101
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Nako AE, Oyamada J, Nishiura M, Hou Z. Scandium-catalysed intermolecular hydroaminoalkylation of olefins with aliphatic tertiary amines. Chem Sci 2016; 7:6429-6434. [PMID: 28451099 PMCID: PMC5356020 DOI: 10.1039/c6sc02129h] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 07/03/2016] [Indexed: 12/25/2022] Open
Abstract
A homoleptic scandium trialkyl complex in combination with a borate compound served as an excellent catalyst for the C-H addition of aliphatic tertiary amines to olefins. This highly regiospecific, 100% atom efficient C-H bond alkylation reaction was applicable to a wide variety of tertiary amines and olefins, including functionalised styrenes and unactivated α-olefins. This work represents the first example of rare-earth catalysed olefin hydroaminoalkylation and also the first example of catalytic C-H addition of aliphatic tertiary amines to olefins with any catalyst.
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Affiliation(s)
- Adi E Nako
- Organometallic Chemistry Laboratory and RIKEN Center for Sustainable Resource Science , RIKEN , 2-1 Hirosawa, Wako , Saitama , 351-0198 , Japan .
| | - Juzo Oyamada
- Organometallic Chemistry Laboratory and RIKEN Center for Sustainable Resource Science , RIKEN , 2-1 Hirosawa, Wako , Saitama , 351-0198 , Japan .
| | - Masayoshi Nishiura
- Organometallic Chemistry Laboratory and RIKEN Center for Sustainable Resource Science , RIKEN , 2-1 Hirosawa, Wako , Saitama , 351-0198 , Japan .
| | - Zhaomin Hou
- Organometallic Chemistry Laboratory and RIKEN Center for Sustainable Resource Science , RIKEN , 2-1 Hirosawa, Wako , Saitama , 351-0198 , Japan .
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102
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Gu K, Zhang Z, Bao Z, Xing H, Yang Q, Ren Q. Thiourea-Catalyzed Cross-Dehydrogenative Coupling of C(sp3)-H with Diethyl Phosphite. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600801] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kai Gu
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education; College of Chemical and Biological Engineering; Zhejiang University; Zheda Road 38 310027 Hangzhou P. R. China
| | - Zhiguo Zhang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education; College of Chemical and Biological Engineering; Zhejiang University; Zheda Road 38 310027 Hangzhou P. R. China
| | - Zongbi Bao
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education; College of Chemical and Biological Engineering; Zhejiang University; Zheda Road 38 310027 Hangzhou P. R. China
| | - Huabin Xing
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education; College of Chemical and Biological Engineering; Zhejiang University; Zheda Road 38 310027 Hangzhou P. R. China
| | - Qiwei Yang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education; College of Chemical and Biological Engineering; Zhejiang University; Zheda Road 38 310027 Hangzhou P. R. China
| | - Qilong Ren
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education; College of Chemical and Biological Engineering; Zhejiang University; Zheda Road 38 310027 Hangzhou P. R. China
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103
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Batra A, Singh P, Singh KN. Cross Dehydrogenative Coupling (CDC) Reactions ofN,N-Disubstituted Formamides, Benzaldehydes and Cycloalkanes. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600401] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Aanchal Batra
- Department of Chemistry; DAV College; Sec 10-D Chandigarh India
| | - Paramjit Singh
- Department of Chemistry and Centre of Advanced Studies in Chemistry; Panjab University; 160014 Chandigarh India
| | - Kamal Nain Singh
- Department of Chemistry and Centre of Advanced Studies in Chemistry; Panjab University; 160014 Chandigarh India
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104
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Torigoe T, Ohmura T, Suginome M. Iridium-Catalyzed Intramolecular Methoxy C−H Addition to Carbon-Carbon Triple Bonds: Direct Synthesis of 3-Substituted Benzofurans from o
-Methoxyphenylalkynes. Chemistry 2016; 22:10415-9. [DOI: 10.1002/chem.201602152] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Indexed: 02/04/2023]
Affiliation(s)
- Takeru Torigoe
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University, Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Toshimichi Ohmura
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University, Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University, Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
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105
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Kumar M, Kaur BP, Chimni SS. 2,4-Dinitrophenol-Catalyzed α-C(sp3
