51
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Liu Z, Chen J, Lu HX, Li X, Gao Y, Coombs JR, Goldfogel MJ, Engle KM. Palladium(0)-Catalyzed Directed syn-1,2-Carboboration and -Silylation: Alkene Scope, Applications in Dearomatization, and Stereocontrol by a Chiral Auxiliary. Angew Chem Int Ed Engl 2019; 58:17068-17073. [PMID: 31538388 PMCID: PMC7337986 DOI: 10.1002/anie.201910304] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Indexed: 11/08/2022]
Abstract
We report the development of palladium(0)-catalyzed syn-selective 1,2-carboboration and -silylation reactions of alkenes containing cleavable directing groups. With B2 pin2 or PhMe2 Si-Bpin as nucleophiles and aryl/alkenyl triflates as electrophiles, a broad range of mono-, di-, tri- and tetrasubstituted alkenes are compatible in these transformations. We further describe a directed dearomative 1,2-carboboration of electron-rich heteroarenes by employing this approach. Through use of a removable chiral directing group, we demonstrate the viability of achieving stereoinduction in Heck-type alkene 1,2-difunctionalization. This work introduces new avenues to access highly functionalized boronates and silanes with precise regio- and stereocontrol.
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Affiliation(s)
- Zhen Liu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037, USA
| | - Jiahao Chen
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037, USA
| | - Hou-Xiang Lu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037, USA
| | - Xiaohan Li
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037, USA
| | - Yang Gao
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037, USA
| | - John R Coombs
- Chemical Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, New Jersey, 08903, USA
| | - Matthew J Goldfogel
- Chemical Development, Bristol-Myers Squibb, One Squibb Drive, New Brunswick, New Jersey, 08903, USA
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California, 92037, USA
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52
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Afewerki S, Córdova A. Enamine/Transition Metal Combined Catalysis: Catalytic Transformations Involving Organometallic Electrophilic Intermediates. Top Curr Chem (Cham) 2019; 377:38. [PMID: 31732819 PMCID: PMC6858407 DOI: 10.1007/s41061-019-0267-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 11/05/2019] [Indexed: 12/15/2022]
Abstract
The concept of merging enamine activation catalysis with transition metal catalysis is an important strategy, which allows for selective chemical transformations not accessible without this combination. The amine catalyst activates the carbonyl compounds through the formation of a reactive nucleophilic enamine intermediate and, in parallel, the transition metal activates a wide range of functionalities such as allylic substrates through the formation of reactive electrophilic π-allyl-metal complex. Since the first report of this strategy in 2006, considerable effort has been devoted to the successful advancement of this technology. In this chapter, these findings are highlighted and discussed.
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Affiliation(s)
- Samson Afewerki
- Department of Natural Sciences, Mid Sweden University, 851 70, Sundsvall, Sweden.
| | - Armando Córdova
- Department of Natural Sciences, Mid Sweden University, 851 70, Sundsvall, Sweden.
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53
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Wang Z, Bai X, Li B. Metal‐Catalyzed Substrate‐Directed Enantioselective Functionalization of Unactivated Alkenes. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900308] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Zi‐Xuan Wang
- Center of Basic Molecular Science (CBMS), Department of ChemistryTsinghua University Beijing 100084 China
| | - Xiao‐Yan Bai
- Center of Basic Molecular Science (CBMS), Department of ChemistryTsinghua University Beijing 100084 China
| | - Bi‐Jie Li
- Center of Basic Molecular Science (CBMS), Department of ChemistryTsinghua University Beijing 100084 China
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54
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Huang D, Olivieri D, Sun Y, Zhang P, Newhouse TR. Nickel-Catalyzed Difunctionalization of Unactivated Alkenes Initiated by Unstabilized Enolates. J Am Chem Soc 2019; 141:16249-16254. [DOI: 10.1021/jacs.9b09245] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- David Huang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Diego Olivieri
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Yang Sun
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Pengpeng Zhang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R. Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
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55
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Wei C, Ye X, Xing Q, Hu Y, Xie Y, Shi X. Synergistic palladium/enamine catalysis for asymmetric hydrocarbon functionalization of unactivated alkenes with ketones. Org Biomol Chem 2019; 17:6607-6611. [PMID: 31237304 PMCID: PMC6677245 DOI: 10.1039/c9ob01165j] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synergistic palladium and enamine catalysis was explored to promote ketone addition to unactivated olefins. A secondary amine-based organocatalyst was identified as the optimal co-catalyst for the directed Pd-catalyzed alkene activation. Furthermore, asymmetric hydrocarbon functionalization of unactivated alkenes was also achieved with good to excellent yield (up to 96% yields) and stereoselectivity (up to 96% ee). This strategy presented an efficient approach to prepare α-branched ketone derivatives under mild conditions.
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Affiliation(s)
- Chiyu Wei
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA.
| | - Xiaohan Ye
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA.
| | - Qingyu Xing
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA.
| | - Yong Hu
- Department of Neonatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, Shanghai 200040, P.R.China.
| | - Yan Xie
- College of Chemistry and Materials Engineering, Quzhou University, Quzhou 324000, P.R.China.
| | - Xiaodong Shi
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA.
