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Fischer M, Schmidtmann M, Beckhaus R. From Five to Five: Titanium Ketimine Complexes with Monoaza-butadiene η4-Coordination Mode and Hidden η2-Imine Reactivity. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00673] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Malte Fischer
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Marc Schmidtmann
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Rüdiger Beckhaus
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
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2
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Okamoto S, Ariki R, Tsujioka H, Sudo A. A Metal-Free Approach to 1,2-Diamines via Visible Light-Driven Reductive Coupling of Imines with Perylene as a Photoredox Catalyst. J Org Chem 2017; 82:9731-9736. [PMID: 28836438 DOI: 10.1021/acs.joc.7b01838] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A simple, metal-free, and versatile approach to 1,2-diamines has been developed based on reductive coupling reactions of various imines, where perylene, an aromatic hydrocarbon, was used as a photoredox catalyst under visible light irradiation using a white light-emitting diode. The use of 1 mol % perylene enabled almost complete conversion of the imines, leading to the formation of their corresponding 1,2-diamines, which were isolated in good yields. The ratios between dl and meso diamines ranged from 31:69 to 82:18 depending on the substituents of the imines.
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Affiliation(s)
- Shusuke Okamoto
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University , Kowakae 3-4-1, Higashiosaka, Osaka 577-8502, Japan
| | - Risako Ariki
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University , Kowakae 3-4-1, Higashiosaka, Osaka 577-8502, Japan
| | - Hiroki Tsujioka
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University , Kowakae 3-4-1, Higashiosaka, Osaka 577-8502, Japan
| | - Atsushi Sudo
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University , Kowakae 3-4-1, Higashiosaka, Osaka 577-8502, Japan
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3
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A novel one-pot synthesis of vicinal diamines with benzaldehyde and aniline derivatives mediated by BiCl3/Zn. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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4
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Matsumoto M, Harada M, Yamashita Y, Kobayashi S. Catalytic imine–imine cross-coupling reactions. Chem Commun (Camb) 2014; 50:13041-4. [DOI: 10.1039/c4cc06156j] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Titanium promoted reduction of imines with Grignards, silanes, and zinc: identification of a new mechanism with silanes. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.03.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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6
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Soueidan M, Hélion F, Namy JL, Szymoniak J. Homocoupling of aldimines mediated by zirconocene: synthesis of vicinal diamines and imidazolidines. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.01.075] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Kumar A, Samuelson AG. Diastereospecific Coupling of Imines by Low-Valent Titanium: An Experimental and Computational Study. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001256] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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8
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Gong JF, Wu YJ, Gui XL, Du CX, Zhu Y. Reductive Coupling Reaction of Aryliminomethylferrocenes with Triethyl Orthoformate Induced by Low-valent Titanium. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20010190916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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Graët A, Sinault L, Fusaro MB, Vallet AL, Seu C, Kilgore JL, Baum MM. Reactivity of the Nickel(0)−CO2−Imine System: New Pathway to Vicinal Diamines. Organometallics 2010. [DOI: 10.1021/om900765m] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexandre Graët
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - Laura Sinault
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - Maxime B. Fusaro
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - Anne-Laure Vallet
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - Candace Seu
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - James L. Kilgore
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - Marc M. Baum
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
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10
