1
|
Pozhydaiev V, Muller C, Moran J, Lebœuf D. Catalytic Synthesis of β-(Hetero)arylethylamines: Modern Strategies and Advances. Angew Chem Int Ed Engl 2023; 62:e202309289. [PMID: 37599269 DOI: 10.1002/anie.202309289] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/18/2023] [Accepted: 08/19/2023] [Indexed: 08/22/2023]
Abstract
β-(Hetero)arylethylamines appear in a myriad of pharmaceuticals due to their broad spectrum of biological properties, making them prime candidates for drug discovery. Conventional methods for their preparation often require engineered substrates that limit the flexibility of the synthetic routes and the diversity of compounds that can be accessed. Consequently, methods that provide rapid and versatile access to those scaffolds remain limited. To overcome these challenges, synthetic chemists have designed innovative and modular strategies to access the β-(hetero)arylethylamine motif, paving the way for their more extensive use in future pharmaceuticals. This review outlines recent progresses in the synthesis of (hetero)arylethylamines and emphasizes how these innovations have enabled new levels of molecular complexity, selectivity, and practicality.
Collapse
Affiliation(s)
- Valentyn Pozhydaiev
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg, 8 Allée Gaspard Monge, 67000, Strasbourg, France
| | - Cyprien Muller
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg, 8 Allée Gaspard Monge, 67000, Strasbourg, France
| | - Joseph Moran
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg, 8 Allée Gaspard Monge, 67000, Strasbourg, France
- Institut Universitaire de France (IUF), 75005, Paris, France
| | - David Lebœuf
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg, 8 Allée Gaspard Monge, 67000, Strasbourg, France
| |
Collapse
|
2
|
Chen XX, Luo H, Chen YW, Liu Y, He ZT. Enantioselective Palladium-Catalyzed Directed Migratory Allylation of Remote Dienes. Angew Chem Int Ed Engl 2023; 62:e202307628. [PMID: 37387558 DOI: 10.1002/anie.202307628] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/30/2023] [Accepted: 06/30/2023] [Indexed: 07/01/2023]
Abstract
Chain walking has been an efficient route to realize the functionalization of inert C(sp3 )-H bonds, but this strategy is limited to mono-olefin migration and functionalization. Herein, we demonstrate the feasibility of tandem directed simultaneous migrations of remote olefins and stereoselective allylation for the first time. The adoption of palladium hydride catalysis and secondary amine morpholine as solvent is critical for achieving high substrate compatibility and stereochemical control with this method. The protocol is also applicable to the functionalization of three vicinal C(sp3 )-H bonds and thus construct three continuous stereocenters along a propylidene moiety via a short synthetic process. Preliminary mechanistic experiments corroborated the design of simultaneous walking of remote dienes.
Collapse
Affiliation(s)
- Xian-Xiao Chen
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
| | - Hao Luo
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
| | - Ye-Wei Chen
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
| | - Yang Liu
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
| | - Zhi-Tao He
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
| |
Collapse
|
3
|
Xu B, Su W. A Tandem Dehydrogenation-Driven Cross-Coupling between Cyclohexanones and Primary Amines for Construction of Benzoxazoles. Angew Chem Int Ed Engl 2022; 61:e202203365. [PMID: 35546303 DOI: 10.1002/anie.202203365] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Indexed: 01/27/2023]
Abstract
Herein, we report a transition metal-free, operationally simple, general method for straightforward syntheses of 2-substituted benzoxazoles from readily available cyclohexanones and aliphatic primary amines by an imine α-oxygenation-initiated cascade reaction sequence. The key to achieving high selectivity and excellent functional-group tolerance is the use of TEMPO as a mild oxidant that selectively oxidizes the reaction intermediates through its multiple reactivity modes, thus facilitating the individual steps to proceed in succession. More than 70 substrate combinations are disclosed, demonstrating the reliability of this protocol to synthesize structurally diverse products, including marketed drugs, drug candidate, and natural products that are unattainable by the existing methods.
