51
|
Bi S, Wang J, Liu L, Li P, Lin Z. Mechanism of the MeReO3-Catalyzed Deoxygenation of Epoxides. Organometallics 2012. [DOI: 10.1021/om300485w] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Siwei Bi
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong Province, People’s
Republic of China
| | - Jiayong Wang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong Province, People’s
Republic of China
| | - Lingjun Liu
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong Province, People’s
Republic of China
| | - Ping Li
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong Province, People’s
Republic of China
| | - Zhenyang Lin
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People’s
Republic of China
| |
Collapse
|
52
|
Miller Y, Miao L, Hosseini AS, Chemler SR. Copper-catalyzed intramolecular alkene carboetherification: synthesis of fused-ring and bridged-ring tetrahydrofurans. J Am Chem Soc 2012; 134:12149-56. [PMID: 22720755 PMCID: PMC3430129 DOI: 10.1021/ja3034075] [Citation(s) in RCA: 139] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Fused-ring and bridged-ring tetrahydrofuran scaffolds are found in a number of natural products and biologically active compounds. A new copper-catalyzed intramolecular carboetherification of alkenes for the synthesis of bicyclic tetrahydrofurans is reported herein. The reaction involves Cu-catalyzed intramolecular addition of alcohols to unactivated alkenes and subsequent aryl C-H functionalization provides the C-C bond. Mechanistic studies indicate a primary carbon radical intermediate is involved and radical addition to the aryl ring is the likely C-C bond-forming mechanism. Preliminary catalytic enantioselective reactions are promising (up to 75% ee) and provide evidence that copper is involved in the alkene addition step, likely through a cis-oxycupration mechanism. Catalytic enantioselective alkene carboetherification reactions are rare and future development of this new method into a highly enantioselective process is promising. During the course of the mechanistic studies a protocol for alkene hydroetherification was also developed.
Collapse
Affiliation(s)
- Yan Miller
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States
| | - Lei Miao
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States
| | - Azade S. Hosseini
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States
| | - Sherry R. Chemler
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States
| |
Collapse
|
53
|
Liu Q, Zhao QY, Liu J, Wu P, Yi H, Lei A. A trans diacyloxylation of indoles. Chem Commun (Camb) 2012; 48:3239-41. [PMID: 22331283 DOI: 10.1039/c2cc17815j] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A trans diacyloxylation of indoles is accomplished by employing PhI(OAc)(2) as the oxidant. A broad range of functional groups are well tolerated. Both the electronic properties of the N-protecting groups of indoles and the acidity of the reaction media play important roles in the selectivity of indole acyloxylation reactions.
Collapse
Affiliation(s)
- Qiang Liu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, PR China
| | | | | | | | | | | |
Collapse
|
54
|
Kang YB, Gade LH. Triflic acid catalyzed oxidative lactonization and diacetoxylation of alkenes using peroxyacids as oxidants. J Org Chem 2012; 77:1610-5. [PMID: 22283591 DOI: 10.1021/jo202491y] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A clean and efficient diacetoxylation reaction of alkenes catalyzed by triflic acid using commercially available peroxyacids as the oxidants has been developed. This method was also applied in oxidative lactonizations of unsaturated carboxylic acids in good to high yields.
Collapse
Affiliation(s)
- Yan-Biao Kang
- Catalysis Research Laboratory (CaRLa), Im Neuenheimer Feld 584, 69120 Heidelberg, Germany
| | | |
Collapse
|
55
|
Ashikari Y, Nokami T, Yoshida JI. Oxidative hydroxylation mediated by alkoxysulfonium ions. Org Lett 2012; 14:938-41. [PMID: 22273445 DOI: 10.1021/ol203467v] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Oxidative hydroxylation of toluene derivatives via alkoxysulfonium ion intermediates was achieved by integration of anodic oxidation and hydrolysis to give benzyl alcohols which are also susceptible to oxidation. Alkenes were also oxidized to give 1,2-diols without overoxidation. The integration of electrochemical oxidative cyclization and hydrolysis was achieved using alkenes bearing a nitrogen atom in an appropriate position to give cyclic β-amino-substituted alcohols.