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Salt/ligand-activated low-valent titanium formulations: the ‘salt effect’ on diastereoselective carbon–carbon bond forming SET reactions. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.05.084] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Cheng X, Zhang J, Song H, Cui C. Synthesis and Characterization of the Monomeric Vicinal Dianion Li2(THF)3[ArNC(SiMe3)2] and the Aluminum and Lithium Derivatives of the Amido Ligand [ArNCH(SiMe3)2]−. Organometallics 2008. [DOI: 10.1021/om700972a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaoyan Cheng
- State Key Laboratory and Institute of Element-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Jianying Zhang
- State Key Laboratory and Institute of Element-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Haibin Song
- State Key Laboratory and Institute of Element-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Chunming Cui
- State Key Laboratory and Institute of Element-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
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12
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Jiang HF, Huang XZ. Synthesis of vicinal diamines via Zn–H2O–CO2-induced reduction of aromatic imines in supercritical carbon dioxide. J Supercrit Fluids 2007. [DOI: 10.1016/j.supflu.2007.07.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Mojtahedi MM, Saidi MR, Shirzi JS, Bolourtchian M. ULTRASOUND ACCELERATED REDUCTIVE COUPLING OF IMINE OR IMINIUM ION GENERATED IN 5 M LITHIUM PERCHLORATE SOLUTION BY LITHIUM METAL. SYNTHETIC COMMUN 2006. [DOI: 10.1081/scc-100107005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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14
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Vairaprakash P, Periasamy M. A Simple Method of Synthesis of (±)-2,3-Diarylpiperazines and a Novel Method of Resolution of (±)-2,3-Diphenylpiperazine. J Org Chem 2006; 71:3636-8. [PMID: 16626156 DOI: 10.1021/jo060083n] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intramolecular reductive coupling of diimines in the presence of Zn/Ti(O(i)Pr)2Cl2 gives the corresponding (+/-)-2,3-diarylpiperazines in 73-83% yields with dl/meso ratio >99%:<1%. The (+/-)-2,3-diphenylpiperazine obtained in this way was readily resolved partially using L-(+)-tartaric acid, and the enantiomeric purity was enhanced to >99% ee via preparation of hydrogen-bonded salt aggregates using oxalic acid.
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Affiliation(s)
- Pothiappan Vairaprakash
- School of Chemistry, University of Hyderabad, Central University P.O., Hyderabad 500 046, India
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15
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Kawaji T, Hayashi K, Hashimoto I, Matsumoto T, Thiemann T, Mataka S. Synthesis of 1,2,9,10-tetrakis(N-phenylamino)[2.2]metacyclophane by SmI2-mediated reductive coupling of diimine. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.06.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Intermolecular reductive coupling of hindered N-aryl imines towards the modular synthesis of chiral N-heterocyclic carbenes. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.03.124] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Rangareddy K, Selvakumar K, Harrod JF. Titanocene-Catalyzed Coupling of Aromatic Amides in the Presence of Organosilanes: A Novel Route to Vicinal Diamines and a New Class of Amine-Substituted Oligomers. J Org Chem 2004; 69:6843-50. [PMID: 15387610 DOI: 10.1021/jo049220b] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The title reaction has been surveyed for a number of substrates with differing substitution patterns. With a few exceptions, the methodology provides a one-pot synthesis of the 1,2-diamines from widely available and inexpensive starting materials, and in high yields. In addition, the coupling of 1,4- and 1,3-bis-(N,N,N',N'-tetraalkyl)arylenediamides is shown, under the same experimental conditions, to yield oligomers: R2NC(O)C6H4CH(NR2)-[CH(NR2)C6H4CH(NR2)]n-CH(NR2)C6H4C(O)-NR2 (R = methyl and ethyl; n = 0 to ca. 5). The chemical structures of these unprecedented oligomers are determined by comparison of NMR and MS spectra to those of vicinal diamines, prepared from the analogous N,N-dialkylbenzamides. The origin of the limitation of oligomer chain length is probably due to a specific effect of the internal benzylic amine group, since the substrate 4-Me2NCH2C6H4C(O)NMe2 was found to be uniquely unreactive compared to the other 4-substituted N,N-dialkylbenzamides investigated. N-Methylphthalimide was briefly studied as a monomer and analysis by MS showed that oligomers are formed. Attempts to fully characterize these polymers were unsuccessful.