Collapse
Affiliation(s)
- Biping Xu
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, 350002, China
| | - Weiping Su
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, 350002, China
| |
Collapse
|
4
|
Kaźmierczak M, Dutkiewicz G, Koroniak H. Deoxyfluorinating reagents as tools for γ-amino-α-hydroxyphosphonate modification. Org Biomol Chem 2022; 20:5615-5623. [PMID: 35796647 DOI: 10.1039/d2ob00915c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Herein, we would like to present deoxyfluorinating reagents such as DAST and PyFluor and their successful use as tools for selective modification of γ-amino-α-hydroxyphosphonates. Depending on the deoxyfluorinating reagent applied, an intramolecular cyclization leading to phosphonates containing the 1,3-oxazinan-2-one moiety or direct nucleophilic deoxyfluorination yielding the α-fluorinated derivatives of γ-aminophosphonates was observed. The obtained compounds may be used as precursors in the preparation of medicinally important compounds e.g., dipeptide analogues or scaffolds containing the 1,3-oxazinan-2-one group.
Collapse
Affiliation(s)
- Marcin Kaźmierczak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland. .,Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Grzegorz Dutkiewicz
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.
| | - Henryk Koroniak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.
| |
Collapse
|
5
|
Xu B, Su W. A Tandem Dehydrogenation‐Driven Cross‐Coupling between Cyclohexanones and Primary Amines for Construction of Benzoxazoles. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Biping Xu
- FIRSM: Chinese Academy of Sciences Fujian Institute of Research on the Structure of Matter Chemistry CHINA
| | - Weiping Su
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences State Key Laboratory of Structural Chemistry Yangqiao West Road 155# 350002 Fuzhou CHINA
| |
Collapse
|
6
|
Ding C, Ren Y, Sun C, Long J, Yin G. Regio- and Stereoselective Alkylboration of Endocyclic Olefins Enabled by Nickel Catalysis. J Am Chem Soc 2021; 143:20027-20034. [PMID: 34734714 DOI: 10.1021/jacs.1c09214] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Whereas there is a significant interest in the rapid construction of diversely substituted saturated heterocycles, direct and modular access is currently limited to the mono-, 2,3-, or 3,4-substitution pattern. This Communication describes the straightforward and modular construction of 2,4-substituted saturated heterocycles from readily available materials in a highly stereo- and regioselective manner, which sets the stage for numerous readily accessible drug motifs. The strategy relies on chain walking catalysis.
Collapse
Affiliation(s)
- Chao Ding
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Yaoyu Ren
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Caocao Sun
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Jiao Long
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Guoyin Yin
- The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, P. R. China
| |
Collapse
|
7
|
Wasa M, Yesilcimen A. Enantioselective Cooperative Catalysis within Frustrated Lewis Pair Complexes. J SYN ORG CHEM JPN 2021. [DOI: 10.5059/yukigoseikyokaishi.79.1065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Masayuki Wasa
- Department of Chemistry, Merkert Chemistry Center, Boston College
| | | |
Collapse
|
8
|
Hu R, Tao Y, Zhang X, Su W. 1,2‐Aryl Migration Induced by Amide C−N Bond‐Formation: Reaction of Alkyl Aryl Ketones with Primary Amines Towards α,α‐Diaryl β,γ‐Unsaturated γ‐Lactams. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014900] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rong Hu
- State Key Laboratory of Structural Chemistry Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Yangqiao West Road 155 Fuzhou Fujian 350002 China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- School of Physical Science and Technology ShanghaiTech University 100 Haike Road Shanghai 201210 China
- Shanghai Advanced Research Institute Chinese Academy of Sciences China
| | - Yigao Tao
- State Key Laboratory of Structural Chemistry Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Yangqiao West Road 155 Fuzhou Fujian 350002 China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- School of Physical Science and Technology ShanghaiTech University 100 Haike Road Shanghai 201210 China
- Shanghai Advanced Research Institute Chinese Academy of Sciences China
| | - Xiaofeng Zhang
- State Key Laboratory of Structural Chemistry Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Yangqiao West Road 155 Fuzhou Fujian 350002 China
| | - Weiping Su