Collapse
Affiliation(s)
- Yosuke Ashikari
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | | | | |
Collapse
|
56
|
Jones KM, Tomkinson NCO. Metal-Free Dihydroxylation of Alkenes using Cyclobutane Malonoyl Peroxide. J Org Chem 2012; 77:921-8. [DOI: 10.1021/jo202084w] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Kevin M. Jones
- School of Chemistry, Main Building, Cardiff University, Park Place, Cardiff, CF10 3AT,
U. K
| | - Nicholas C. O. Tomkinson
- WestCHEM, Department
of Pure
and Applied Chemistry, Thomas Graham Building, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL,
U. K
| |
Collapse
|
57
|
Zhong W, Yang J, Meng X, Li Z. BF3·OEt2-Promoted Diastereoselective Diacetoxylation of Alkenes by PhI(OAc)2. J Org Chem 2011; 76:9997-10004. [DOI: 10.1021/jo201752y] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Wenhe Zhong
- The State Key Laboratory of Natural and Biomimetic
Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China
| | - Jun Yang
- The State Key Laboratory of Natural and Biomimetic
Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China
| | - Xiangbao Meng
- The State Key Laboratory of Natural and Biomimetic
Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China
| | - Zhongjun Li
- The State Key Laboratory of Natural and Biomimetic
Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China
| |
Collapse
|
58
|
Giglio BC, Schmidt VA, Alexanian EJ. Metal-Free, Aerobic Dioxygenation of Alkenes Using Simple Hydroxamic Acid Derivatives. J Am Chem Soc 2011; 133:13320-2. [DOI: 10.1021/ja206306f] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin C. Giglio
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Valerie A. Schmidt
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Erik J. Alexanian
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| |
Collapse
|
59
|
Pandit P, Gayen KS, Khamarui S, Chatterjee N, Maiti DK. Addition of halide to π-bond directly from aqueous NaX solution: a general strategy for installation of two different functional groups. Chem Commun (Camb) 2011; 47:6933-5. [PMID: 21597639 DOI: 10.1039/c1cc11685a] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Activation of π-bond with organic Lewis acid and cationic surfactant mediated direct transfer of halides to alkyne and alkene are demonstrated to afford α,α-dihaloketones and other valuable synthons with outstanding selectivities.
Collapse
Affiliation(s)
- Palash Pandit
- Department of Chemistry, University of Calcutta, University College of Science, 92, A. P. C. Road, Kolkata-700009, India
| | | | | | | | | |
Collapse
|
60
|
Intramolecular Oxidative C−N Bond Formation for the Synthesis of Carbazoles: Comparison of Reactivity between the Copper-Catalyzed and Metal-Free Conditions. J Am Chem Soc 2011; 133:5996-6005. [DOI: 10.1021/ja111652v] [Citation(s) in RCA: 453] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
|
61
|
Kang YB, Gade LH. The Nature of the Catalytically Active Species in Olefin Dioxygenation with PhI(OAc)2: Metal or Proton? J Am Chem Soc 2011; 133:3658-67. [DOI: 10.1021/ja110805b] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yan-Biao Kang
- Catalysis Research Laboratory (CaRLa), Im Neuenheimer Feld 584, 69120 Heidelberg, Germany
| | - Lutz H. Gade
- Catalysis Research Laboratory (CaRLa), Im Neuenheimer Feld 584, 69120 Heidelberg, Germany
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| |
Collapse
|
62
|
Fujita M, Wakita M, Sugimura T. Enantioselective Prévost and Woodward reactions using chiral hypervalent iodine(iii): switchover of stereochemical course of an optically active 1,3-dioxolan-2-yl cation. Chem Commun (Camb) 2011; 47:3983-5. [DOI: 10.1039/c1cc10129c] [Citation(s) in RCA: 124] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
63
|
|
64
|
Griffith JC, Jones KM, Picon S, Rawling MJ, Kariuki BM, Campbell M, Tomkinson NCO. Alkene Syn Dihydroxylation with Malonoyl Peroxides. J Am Chem Soc 2010; 132:14409-11. [DOI: 10.1021/ja1066674] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- James C. Griffith
- School of Chemistry, Main Building, Cardiff University, Park Place, Cardiff CF10 3AT, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Kevin M. Jones
- School of Chemistry, Main Building, Cardiff University, Park Place, Cardiff CF10 3AT, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Sylvain Picon
- School of Chemistry, Main Building, Cardiff University, Park Place, Cardiff CF10 3AT, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Michael J. Rawling
- School of Chemistry, Main Building, Cardiff University, Park Place, Cardiff CF10 3AT, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Benson M. Kariuki
- School of Chemistry, Main Building, Cardiff University, Park Place, Cardiff CF10 3AT, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Matthew Campbell
- School of Chemistry, Main Building, Cardiff University, Park Place, Cardiff CF10 3AT, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Nicholas C. O. Tomkinson
- School of Chemistry, Main Building, Cardiff University, Park Place, Cardiff CF10 3AT, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| |
Collapse
|