)−H and C(sp)−H Bond Functionalization of Cyclic Amines and Alkynes: Highly Regio-/Diastereoselective Synthesis of α-Alkynyl-3-Amino-2-Oxindoles. Chemistry 2016; 22:9948-52. [DOI: 10.1002/chem.201601222] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 04/14/2016] [Indexed: 01/03/2023]
Affiliation(s)
- Mukesh Kumar
- Department of Chemistry; U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University Amritsar; 143005 Amritsar India
| | - Banni P. Kaur
- Department of Chemistry; U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University Amritsar; 143005 Amritsar India
| | - Swapandeep S Chimni
- Department of Chemistry; U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University Amritsar; 143005 Amritsar India
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106
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Perez F, Oda S, Geary LM, Krische MJ. Ruthenium-Catalyzed Transfer Hydrogenation for C-C Bond Formation: Hydrohydroxyalkylation and Hydroaminoalkylation via Reactant Redox Pairs. Top Curr Chem (Cham) 2016; 374:35. [PMID: 27573275 DOI: 10.1007/s41061-016-0028-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 04/20/2016] [Indexed: 12/12/2022]
Abstract
Merging the chemistry of transfer hydrogenation and carbonyl or imine addition, a broad new family of redox-neutral or reductive hydrohydroxyalkylations and hydroaminomethylations have been developed. In these processes, hydrogen redistribution between alcohols and π-unsaturated reactants is accompanied by C-C bond formation, enabling direct conversion of lower alcohols to higher alcohols. Similarly, hydrogen redistribution between amines to π-unsaturated reactants results in direct conversion of lower amines to higher amines. Alternatively, equivalent products of hydrohydroxyalkylation and hydroaminomethylation may be generated through the reaction of carbonyl compounds or imines with π-unsaturated reactants under the conditions of 2-propanol-mediated reductive coupling. Finally, using vicinally dioxygenated reactants, that is, diol, ketols, or diones, successive transfer hydrogenative coupling occurs to generate 2 C-C bonds, resulting in products of formal [4+2] cycloaddition.
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Affiliation(s)
- Felix Perez
- Department of Chemistry, University of Texas at Austin, 105 E 24th St., A5300, Austin, TX, 78712-1167, USA
| | - Susumu Oda
- Department of Chemistry, University of Texas at Austin, 105 E 24th St., A5300, Austin, TX, 78712-1167, USA
| | - Laina M Geary
- Department of Chemistry, University of Texas at Austin, 105 E 24th St., A5300, Austin, TX, 78712-1167, USA.,Department of Chemistry, University of Nevada, 1664 N Virginia St., Reno, NV, 89557, USA
| | - Michael J Krische
- Department of Chemistry, University of Texas at Austin, 105 E 24th St., A5300, Austin, TX, 78712-1167, USA.
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107
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White R, Bennett T, Golovko V, Andersson GG, Metha GF. A Systematic Density Functional Theory Study of the Complete De-ligation of Ru3(CO)12. ChemistrySelect 2016. [DOI: 10.1002/slct.201600082] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Reuben White
- Department of Chemistry; University of Adelaide; South Australia 5005 AUSTRALIA
| | - Trystan Bennett
- Department of Chemistry; University of Adelaide; South Australia 5005 AUSTRALIA
| | - Vladimir Golovko
- The MacDiarmid Institute for Advanced Materials and Nanotechnology; Department of Chemistry; University of Canterbury; Christchurch 8140 NEW ZEALAND
| | - Gunther G. Andersson
- Flinders Centre for NanoScale Science and Technology; Flinders University; Adelaide SA 5001 AUSTRALIA
| | - Gregory F. Metha
- Department of Chemistry; University of Adelaide; South Australia 5005 AUSTRALIA
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108
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Ye Z, Gettys KE, Dai M. Opportunities and challenges for direct C-H functionalization of piperazines. Beilstein J Org Chem 2016; 12:702-15. [PMID: 27340462 PMCID: PMC4901899 DOI: 10.3762/bjoc.12.70] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 03/21/2016] [Indexed: 12/14/2022] Open
Abstract
Piperazine ranks within the top three most utilized N-heterocyclic moieties in FDA-approved small-molecule pharmaceuticals. Herein we summarize the current synthetic methods available to perform C-H functionalization on piperazines in order to lend structural diversity to this privileged drug scaffold. Multiple approaches such as those involving α-lithiation trapping, transition-metal-catalyzed α-C-H functionalizations, and photoredox catalysis are discussed. We also highlight the difficulties experienced when successful methods for α-C-H functionalization of acyclic amines and saturated mono-nitrogen heterocyclic compounds (such as piperidines and pyrrolidines) were applied to piperazine substrates.