- State Key Laboratory of Structural Chemistry Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Yangqiao West Road 155 Fuzhou Fujian 350002 China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- School of Physical Science and Technology ShanghaiTech University 100 Haike Road Shanghai 201210 China
| |
Collapse
|
9
|
Hu R, Tao Y, Zhang X, Su W. 1,2-Aryl Migration Induced by Amide C-N Bond-Formation: Reaction of Alkyl Aryl Ketones with Primary Amines Towards α,α-Diaryl β,γ-Unsaturated γ-Lactams. Angew Chem Int Ed Engl 2021; 60:8425-8430. [PMID: 33432640 DOI: 10.1002/anie.202014900] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/18/2020] [Indexed: 12/15/2022]
Abstract
Rearrangement reactions incorporated into cascade reactions play an important role in rapidly increasing molecular complexity from readily available starting materials. Reported here is a Cu-catalyzed cascade reaction of α-(hetero)aryl-substituted alkyl (hetero)aryl ketones with primary amines that incorporates an unusual 1,2-aryl migration induced by amide C-N bond formation to produce a class of structurally novel α,α-diaryl β,γ-unsaturated γ-lactams in generally good-to-excellent yields. This cascade reaction has a broad substrate scope with respect to primary amines, allows a wide spectrum of (hetero)aryl groups to smoothly undergo 1,2-migration, and tolerates electronically diverse α-substituents on the (hetero)aryl ring of the ketones. Mechanistically, this 1,2-aryl migration may stem from the intramolecular amide C-N bond formation which induces nucleophilic migration of the aryl group from the acyl carbon center to the electrophilic carbon center that is conjugated with the resulting iminium moiety.
Collapse
Affiliation(s)
- Rong Hu
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Yangqiao West Road 155, Fuzhou, Fujian, 350002, China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.,School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai, 201210, China.,Shanghai Advanced Research Institute, Chinese Academy of Sciences, China
| | - Yigao Tao
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Yangqiao West Road 155, Fuzhou, Fujian, 350002, China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.,School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai, 201210, China.,Shanghai Advanced Research Institute, Chinese Academy of Sciences, China
| | - Xiaofeng Zhang
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Yangqiao West Road 155, Fuzhou, Fujian, 350002, China
| | - Weiping Su
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Yangqiao West Road 155, Fuzhou, Fujian, 350002, China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.,School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai, 201210, China
| |
Collapse
|
10
|
Holmberg-Douglas N, Choi Y, Aquila B, Huynh H, Nicewicz DA. β-Functionalization of Saturated Aza-Heterocycles Enabled by Organic Photoredox Catalysis. ACS Catal 2021; 11:3153-3158. [DOI: 10.1021/acscatal.1c00099] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Natalie Holmberg-Douglas
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Younggi Choi
- Alkermes, Inc, 852 Winter Street, Waltham, Massachusetts 02451-1420, United States
| | - Brian Aquila
- Alkermes, Inc, 852 Winter Street, Waltham, Massachusetts 02451-1420, United States
| | - Hoan Huynh
- Alkermes, Inc, 852 Winter Street, Waltham, Massachusetts 02451-1420, United States
| | - David A. Nicewicz
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| |
Collapse
|
11
|
Chang Y, Cao M, Chan JZ, Zhao C, Wang Y, Yang R, Wasa M. Enantioselective Synthesis of N-Alkylamines through β-Amino C-H Functionalization Promoted by Cooperative Actions of B(C 6F 5) 3 and a Chiral Lewis Acid Co-Catalyst. J Am Chem Soc 2021; 143:2441-2455. [PMID: 33512998 DOI: 10.1021/jacs.0c13200] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We disclose a catalytic method for β-C(sp3)-H functionalization of N-alkylamines for the synthesis of enantiomerically enriched β-substituted amines, entities prevalent in pharmaceutical compounds and used to generate different families of chiral catalysts. We demonstrate that a catalyst system comprising of seemingly competitive Lewis acids, B(C6F5)3, and a chiral Mg- or Sc-based complex, promotes the highly enantioselective union of N-alkylamines and α,β-unsaturated compounds. An array of δ-amino carbonyl compounds was synthesized under redox-neutral conditions by enantioselective reaction of a N-alkylamine-derived enamine and an electrophile activated by the chiral Lewis acid co-catalyst. The utility of the approach is highlighted by late-stage β-C-H functionalization of bioactive amines. Investigations in regard to the mechanistic nuances of the catalytic processes are described.