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Affiliation(s)
- Kesamreddy Rangareddy
- Chemistry Department, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 2K6, Canada
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18
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Suga S, Suzuki S, Maruyama T, Yoshida JI. Generation of Carbon Free Radicals by Reduction of the Cation Pool. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2004. [DOI: 10.1246/bcsj.77.1545] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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Ortega M, Rodrı́guez MA, Campos PJ. Zn-mediated catalytic photoreduction of aldimines. One-pot synthesis and separation of meso and d,l C2 symmetrical diamines. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.06.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Sakai T, Korenaga T, Washio N, Nishio Y, Minami S, Ema T. Synthesis of Enantiomerically Pure (R,R)- and (S,S)-1,2-Bis(pentafluorophenyl)ethane-1,2-diamine and Evaluation of the pKaValue by Ab Initio Calculations. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2004. [DOI: 10.1246/bcsj.77.1001] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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K. Banik B, Banik I, Samajdar S, Wilson M. Facile Synthesis of Biologically Active Heterocycles by Indium-induced Reactions of Aromatic Nitro Compounds in Aqueous Ethanol. HETEROCYCLES 2004. [DOI: 10.3987/com-03-9914] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Yoo BW, Choi KH, Choi KI, Kim JH. Mild and Efficient Deoxygenation of Amine-N-oxides with Titanium Tetrachloride-Indium System. SYNTHETIC COMMUN 2003. [DOI: 10.1081/scc-120026845] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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23
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Coupling Reaction of Acyl Cyanides with Titanium Tetrachloride-Indium System: Synthesis of 1,2-Diketones. B KOREAN CHEM SOC 2003. [DOI: 10.5012/bkcs.2003.24.3.263] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Air- and moisture-stable cationic (diphosphine)palladium(II) complexes as hydroamination catalysts. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(02)02138-1] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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25
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Mild and Efficient Deoxygenation of Amine-N-Oxides with Bis(cyclopentadienyl)titanium(Ⅳ) Dichloride-Indium System. B KOREAN CHEM SOC 2002. [DOI: 10.5012/bkcs.2002.23.6.797] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Rele S, Banerji A, Talukdar S. Reductive Amination of Aliphatic Carbonyls using Low–valent Titanium Reagent: A Convenient Route to free Primary Amines. JOURNAL OF CHEMICAL RESEARCH 2002. [DOI: 10.3184/030823402103172040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A simple procedure for reductive amination of aliphatic carbonyls, giving direct access to free primary amines using low–valent titanium (LVT) reagent has been reported.
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Affiliation(s)
- Shyam Rele
- Bioorganic Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Asoke Banerji
- Bioorganic Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Sanjay Talukdar
- Bioorganic Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
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27
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Yoshimura N, Mukaiyama T. An Efficient Method for the Preparation of Vicinal Tertiary Diamines by Reductive Coupling of Aminoacetals Mediated by Low Valent Titanium Iodide Species. CHEM LETT 2001. [DOI: 10.1246/cl.2001.1334] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Rele S, Chattopadhyay S, Nayak SK. Highly active salted low-valent titanium reagents for various SET induced reactions. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)02009-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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Jeevanandam A, Ling YC. Indium-mediated tandem dimerization and cyclization of nitrqones and aldimines to 3-arylaminodihydrobenzofurans under aqueous conditions. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)00655-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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30
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Rele S, Talukdar S, Banerji A, Chattopadhyay S. Generation of reactive low-valent titanium species using metal--arenes as efficient organic reductants for TiCl(3): applications to organic synthesis. J Org Chem 2001; 66:2990-4. [PMID: 11325263 DOI: 10.1021/jo001586a] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A comprehensive study on the use of metal-arene systems as organic reductants for TiCl(3) has resulted in an efficient method for the generation of highly reactive low-valent titanium (LVT) reagents. The activated titanium species could be prepared by refluxing a mixture of substoichiometric amounts of arenes, TiCl(3), and Li/Mg in THF or DME. Among the LVT reagents screened, TiCl(3)--Li--naphthalene--THF (reagent I) was the best for coupling of carbonyls to olefins. The reagent could carry out the McMurry olefination of both aromatic and aliphatic substrates at a lower temperature and in a much reduced time as compared to the conventional procedures. Subtle changes in the method of preparation of the LVT reagents influenced the stereoisomeric ratio of the olefins. The reagent was also useful for the synthesis of O- and N- heterocycles and vicinal diamines via intramolecular carbonyl coupling and reductive duplication of imines, respectively.