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Affiliation(s)
- Zhishi Ye
- Department of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
| | - Kristen E Gettys
- Department of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
| | - Mingji Dai
- Department of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
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109
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Shi XY, Han WJ, Li CJ. Transition-Metal-Catalyzed Direct Addition of Aryl C-H Bonds to Unsaturated Electrophiles. CHEM REC 2016; 16:1178-90. [DOI: 10.1002/tcr.201500250] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Indexed: 01/28/2023]
Affiliation(s)
- Xian-Ying Shi
- Key Laboratory for Macromolecular Science of Shaanxi Province; Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education)
| | - Wen-Jing Han
- Key Laboratory for Macromolecular Science of Shaanxi Province; Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education)
| | - Chao-Jun Li
- Department of Chemistry; McGill University; 801 Sherbooke Street W. Montreal Quebec H3A 0B8 Canada
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110
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Huang FQ, Dong X, Qi LW, Zhang B. Visible-light photocatalytic α-amino C(sp3)–H activation through radical translocation: a novel and metal-free approach to α-alkoxybenzamides. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.02.108] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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111
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Miao T, Xia D, Li Y, Li P, Wang L. Direct difunctionalization of activated alkynes via domino oxidative benzylation/1,4-aryl migration/decarboxylation reactions under metal-free conditions. Chem Commun (Camb) 2016; 52:3175-8. [DOI: 10.1039/c5cc10084d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The oxidative difunctionalization of aryl alkynoatesviaa tandem oxidative benzylation/1,4-aryl migration/decarboxylation to trisubstituted alkenes was developed under metal-free conditions.
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Affiliation(s)
- Tao Miao
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
| | - Dong Xia
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
| | - Yang Li
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
| | - Pinhua Li
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
| | - Lei Wang
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
- State Key Laboratory of Organometallic Chemistry
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112
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Chen X, Han J, Zhu Y, Yuan C, Zhang J, Zhao Y. Transformation of masked benzyl alcohols to o-aminobenzaldehydes through C–H activation: a facile approach to quinazolines. Chem Commun (Camb) 2016; 52:10241-4. [DOI: 10.1039/c6cc05560e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A decorating strategy has been developed for the synthesis of important synthetic units from benzyl alcohols through C–H functionalization.
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Affiliation(s)
- Xiaolan Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science, Soochow University
- Suzhou 215123
- P. R. China
| | - Jian Han
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science, Soochow University
- Suzhou 215123
- P. R. China
| | - Yan Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science, Soochow University
- Suzhou 215123
- P. R. China
| | - Chunchen Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science, Soochow University
- Suzhou 215123
- P. R. China
| | - Jingyu Zhang
- College of Physics
- Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology
- Soochow University
- Suzhou 215006
- P. R. China
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science, Soochow University
- Suzhou 215123
- P. R. China
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113
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Maes J, Maes BU. A Journey Through Metal-Catalyzed C H Functionalization of Heterocycles. ADVANCES IN HETEROCYCLIC CHEMISTRY 2016. [DOI: 10.1016/bs.aihch.2016.04.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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114
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Kianmehr E, Faghih N, Karaji S, Amiri Lomedasht Y, Khan KM. Copper-catalyzed cross-dehydrogenative coupling of pyridine N-oxides with cyclic ethers. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2015.10.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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115
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Beng TK, Langevin S, Braunstein H, Khim M. Regiocontrolled synthesis of (hetero)aryl and alkenyl dehydropyrrolidines, dehydropiperidines and azepenes by Ru-catalyzed, heteroatom-directed α-C–H activation/cross-coupling of cyclic enamides with boronic acids. Org Biomol Chem 2016; 14:830-4. [DOI: 10.1039/c5ob02263k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The synthesis of α-aryl and alkenyl pyrrolidine-, piperidine-, and azepane derivatives by ruthenium-catalyzed, carbonyl-assisted, site-selective sp2 C–H activation of cyclic enamides and concomitant cross-coupling with boronic acids is described.