Collapse
Affiliation(s)
- Yejin Chang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Min Cao
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Jessica Z Chan
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Cunyuan Zhao
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Yuankai Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Rose Yang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Masayuki Wasa
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| |
Collapse
|
12
|
Xu LP, Roque JB, Sarpong R, Musaev DG. Reactivity and Selectivity Controlling Factors in the Pd/Dialkylbiarylphosphine-Catalyzed C–C Cleavage/Cross-Coupling of an N-Fused Bicyclo α-Hydroxy-β-Lactam. J Am Chem Soc 2020; 142:21140-21152. [DOI: 10.1021/jacs.0c10220] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Li-Ping Xu
- Cherry L. Emerson Center for Scientific Computation, and Department of Chemistry, Emory University, 1521 Dickey Drive, Atlanta, Georgia 30322, United States
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255000, China
| | - Jose B. Roque
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Djamaladdin G. Musaev
- Cherry L. Emerson Center for Scientific Computation, and Department of Chemistry, Emory University, 1521 Dickey Drive, Atlanta, Georgia 30322, United States
| |
Collapse
|
13
|
Baumgartner Y, Baudoin O. One-Pot Alkene Hydroboration/Palladium-Catalyzed Migratory Suzuki–Miyaura Cross-Coupling. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02755] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yann Baumgartner
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
| | - Olivier Baudoin
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
| |
Collapse
|
14
|
Shaughnessy KH. Monodentate Trialkylphosphines: Privileged Ligands in Metal-catalyzed Crosscoupling Reactions. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824666200211114540] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Phosphines are widely used ligands in transition metal-catalyzed reactions.
Arylphosphines, such as triphenylphosphine, were among the first phosphines to show
broad utility in catalysis. Beginning in the late 1990s, sterically demanding and electronrich
trialkylphosphines began to receive attention as supporting ligands. These ligands
were found to be particularly effective at promoting oxidative addition in cross-coupling
of aryl halides. With electron-rich, sterically demanding ligands, such as tri-tertbutylphosphine,
coupling of aryl bromides could be achieved at room temperature. More
importantly, the less reactive, but more broadly available, aryl chlorides became accessible
substrates. Tri-tert-butylphosphine has become a privileged ligand that has found application
in a wide range of late transition-metal catalyzed coupling reactions. This success
has led to the use of numerous monodentate trialkylphosphines in cross-coupling reactions. This review
will discuss the general properties and features of monodentate trialkylphosphines and their application in
cross-coupling reactions of C–X and C–H bonds.
Collapse
Affiliation(s)
- Kevin H. Shaughnessy
- Department of Chemistry & Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, AL, 35487-0336, United States
| |
Collapse
|
15
|
Lin W, Zhang KF, Baudoin O. Regiodivergent enantioselective C-H functionalization of Boc-1,3-oxazinanes and application to the synthesis of β 2 and β 3-amino acids. Nat Catal 2019; 2:882-888. [PMID: 31620675 PMCID: PMC6795538 DOI: 10.1038/s41929-019-0336-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
β2- and β3-Amino acids are important
chiral building blocks for the design of new pharmaceuticals and
peptidomimetics. Here we report a straightforward regio- and enantiodivergent
access to these compounds using a one-pot reaction composed of
sparteine-mediated enantioselective lithiation of a Boc-1,3-oxazinane,
transmetallation to zinc and direct or migratory Negishi coupling with an
organic electrophile. The regioselectivity of the Negishi coupling was highly
ligand-controlled and switchable to obtain the C4- or the C5-functionalized
product exclusively. High enantioselectivities were achieved on a broad range of
examples, and a catalytic version in chiral diamine was developed using the
(+)-sparteine surrogate. Selected C4- and C5-functionalized Boc-1,3-oxazinanes
were subsequently converted to highly enantio-enriched β2- and
β3-amino acids with the (R) or
(S) configuration, depending on the sparteine enantiomer
employed in the lithiation step.