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56
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Bai Z, Zheng S, Bai Z, Song F, Wang H, Peng Q, Chen G, He G. Palladium-Catalyzed Amide-Directed Enantioselective Carboboration of Unactivated Alkenes Using a Chiral Monodentate Oxazoline Ligand. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01350] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Zibo Bai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Sujuan Zheng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Ziqian Bai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Fangfang Song
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Hao Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Qian Peng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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57
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Schreib BS, Carreira EM. Palladium-Catalyzed Regioselective C–H Iodination of Unactivated Alkenes. J Am Chem Soc 2019; 141:8758-8763. [DOI: 10.1021/jacs.9b03998] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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58
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Liu Z, Li X, Zeng T, Engle KM. Directed, Palladium(II)-Catalyzed Enantioselective anti-Carboboration of Alkenyl Carbonyl Compounds. ACS Catal 2019; 9:3260-3265. [PMID: 31799023 DOI: 10.1021/acscatal.9b00181] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A substrate-directed enantioselective anti-carboboration reaction of alkenes has been developed, wherein a carbon-based nucleophile and a boron moiety are installed across the C=C bond through a 5-membered palladacycle intermediate. A preliminary result also shows it is possible to extend this reaction to alkenes that are more distal from the directing group and react via a 6-membered palladacycle. The reaction is promoted by a palladium(II) catalyst and a monodentate oxazoline ligand. A range of enantioenriched secondary alkylboronate products were obtained with moderate to high enantioselectivity that could be further upgraded by recrystallization. This work represents an efficient method to synthesize versatile and valuable alkylboronate building blocks. Building on an earlier mechanistic proposal by Peng, He, and Chen, a revised model is proposed to account for the stereoconvergent nature of this transformation.
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Affiliation(s)
- Zhen Liu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Xiaohan Li
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Tian Zeng
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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59
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Nimmagadda SK, Liu M, Karunananda MK, Gao DW, Apolinar O, Chen JS, Liu P, Engle KM. Catalytic, Enantioselective α-Alkylation of Azlactones with Nonconjugated Alkenes by Directed Nucleopalladation. Angew Chem Int Ed Engl 2019; 58:3923-3927. [PMID: 30729619 PMCID: PMC6595491 DOI: 10.1002/anie.201814272] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Indexed: 01/03/2023]
Abstract
A palladium(II)-catalyzed enantioselective α-alkylation of azlactones with nonconjugated alkenes is described. The reaction employs a chiral BINOL-derived phosphoric acid as the source of stereoinduction, and a cleavable bidentate directing group appended to the alkene to control the regioselectivity and stabilize the nucleopalladated alkylpalladium(II) intermediate in the catalytic cycle. A wide range of azlactones were found to be compatible under the optimal reaction conditions to afford products bearing α,α-disubstituted α-amino-acid derivatives with high yields and high enantioselectivity.
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Affiliation(s)
- Sri Krishna Nimmagadda
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, BCC-169, La Jolla, CA, 92037, USA
| | - Mingyu Liu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, BCC-169, La Jolla, CA, 92037, USA
| | - Malkanthi K Karunananda
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, BCC-169, La Jolla, CA, 92037, USA
| | - De-Wei Gao
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, BCC-169, La Jolla, CA, 92037, USA
| | - Omar Apolinar
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, BCC-169, La Jolla, CA, 92037, USA
| | - Jason S Chen
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, BCC-169, La Jolla, CA, 92037, USA
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA, 15260, USA
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, BCC-169, La Jolla, CA, 92037, USA
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60
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Nimmagadda SK, Liu M, Karunananda MK, Gao D, Apolinar O, Chen JS, Liu P, Engle KM. Catalytic, Enantioselective α‐Alkylation of Azlactones with Nonconjugated Alkenes by Directed Nucleopalladation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814272] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Sri Krishna Nimmagadda
- Department of ChemistryThe Scripps Research Institute 10550 N. Torrey Pines Road, BCC-169 La Jolla CA 92037 USA
| | - Mingyu Liu
- Department of ChemistryThe Scripps Research Institute 10550 N. Torrey Pines Road, BCC-169 La Jolla CA 92037 USA
| | - Malkanthi K. Karunananda
- Department of ChemistryThe Scripps Research Institute 10550 N. Torrey Pines Road, BCC-169 La Jolla CA 92037 USA
| | - De‐Wei Gao
- Department of ChemistryThe Scripps Research Institute 10550 N. Torrey Pines Road, BCC-169 La Jolla CA 92037 USA
| | - Omar Apolinar
- Department of ChemistryThe Scripps Research Institute 10550 N. Torrey Pines Road, BCC-169 La Jolla CA 92037 USA
| | - Jason S. Chen
- Department of ChemistryThe Scripps Research Institute 10550 N. Torrey Pines Road, BCC-169 La Jolla CA 92037 USA
| | - Peng Liu
- Department of ChemistryUniversity of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Keary M. Engle
- Department of ChemistryThe Scripps Research Institute 10550 N. Torrey Pines Road, BCC-169 La Jolla CA 92037 USA
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