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Affiliation(s)
- Timothy K. Beng
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | - Spencer Langevin
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | | | - Monique Khim
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
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116
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Huang FQ, Zhou GX, Dong X, Qi LW, Zhang B. Metal-Free C(sp3)-O Bond Formation through Radical Translocation: A Mild, Efficient, and Practical Approach to α-Alkoxybenzamides. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500495] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Feng-Qing Huang
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjia Xiang Nanjing 210009 China
| | - Guo-Xiu Zhou
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjia Xiang Nanjing 210009 China
| | - Xin Dong
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjia Xiang Nanjing 210009 China
| | - Lian-Wen Qi
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjia Xiang Nanjing 210009 China
| | - Bo Zhang
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjia Xiang Nanjing 210009 China
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117
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Spangler JE, Kobayashi Y, Verma P, Wang DH, Yu JQ. α-Arylation of Saturated Azacycles and N-Methylamines via Palladium(II)-Catalyzed C(sp(3))-H Coupling. J Am Chem Soc 2015; 137:11876-9. [PMID: 26322957 PMCID: PMC4822695 DOI: 10.1021/jacs.5b06740] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Pd(II)-catalyzed α-C(sp(3))-H arylation of pyrrolidines, piperidines, azepanes, and N-methylamines with arylboronic acids has been developed for the first time. This transformation is applicable to wide arrays of pyrrolidines and boronic acids, including heteroaromatic boronic acids. A diastereoselective one-pot heterodiarylation of pyrrolidines has also been achieved.
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Affiliation(s)
- Jillian E. Spangler
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037
| | - Yoshihisa Kobayashi
- Medicinal Chemistry, Eisai Product Creation Systems, Eisai Co., Ltd, 5-1-3 Tokodai, Tsukuba-shi, Ibaraki 300-2635, Japan
| | - Pritha Verma
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037
| | - Dong-Hui Wang
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037
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118
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Dörfler J, Preuss T, Brahms C, Scheuer D, Doye S. Intermolecular hydroaminoalkylation of alkenes and dienes using a titanium mono(formamidinate) catalyst. Dalton Trans 2015; 44:12149-68. [PMID: 25679294 DOI: 10.1039/c4dt03916e] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An easily accessible formamidinate ligand-bearing titanium complex initially synthesized by Eisen et al. is used as catalyst for intermolecular hydroaminoalkylation reactions of unactivated, sterically demanding 1,1- and 1,2-disubstituted alkenes and styrenes with secondary amines. The corresponding reactions, which have never been achieved with titanium catalysts before, take place with excellent regioselectivity (up to 99 : 1) and in addition, corresponding reactions of 1,3-butadienes with N-methylbenzylamine are also described for the first time.
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Affiliation(s)
- Jaika Dörfler
- Institut für Chemie, Universität Oldenburg, Carl-von-Ossietzky-Strasse 9-11, D-26111 Oldenburg, Germany.
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119
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Lühning LH, Brahms C, Nimoth JP, Schmidtmann M, Doye S. A NewN-Trityl-Substituted Aminopyridinato Titanium Catalyst for Hydroamination and Hydroaminoalkylation Reactions - Unexpected Intramolecular C-H Bond Activation. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500542] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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120
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Dörfler J, Bytyqi B, Hüller S, Mann NM, Brahms C, Schmidtmann M, Doye S. An Aminopyridinato Titanium Catalyst for the Intramolecular Hydroaminoalkylation of Secondary Aminoalkenes. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500287] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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121
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Maity S, Agasti S, Earsad AM, Hazra A, Maiti D. Nickel-Catalyzed Insertion of Alkynes and Electron-Deficient Olefins into Unactivated sp(3) C-H Bonds. Chemistry 2015; 21:11320-4. [PMID: 26121618 DOI: 10.1002/chem.201501962] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Indexed: 11/08/2022]
Abstract
Insertion of unsaturated systems such as alkynes and olefins into unactivated sp(3) C-H bonds remains an unexplored problem. We herein address this issue by successfully incorporating a wide variety of functionalized alkynes and electron-deficient olefins into the unactivated sp(3) C-H bond of pivalic acid derivatives with excellent syn- and linear- selectivity. A strongly chelating 8-aminoquinoline directing group proved beneficial for these insertion reactions, while an air-stable and inexpensive Ni(II) salt has been employed as the active catalyst.
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Affiliation(s)
- Soham Maity
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India)
| | - Soumitra Agasti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India)
| | - Arif Mahammad Earsad
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India)
| | - Avijit Hazra
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India)
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India).
