151
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Paixão M, Holub N, Vila C, Nielsen M, Jørgensen K. Trends in Organocatalytic Conjugate Addition to Enones: An Efficient Approach to Optically Active Alkynyl, Alkenyl, and Ketone Products. Angew Chem Int Ed Engl 2009; 48:7338-42. [DOI: 10.1002/anie.200903790] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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152
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Herron J, Russo V, Valente E, Ball Z. Catalytic Organocopper Chemistry from Organosiloxane Reagents. Chemistry 2009; 15:8713-6. [DOI: 10.1002/chem.200901438] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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153
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Biradar DB, Zhou S, Gau HM. Direct Asymmetric Catalytic Thienylaluminum Addition to Ketones: A Concise Approach to the Synthesis of (S)-Tiemonium Iodide. Org Lett 2009; 11:3386-9. [DOI: 10.1021/ol901193q] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Deepak B. Biradar
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, and Anhui Key Laboratory of Molecule-based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Shuangliu Zhou
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, and Anhui Key Laboratory of Molecule-based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Han-Mou Gau
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, and Anhui Key Laboratory of Molecule-based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
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154
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Nielsen M, Jacobsen CB, Paixão MW, Holub N, Jørgensen KA. Asymmetric Organocatalytic Formal Alkynylation and Alkenylation of α,β-Unsaturated Aldehydes. J Am Chem Soc 2009; 131:10581-6. [DOI: 10.1021/ja903920j] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Martin Nielsen
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | | | - Márcio W. Paixão
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Nicole Holub
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Karl Anker Jørgensen
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
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155
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Millet R, Bernardez T, Palais L, Alexakis A. Copper-catalyzed desymmetrization of oxabenzonorbornadienes with aluminum reagents. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.02.219] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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156
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Scarborough CC, Bergant A, Sazama GT, Guzei IA, Spencer LC, Stahl SS. Synthesis of Pd Complexes Bearing an Enantiomerically-Resolved Seven-Membered N-Heterocyclic Carbene Ligands and Initial Studies of their Use in Asymmetric Wacker-Type Oxidative Cyclization Reactions. Tetrahedron 2009; 65:5084-5092. [PMID: 20161255 DOI: 10.1016/j.tet.2009.04.072] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The development of enantiomerically-resolved, axially-chiral seven-membered N-heterocyclic carbene ((7)NHC) ligands for palladium is described. These (7)NHC ligands are derived from enatiomerically pure 2,2'-diamino-6,6'-dimethylbiphenyl, which is transformed via a synthetic sequence consisting of ortho-arylation, N-alkylation, and cyclization to afford seven-membered-ring amidinium salts. Synthesis of the 7-membered amidinium salts benefits from microwave irradiation, and in-situ metalation of the amidinium salts yields (7)NHC-Pd(II) complexes. The chiral (7)NHC-Pd complexes were examined as chiral catalysts under aerobic conditions in two intramolecular oxidative amination reactions of alkenes. In one case, enantioselectivities up to 63% e.e. were obtained, while the other substrate underwent cyclization to afford essentially racemic products. The catalytic data compare favorably to results obtained with a Pd(II) catalyst bearing a chiral five-membered-ring NHC ligand and, thereby, highlight the potential significance of this new class of chiral NHC ligands.
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157
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Lee KS, Hoveyda AH. Monodentate Non-C2-symmetric ChiralN-Heterocyclic Carbene Complexes for Enantioselective Synthesis. Cu-Catalyzed Conjugate Additions of Aryl- and Alkenylsilylfluorides to Cyclic Enones. J Org Chem 2009; 74:4455-62. [DOI: 10.1021/jo900589x] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kang-sang Lee
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - Amir H. Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
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158
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Zhou S, Wu KH, Chen CA, Gau HM. Highly Enantioselective Arylation of Aldehydes and Ketones Using AlArEt2(THF) as Aryl Sources. J Org Chem 2009; 74:3500-5. [DOI: 10.1021/jo900348p] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shuangliu Zhou
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, and Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Kuo-Hui Wu
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, and Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Chien-An Chen
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, and Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Han-Mou Gau
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, and Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
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159
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Biradar DB, Gau HM. Highly enantioselective vinyl additions of vinylaluminum to ketones catalyzed by a titanium(IV) catalyst of (S)-BINOL. Org Lett 2009; 11:499-502. [PMID: 19117491 DOI: 10.1021/ol801999u] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a novel asymmetric addition of vinyl group to ketones using vinylaluminum reagents catalyzed by in situ prepared Ti(O(i)Pr)(4) complexes of (S)-BINOL to afford diversified tertiary allylic alochols. Varieties of aromatic ketones bearing either an electron-donating or an electron-withdrawing substituent on the aromatic ring were examined to afford products in excellent enantioselectivities of up to 98% ee with high yields. A 10-fold scale-up reaction afforded the product in a similar yield with a comparable enantioselectivity. More importantly, additions of a variety of vinyl reagents including functionalized vinyls were demonstrated, affording tertiary allylic alcohols with good to excellent enantioselectivities of up to 96% ee.