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Affiliation(s)
- S Rele
- Bio-Organic Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
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31
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Kise N, Ueda N. Reductive coupling of aromatic oxims and azines to 1,2-diamines using Zn-MsOH or Zn-TiCl 4. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)00178-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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32
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Jin W, Makioka Y, Kitamura T, Fujiwara Y. A novel reductive dimerization/oxidative dehydrogenation of aldimines mediated by lanthanoid metals. J Org Chem 2001; 66:514-20. [PMID: 11429823 DOI: 10.1021/jo001328d] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A lanthanoid metal-mediated novel reductive dimerization/oxidative dehydrogenation of a variety of aldimines has been achieved. Aromatic aldimines (1) were dimerized in the presence of 0.5 mol of ytterbium metal (Yb) and 1-naphthaldehyde (1-NpCHO) to give the corresponding vicinal diimines (2) in good to high yields. Samarium metal (Sm) or samarium(II) diiodide (SmI2) gives unsatisfied yields under the same reaction conditions. As an oxidant, 1-NpCHO gives the best result. In addition, HMPA plays an important role as a cosolvent in this reaction. Reaction of various aldimines with Yb metal is discussed in detail. Moreover, it has been found that the electron-donating substitutents on the benzene ring promote the reaction and that the electron-withdrawing substitutents retard the reaction. The reaction of deuterated N-benzylideneaniline with Yb metal confirmed that transformation of the hydride occurred from aldimines to the oxidant aldehyde. The mechanism of the reaction was discussed.
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Affiliation(s)
- W Jin
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 6-10-1 Hakozaki, Higashiku, Fukuoka 812-8581, Japan
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33
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K. Banik B, Samajdar S, Ghatak A, F. Becker F. A Convenient Samarium-induced Reduction of Ferrocenyl Imines. HETEROCYCLES 2001. [DOI: 10.3987/com-01-9291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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34
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Ohtaka S, Mori K, Uemura S. Indium-catalyzed reductive coupling of aromatic carbonyl compounds and imines in the presence of aluminum and chlorosilanes. HETEROATOM CHEMISTRY 2001. [DOI: 10.1002/hc.1049] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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35
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Jeevanandam A, Cartwright C, Ling YC. Indium-Mediated Deoxygenation of Nitrones, N-Oxides and Deoxygenative Reductive Coupling of Nitrones to Vicinal Diamines. SYNTHETIC COMMUN 2000. [DOI: 10.1080/00397910008086924] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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36
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TiCl(4)-n-Bu(4)NI as a reducing reagent: pinacol coupling and enolate formation from alpha-haloketones. J Org Chem 2000; 65:5066-8. [PMID: 10956498 DOI: 10.1021/jo0004254] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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JEEVANANDAM A, LING YC, PANNEERSELVAM K. Crystal Structure of (R,S)-N,N'-Diphenyl-1,2-di(4-chlorophenyl)-1,2-ethylenediamine. ANAL SCI 2000. [DOI: 10.2116/analsci.16.189] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Reductive coupling of aromatic aldehydes and imines by the low valent titanium species generated in the reaction of TiCl4 with Et3N. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)01609-3] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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39
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Cabanal-Duvillard I, Mangeney P. Preparation of N,N′-aryl-disubstituted-1,2-diphenyl-1,2-diaminoethanes using palladium-catalyzed aromatic amino coupling. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)00612-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Machrouhi F, Namy JL. Samarium diiodide/nickel diiodide an efficient system for homo and heterocoupling reactions of imines. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(98)02673-2] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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41
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