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122
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Synthesis of 2-benzoylpyrrole derivatives via C–H functionalization adjacent to nitrogen of pyrrole. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.118] [Citation(s) in RCA: 8] [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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123
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Kianmehr E, Torabi M, Rezazadeh Khalkhali M, Faghih N, Khan KM. Palladium-Catalyzed Regioselective Cross-Dehydrogenative Coupling of Benzofurans with Uracils at Room Temperature. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500042] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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124
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Cheng H, Dong W, Dannenberg CA, Dong S, Guo Q, Bolm C. Ruthenium-Catalyzed Hydroarylations of Oxa- and Azabicyclic Alkenes. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00258] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hanchao Cheng
- Institute of Organic Chemistry and ‡Institute of Inorganic
Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Wanrong Dong
- Institute of Organic Chemistry and ‡Institute of Inorganic
Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Carl Albrecht Dannenberg
- Institute of Organic Chemistry and ‡Institute of Inorganic
Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Shunxi Dong
- Institute of Organic Chemistry and ‡Institute of Inorganic
Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Qianqian Guo
- Institute of Organic Chemistry and ‡Institute of Inorganic
Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Carsten Bolm
- Institute of Organic Chemistry and ‡Institute of Inorganic
Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
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125
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Pereira R, Otth E, Cvengroš J. Chemo- and Stereoselective NBS-Promoted Intermolecular Oxygenation and Nitrogenation of α-C-H Bonds of Tertiary Diamines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500062] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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126
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Chen TY, Tsutsumi R, Montgomery TP, Volchkov I, Krische MJ. Ruthenium-catalyzed C-C coupling of amino alcohols with dienes via transfer hydrogenation: redox-triggered imine addition and related hydroaminoalkylations. J Am Chem Soc 2015; 137:1798-801. [PMID: 25642996 DOI: 10.1021/ja5130258] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Ruthenium-catalyzed hydrogen transfer from 4-aminobutanol to butadiene results in the pairwise generation of 3,4-dihydro-2H-pyrrole and an allylruthenium complex, which combine to form products of imine anti-crotylation. In couplings of 1-substituted-1,3-dienes, novel C2 regioselectivity is observed. As corroborated by deuterium labeling studies, kinetically preferred hydrometalation of the terminal olefin of the 1-substituted-1,3-diene delivers a 1,1-disubstituted π-allylruthenium complex that isomerizes to a thermodynamically more stable monosubstituted π-allylruthenium complex, which undergoes imine addition with allylic inversion through a closed transition structure. Direct ruthenium-catalyzed diene hydroaminoalkylations with pyrrolidine also are described.
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Affiliation(s)
- Te-Yu Chen
- Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
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127
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Ramulu BJ, Nagaraju A, Chowdhury S, Koley S, Singh MS. Metal-Free Reagent Dependent SS and CC Homocoupling of α-Enolic Dithioesters at Room Temperature: Direct Access to Fully Substituted Symmetrical ThiophenesviaChemoselective Paal-Knorr Approach. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400828] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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128
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Kinuta H, Tobisu M, Chatani N. Rhodium-Catalyzed Borylation of Aryl 2-Pyridyl Ethers through Cleavage of the Carbon–Oxygen Bond: Borylative Removal of the Directing Group. J Am Chem Soc 2015; 137:1593-600. [DOI: 10.1021/ja511622e] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Hirotaka Kinuta
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Mamoru Tobisu
- Center
for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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129
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Li J, Ackermann L. Carboxylate-assisted ruthenium(ii)-catalyzed C–H activations of monodentate amides with conjugated alkenes. Org Chem Front 2015. [DOI: 10.1039/c5qo00167f] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carboxylate assistance enabled efficient and chemoselective ruthenium(ii)-catalyzed hydroarylations of α,β-unsaturated ketones via C–H activation on monodentate benzamides.
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Affiliation(s)
- Jie Li
- Institut für Organische und Biomolekulare Chemie
- Georg-August-Universität Göttingen
- 37077 Göttingen
- Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie
- Georg-August-Universität Göttingen
- 37077 Göttingen
- Germany
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130
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131
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Affron DP, Davis OA, Bull JA. Regio- and Stereospecific Synthesis of C-3 Functionalized Proline Derivatives by Palladium Catalyzed Directed C(sp3)–H Arylation. Org Lett 2014; 16:4956-9. [DOI: 10.1021/ol502511g] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Dominic P. Affron
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Owen A. Davis
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - James A. Bull
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
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132
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Zhan M, Jiang H, Pang X, Zhang T, Xu R, Zhao L, Liu Y, Gong Y, Chen Y. A convenient method for the Ru(0)-catalyzed regioselective deuteration of N-alkyl-substituted anilines. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.07.071] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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133
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Lahm G, Opatz T. Unique regioselectivity in the C(sp3)-H α-alkylation of amines: the benzoxazole moiety as a removable directing group. Org Lett 2014; 16:4201-3. [PMID: 25057785 DOI: 10.1021/ol501935d] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The benzoxazol-2-yl- substituent was found to act as a removable activating and directing group in the Ir-catalyzed alkylation of C(sp(3))-H bonds adjacent to nitrogen in secondary amines. It can be easily introduced by oxidative coupling or by an SNAr reaction, and it can be removed by hydroxide or by hydride reduction. For 1,2,3,4-tetrahydroisoquinolines, activation exclusively takes place in the 3-position. A variety of activated as well as unactivated terminal olefins are suitable reaction partners.