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Affiliation(s)
| | - Han-Mou Gau
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan
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160
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Polet D, Rathgeb X, Falciola CA, Langlois JB, El Hajjaji S, Alexakis A. Enantioselective iridium-catalyzed allylic arylation. Chemistry 2009; 15:1205-16. [PMID: 19072966 DOI: 10.1002/chem.200801879] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
We describe herein the development of the first iridium-catalyzed allylic substitution using arylzinc nucleophiles. High enantioselectivities were obtained from the reactions, which used commercially available Grignard reagents as the starting materials. This methodology was also shown to be compatible with halogen/metal exchange reactions. Its synthetic potential is demonstrated by its application towards the formal synthesis of (+)-sertraline.
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Affiliation(s)
- Damien Polet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Genève 4, Switzerland
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161
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Onitsuka K. Recent Progress in Asymmetric Allylic Substitutions Catalyzed by Transition Metal Complexes. J SYN ORG CHEM JPN 2009. [DOI: 10.5059/yukigoseikyokaishi.67.584] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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162
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Bantreil X, Broggi J, Nolan SP. N-Heterocyclic carbene containing complexes in catalysis. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b822056p] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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163
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Selim KB, Yamada KI, Tomioka K. Copper-catalyzed asymmetric allylic substitution with aryl and ethyl Grignard reagents. Chem Commun (Camb) 2008:5140-2. [PMID: 18956048 DOI: 10.1039/b809140d] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phenyl- and ethyl-magnesium bromides undergo regioselective asymmetric allylic substitution with high enantioselectivity under the catalysis of chiral amidophosphane-copper(I) complexes.
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Affiliation(s)
- Khalid B Selim
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
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164
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Brown MK, Hoveyda AH. Enantioselective total synthesis of clavirolide C. Applications of Cu-catalyzed asymmetric conjugate additions and Ru-catalyzed ring-closing metathesis. J Am Chem Soc 2008; 130:12904-6. [PMID: 18778057 DOI: 10.1021/ja8058414] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first enantioselective total synthesis of clavirolide C, a member of the dolabellane family of diterpenes isolated from Pacific soft coral Clavularia viridis, is disclosed. The total synthesis features the application of chiral amino acid based ligands in Cu-catalyzed asymmetric conjugate addition (ACA) reactions and a relatively rare application of catalytic ring-closing metathesis to access an 11-membered ring structure. The total synthesis effort has spawned the development of a new protocol for NHC.Cu-catalyzed ACA of alkylaluminum reagents to beta-substituted cycloalkenones. The enantioselective clavirolide C synthesis requires 17 steps (longest linear sequence), affords the target molecule in 3.5% overall yield, and confirms the stereochemical assignment for the natural product.
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Affiliation(s)
- M Kevin Brown
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
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165
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May T, Brown MK, Hoveyda A. Enantioselective Synthesis of All-Carbon Quaternary Stereogenic Centers by Catalytic Asymmetric Conjugate Additions of Alkyl and Aryl Aluminum Reagents to Five-, Six-, and Seven-Membered-Ring β-Substituted Cyclic Enones. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200802910] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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166
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Alexakis A, Bäckvall JE, Krause N, Pàmies O, Diéguez M. Enantioselective copper-catalyzed conjugate addition and allylic substitution reactions. Chem Rev 2008; 108:2796-823. [PMID: 18671436 DOI: 10.1021/cr0683515] [Citation(s) in RCA: 802] [Impact Index Per Article: 50.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A Alexakis
- Departament of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Genève 4, Switzerland
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167
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Affiliation(s)
- Caroline A. Falciola
- Department of Organic Chemistry, University of Geneva 30 quai E. Ansermet, 1211 Geneva 4 (Switzerland)
| | - Alexandre Alexakis
- Department of Organic Chemistry, University of Geneva 30 quai E. Ansermet, 1211 Geneva 4 (Switzerland)
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168
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Falciola C, Tissot-Croset K, Reyneri H, Alexakis A. β- and γ-Disubstituted Olefins: Substrates for Copper-Catalyzed Asymmetric Allylic Substitution. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800086] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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169
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May TL, Brown MK, Hoveyda AH. Enantioselective synthesis of all-carbon quaternary stereogenic centers by catalytic asymmetric conjugate additions of alkyl and aryl aluminum reagents to five-, six-, and seven-membered-ring beta-substituted cyclic enones. Angew Chem Int Ed Engl 2008; 47:7358-62. [PMID: 18683828 PMCID: PMC2737810 DOI: 10.1002/anie.200802910] [Citation(s) in RCA: 174] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tricia L. May
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467 (USA)
| | - M. Kevin Brown
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467 (USA)
| | - Amir H. Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467 (USA)
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170
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Protti S, Fagnoni M. Phosphate esters as “tunable” reagents in organic synthesis. Chem Commun (Camb) 2008:3611-21. [DOI: 10.1039/b801888j] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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