition metal double and triple bond: Annual survey covering the year 2005. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.11.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ogata A, Nemoto M, Kobayashi K, Tsubouchi A, Takeda T. Titanocene(II)-Promoted Multicomponent Reactions Utilizing Alkynyl Sulfones, Alkenyl Sulfones, and Carbonyl Compounds: A Novel Method for the Synthesis of Vinylallenes. Chemistry 2007; 13:1320-5. [PMID: 17072934 DOI: 10.1002/chem.200601326] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Titanocene(II)-promoted cross coupling of alkynyl- and (Z)-alkenyl sulfones affords alpha-(phenylsulfonyl)alkenyltitanium species. Further treatment of these species with the titanocene(II) reagent generates titanium vinylvinylidene complexes, which react with carbonyl compounds in one pot to produce substituted vinylallenes with complete stereoselectivity. By using alpha,beta-unsaturated ketones, 1,3,4,6-tetraenes are also obtained stereoselectively.
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Affiliation(s)
- Akitoshi Ogata
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
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Lee D, Kim M. Advances in the metallotropic [1,3]-shift of alkynyl carbenoids. Org Biomol Chem 2007; 5:3418-27. [DOI: 10.1039/b710379d] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Thomas E, Dixon S, Whitby RJ. A Rearrangement to a Zirconium–Alkenylidene in the Insertion of Dihalocarbenoids and Acetylides into Zirconacycles. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602822] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Ladipo FT. SYNTHESIS AND REACTIVITY OF WELL-CHARACTERIZED LOW-VALENT TITANIUM SPECIES. COMMENT INORG CHEM 2006. [DOI: 10.1080/02603590600767138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Cross WB, Anderson JC, Wilson C, Blake AJ. Molybdenum Oxo−Imido Aryloxide Complexes: Oxo Analogues of Olefin Metathesis Catalysts. Inorg Chem 2006; 45:4556-61. [PMID: 16711706 DOI: 10.1021/ic0521269] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The novel 16-electron molybdenum oxo-imido bis(aryloxide) complexes [Mo(NtBu)(O)(2,6-Me2C6H3O)2(py)] (1) and [Mo(NtBu)(O)(2,6-iPr2C6H3O)2(py)] (2) have been prepared by the salt elimination reactions of [Mo(NtBu)(O)Cl2(DME)] with the appropriate lithium aryloxide and from the cycloaddition reactions of tert-butyl isocyanate with the appropriate molybdenum dioxo bis(aryloxide) complex [Mo(O)2(OAr)2(py)n]. Complexes 1 and 2 are the first isolable and crystallographically characterized molybdenum oxo-imido aryloxide complexes. The geometry around the metal in complexes 1 and 2 is best described as a distorted trigonal bipyramid, with the imido and pyridine ligands occupying the axial positions and the oxo and aryloxide ligands in the equatorial plane. X-ray and IR data have confirmed that the imido ligand is the dominant pi donor in the complexes, resulting in an Mo-O bond order of less than 2.5. Reaction of [Mo(NtBu)(O)Cl2(DME)] with Li(OCH2tBu) instead gave the novel complex [Mo(NtBu)(OCH2tBu)3Cl(py)] (3).
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Affiliation(s)
- Warren B Cross
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, UK
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Shono T, Hayata Y, Tsubouchi A, Takeda T. Formation of conjugated dienes by the reaction of titanocene alkenylidene complexes with alkynes. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2005.12.070] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Mullins SM, Bergman RG, Arnold J. Olefination and group transfer reactions of an electron deficient tantalum methylidene complex. Dalton Trans 2006:203-12. [PMID: 16357978 DOI: 10.1039/b512741f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of an electronically unsaturated tantalum methylidene complex [TolC(NSiMe(3))(2)](2)Ta(CH(2))CH(3) supported by [TolC(NSiMe(3))(2)] amidinate ligands is described. Electrophilic addition and olefination reactions of the Ta=CH(2) functionality are reported. Alkylidene participates in group-transfer reactions not observed in sterically similar, but electronically saturated, analogues. Reactions with substrates containing unsaturated C-X (X = C, N, O) bonds yield [Ta]=X compounds and vinylated organic products; carbon-sulfur cleavage reactions to produce tantalum thioformaldehyde and tantalum sulfido complexes.
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Affiliation(s)
- Sarah M Mullins
- Department of Chemistry, University of California, Berkeley, CA 94720-1460, USA
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Takeda T, Ozaki M, Kuroi S, Tsubouchi A. Cyclopropanation and Carbonyl Olefination Utilizing 2-(Alk-1-yn-1-yl)-2-(trialkylsilyl)-1,3-dithianes via Regioselective Generation of Titanium Alkynylcarbene Complexes. J Org Chem 2005; 70:4233-9. [PMID: 15903295 DOI: 10.1021/jo050122f] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cp(2)Ti[P(OEt)(3)](2)-promoted reactions of 2-(alk-1-yn-1-yl)-2-(trialkylsilyl)-1,3-dithianes (RS)(2)C(Si)CCR with terminal olefins and carbonyl compounds produced (trialkylsilylethynyl)cyclopropanes and 1-(trialkylsilyl)alk-3-en-1-ynes, respectively. These compounds were suggest to be produced via the formation of intermediary titanium alpha-(trialkylsilylethynyl)carbene complexes Cp(2)Ti=C(R)CCSi in preference to their regioisomers, alpha-(trialkylsilyl)alkynylcarbene complexes Cp(2)Ti=C(Si)CCR.
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Affiliation(s)
- Takeshi Takeda
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan.
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