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Affiliation(s)
- Günther Lahm
- Institute of Organic Chemistry, Johannes Gutenberg-University , Duesbergweg 10-14, 55128 Mainz, Germany
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134
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Chong E, Brandt JW, Schafer LL. 2-Pyridonate tantalum complexes for the intermolecular hydroaminoalkylation of sterically demanding alkenes. J Am Chem Soc 2014; 136:10898-901. [PMID: 25041474 DOI: 10.1021/ja506187m] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The design and synthesis of a mixed 2-pyridonate-Ta(NMe2)3Cl complex for the direct C-H alkylation adjacent to nitrogen in unprotected secondary amines are reported. The hydroaminoalkylation of sterically demanding internal alkenes gives the direct, catalytic formation of C(sp(3))-C(sp(3)) bonds. Substrate scope investigations reveal key strategies for further catalyst development efforts in this 100% atom-economic synthesis of α-alkylated amines.
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Affiliation(s)
- Eugene Chong
- Department of Chemistry, University of British Columbia , 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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135
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Peng J, Chen C, Chen J, Su X, Xi C, Chen H. Cu-catalyzed arylcarbocyclization of alkynes with diaryliodonium salts through C-C bond formation on inert C(sp3)-H bond. Org Lett 2014; 16:3776-9. [PMID: 25008539 DOI: 10.1021/ol501655g] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Copper-catalyzed arylcarbocyclization reaction of alkynes was realized with diaryliodonium salts through C-C bond formation on an inert C(sp3)-H bond. This method provides an efficient cyclization of alkyl alkynes to generate carbocycles with good step-economy. Theoretical study revealed an interesting Cu-catalyzed concerted pathway of the C-C bond formation.
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Affiliation(s)
- Jing Peng
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University , Beijing 100084, China
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136
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Zhao J, Fang H, Han J, Pan Y, Li G. Metal-Free Preparation of Cycloalkyl Aryl Sulfides via Di-tert-butyl Peroxide-Promoted Oxidative C(sp3)[BOND]H Bond Thiolation of Cycloalkanes. Adv Synth Catal 2014; 356:2719-2724. [PMID: 25505857 DOI: 10.1002/adsc.201400032] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A concise thiolation of C(sp3)-H bond of cycloalkanes with diaryl disulfides in the presence of oxidant of di-tert-butylperoxide (DTBP) has been developed. This reaction without using any of metal catalyst, tolerates varieties of disulfides and cycloalkanes substrates, giving good to excellent chemical yields, which provides a useful approach to cycloalkyl aryl sulfides from unactivated cycloalkanes.
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Affiliation(s)
- Jincan Zhao
- School of Chemistry and Chemical Engineering, State of Key laboratory of Coordination, Nanjing University, Nanjing, 210093, China
| | - Hong Fang
- School of Chemistry and Chemical Engineering, State of Key laboratory of Coordination, Nanjing University, Nanjing, 210093, China
| | - Jianlin Han
- School of Chemistry and Chemical Engineering, State of Key laboratory of Coordination, Nanjing University, Nanjing, 210093, China ; Institute for Chemistry & BioMedical Sciences, Nanjing University
| | - Yi Pan
- School of Chemistry and Chemical Engineering, State of Key laboratory of Coordination, Nanjing University, Nanjing, 210093, China
| | - Guigen Li
- Institute for Chemistry & BioMedical Sciences, Nanjing University ; Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, 79409-1061, USA
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137
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Dörfler J, Preuß T, Schischko A, Schmidtmann M, Doye S. A 2,6-bis(phenylamino)pyridinato titanium catalyst for the highly regioselective hydroaminoalkylation of styrenes and 1,3-butadienes. Angew Chem Int Ed Engl 2014; 53:7918-22. [PMID: 24938211 DOI: 10.1002/anie.201403203] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Indexed: 11/10/2022]
Abstract
The C-C bond forming catalytic hydroaminoalkylation of terminal alkenes, 1,3-dienes, or styrenes allows a direct and highly atom efficient (100 %) synthesis of amines which can result in the formation of two regioisomers, the linear and the branched product. We present a new titanium catalyst with 2,6-bis(phenylamino)pyridinato ligands for intermolecular hydroaminoalkylation reactions of styrenes and 1-phenyl-1,3-butadienes that delivers the corresponding linear hydroaminoalkylation products with excellent regioselectivities.
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Affiliation(s)
- Jaika Dörfler
- Institut für Chemie, Universität Oldenburg, Carl-von-Ossietzky-Strasse 9-11, 26111 Oldenburg (Germany)
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138
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Dörfler J, Preuß T, Schischko A, Schmidtmann M, Doye S. Ein 2,6-Bis(phenylamino)pyridinato-Titan-Katalysator für die hoch regioselektive Hydroaminoalkylierung von Styrolen und 1,3-Butadienen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403203] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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139
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Cannon J, Zou L, Liu P, Lan Y, O’Leary DJ, Houk KN, Grubbs RH. Carboxylate-assisted C(sp³)-H activation in olefin metathesis-relevant ruthenium complexes. J Am Chem Soc 2014; 136:6733-43. [PMID: 24731019 PMCID: PMC4017616 DOI: 10.1021/ja5021958] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Indexed: 12/15/2022]
Abstract
The mechanism of C-H activation at metathesis-relevant ruthenium(II) benzylidene complexes was studied both experimentally and computationally. Synthesis of a ruthenium dicarboxylate at a low temperature allowed for direct observation of the C-H activation step, independent of the initial anionic ligand-exchange reactions. A first-order reaction supports an intramolecular concerted metalation-deprotonation mechanism with ΔG(‡)(298K) = 22.2 ± 0.1 kcal·mol(-1) for the parent N-adamantyl-N'-mesityl complex. An experimentally determined ΔS(‡) = -5.2 ± 2.6 eu supports a highly ordered transition state for carboxylate-assisted C(sp(3))-H activation. Experimental results, including measurement of a large primary kinetic isotope effect (k(H)/k(D) = 8.1 ± 1.7), agree closely with a computed six-membered carboxylate-assisted C-H activation mechanism where the deprotonating carboxylate adopts a pseudo-apical geometry, displacing the aryl ether chelate. The rate of cyclometalation was found to be influenced by both the electronics of the assisting carboxylate and the ruthenium ligand environment.
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Affiliation(s)
- Jeffrey
S. Cannon
- Arnold
and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry
and Chemical Engineering, California Institute
of Technology, Pasadena, California 91125, United States
| | - Lufeng Zou
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095-1569, United States
| | - Peng Liu
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095-1569, United States
| | - Yu Lan
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095-1569, United States
| | - Daniel J. O’Leary
- Department
of Chemistry, Pomona College, Claremont, California 91711, United States
| | - K. N. Houk
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095-1569, United States
| | - Robert H. Grubbs
- Arnold
and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry
and Chemical Engineering, California Institute
of Technology, Pasadena, California 91125, United States
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140
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Kulago AA, Van Steijvoort BF, Mitchell EA, Meerpoel L, Maes BUW. Directed Ruthenium‐Catalyzed C(
sp
3
)H α‐Alkylation of Cyclic Amines Using Dioxolane‐Protected Alkenones. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400117] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Artem A. Kulago
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B‐2020 Antwerp, Belgium, Fax: (+32)‐32‐653‐233; phone: (+32)‐32‐653‐205
| | - Ben F. Van Steijvoort
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B‐2020 Antwerp, Belgium, Fax: (+32)‐32‐653‐233; phone: (+32)‐32‐653‐205
| | - Emily A. Mitchell
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B‐2020 Antwerp, Belgium, Fax: (+32)‐32‐653‐233; phone: (+32)‐32‐653‐205
| | - Lieven Meerpoel
- Janssen Research & Development, a division of Janssen Pharmaceutica N.V., Turnhoutseweg 30, B‐2340, Beerse, Belgium
| | - Bert U. W. Maes
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B‐2020 Antwerp, Belgium, Fax: (+32)‐32‐653‐233; phone: (+32)‐32‐653‐205
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141
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Modak A, Dutta U, Kancherla R, Maity S, Bhadra M, Mobin SM, Maiti D. Predictably Selective (sp3)C–O Bond Formation through Copper Catalyzed Dehydrogenative Coupling: Facile Synthesis of Dihydro-oxazinone Derivatives. Org Lett 2014; 16:2602-5. [DOI: 10.1021/ol500670h] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Atanu Modak
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Uttam Dutta
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Rajesh Kancherla
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Soham Maity
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Mohitosh Bhadra
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Shaikh M. Mobin
- Discipline
of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore 452017, India
| | - Debabrata Maiti
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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142
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Zhao J, Fang H, Zhou W, Han J, Pan Y. Iron-Catalyzed Cross-Dehydrogenative Coupling Esterification of Unactive C(sp3)–H Bonds with Carboxylic Acids for the Synthesis of α-Acyloxy Ethers. J Org Chem 2014; 79:3847-55. [DOI: 10.1021/jo500192h] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jincan Zhao
- School of Chemistry
and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Hong Fang
- School of Chemistry
and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Wei Zhou
- School of Chemistry
and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Jianlin Han
- School of Chemistry
and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
- Institute for Chemistry & BioMedical Sciences, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Yi Pan
- School of Chemistry
and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
- Institute for Chemistry & BioMedical Sciences, Nanjing University, Nanjing 210093, People’s Republic of China
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143
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Schinkel M, Wang L, Bielefeld K, Ackermann L. Ruthenium(II)-catalyzed C(sp3)-H α-alkylation of pyrrolidines. Org Lett 2014; 16:1876-9. [PMID: 24635222 DOI: 10.1021/ol500300w] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A catalytic system comprising [RuCl2(PPh3)3], AgOTf, and BINAP enabled atom- and step-economical additions of C(sp(3))-H bonds onto unactivated alkenes 2 under comparably mild reaction conditions. The pyridyl directing group was easily removed to furnish the corresponding (NH)-free amines with ample scope.
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Affiliation(s)
- Marvin Schinkel
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität , Tammannstrasse 2, 37077 Göttingen, Germany
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144
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Affiliation(s)
- Cam-Van T. Vo
- Laboratorium
für Organische
Chemie, ETH Zürich, Vladimir Prelog Weg 1-5, Zürich, Switzerland 8093
| | - Jeffrey W. Bode
- Laboratorium
für Organische
Chemie, ETH Zürich, Vladimir Prelog Weg 1-5, Zürich, Switzerland 8093
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145
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Dörfler J, Doye S. A Commercially Available Tantalum Catalyst for the Highly Regioselective Intermolecular Hydroaminoalkylation of Styrenes. European J Org Chem 2014. [DOI: 10.1002/ejoc.201400082] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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146
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147
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148
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Schmitt DC, Lee J, Dechert-Schmitt AMR, Yamaguchi E, Krische MJ. Ruthenium catalyzed hydroaminoalkylation of isoprene via transfer hydrogenation: byproduct-free prenylation of hydantoins. Chem Commun (Camb) 2013; 49:6096-8. [PMID: 23722271 DOI: 10.1039/c3cc43463j] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ruthenium catalyst derived from Ru3(CO)12 and triphos [Ph2P(CH2CH2PPh2)2] promotes the direct C-C coupling of isoprene with aryl substituted hydantoins 1a–1f at the diene C4-position to furnish products of n-prenylation 2a–2f. A mechanism involving hydantoin dehydrogenation followed by diene-imine oxidative coupling to furnish a transient aza-ruthencyclopentene is proposed.
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Affiliation(s)
- Daniel C Schmitt
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA
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149
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Nickel Complex Catalyzed Efficient Activation of sp3 and sp2 C–H Bonds for Alkylation and Arylation of Oxygen Containing Heterocyclic Molecules. Catal Letters 2013. [DOI: 10.1007/s10562-013-1170-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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150
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Chong E, Schafer LL. 2-Pyridonate titanium complexes for chemoselectivity. Accessing intramolecular hydroaminoalkylation over hydroamination. Org Lett 2013; 15:6002-5. [PMID: 24224611 DOI: 10.1021/ol402890m] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Chemoselectivity of intramolecular hydroaminoalkylation over hydroamination has been achieved with a bis(3-phenyl-2-pyridonate) titanium complex. Primary aminoalkenes are selectively α-alkylated by C-H functionalization adjacent to nitrogen to access five- and six-membered cycloalkylamines with a good substrate-dependent diastereoselectivity of up to 19:1.
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Affiliation(s)
- Eugene Chong
- Department of Chemistry, University of British Columbia , 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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