Collapse
Affiliation(s)
- Weilong Lin
- University of Basel, Department of Chemistry, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
| | - Ke-Feng Zhang
- University of Basel, Department of Chemistry, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
| | - Olivier Baudoin
- University of Basel, Department of Chemistry, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
| |
Collapse
|
16
|
Royal T, Baudoin O. Pd-catalyzed γ-arylation of γ,δ-unsaturated O-carbamates via an unusual haptotropic rearrangement. Chem Sci 2019; 10:2331-2335. [PMID: 30881660 PMCID: PMC6385668 DOI: 10.1039/c8sc05058a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 12/21/2018] [Indexed: 11/21/2022] Open
Abstract
An unusual γ-selectivity was observed in the arylation of γ,δ-unsaturated O-carbamates involving directed lithiation, transmetallation to zinc and Negishi coupling, when a specific combination of aryl electrophile and phosphine ligand is employed. Mechanistic studies indicate that an unusual, stereospecific haptotropic rearrangement of the palladium-diene intermediate is involved.
Collapse
Affiliation(s)
- Titouan Royal
- University of Basel , Department of Chemistry , St. Johanns-Ring 19 , CH-4056 Basel , Switzerland .
| | - Olivier Baudoin
- University of Basel , Department of Chemistry , St. Johanns-Ring 19 , CH-4056 Basel , Switzerland .
| |
Collapse
|
17
|
Zhang L, Xiang SH, Wang JJ, Xiao J, Wang JQ, Tan B. Phosphoric acid-catalyzed atroposelective construction of axially chiral arylpyrroles. Nat Commun 2019; 10:566. [PMID: 30718716 PMCID: PMC6361918 DOI: 10.1038/s41467-019-08447-z] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 01/07/2019] [Indexed: 01/04/2023] Open
Abstract
Axially chiral arylpyrroles are key components of pharmaceuticals and natural products as well as chiral catalysts and ligands for asymmetric transformations. However, the catalytic enantioselective construction of optically active arylpyrroles remains a formidable challenge. Here we disclose a highly efficient strategy to access enantioenriched axially chiral arylpyrroles by means of organocatalytic atroposelective desymmetrization and kinetic resolution. Depending on the remote control of chiral catalyst, the arylpyrroles were obtained in high yields and excellent enantioselectivities under mild reaction conditions. This strategy tolerates a wide range of functional groups, providing a facile avenue to approach axially chiral arylpyrroles from simple and readily available starting materials. Selected arylpyrrole products proved to be efficient chiral ligands in asymmetric catalysis and also important precursors for further synthetic transformations into highly functionalized pyrroles with potential bioactivity, especially the axially chiral fully substituted arylpyrroles. Axially chiral arylpyrroles are structural motifs often found in natural and medicinal products. Here, the authors report the atroposelective synthesis of axially chiral arylpyrrole derivatives, which proved to be efficient chiral ligands for asymmetric catalysis, through desymmetrization and kinetic resolution.
Collapse
Affiliation(s)
- Lei Zhang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Shao-Hua Xiang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China.,Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jun Joelle Wang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China.
| | - Jian Xiao
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Jun-Qi Wang
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Bin Tan
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China.
| |
Collapse
|
18
|
Rong MK, Holtrop F, Slootweg JC, Lammertsma K. 1,3-P,N hybrid ligands in mononuclear coordination chemistry and homogeneous catalysis. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.08.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
19
|
Dong J, Xia Q, Lv X, Yan C, Song H, Liu Y, Wang Q. Photoredox-Mediated Direct Cross-Dehydrogenative Coupling of Heteroarenes and Amines. Org Lett 2018; 20:5661-5665. [DOI: 10.1021/acs.orglett.8b02389] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jianyang Dong
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Qing Xia
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Xueli Lv
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Changcun Yan
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, People’s Republic of China
| |
Collapse
|
20
|
Ho G, Judkele L, Bruffaerts J, Marek I. Metal‐Catalyzed Remote Functionalization of ω‐Ene Unsaturated Ethers: Towards Functionalized Vinyl Species. Angew Chem Int Ed Engl 2018; 57:8012-8016. [DOI: 10.1002/anie.201802434] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 04/23/2018] [Indexed: 01/10/2023]
Affiliation(s)
- Guo‐Ming Ho
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology Haifa 32000 Israel
| | - Lina Judkele
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology Haifa 32000 Israel
| | - Jeffrey Bruffaerts
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology Haifa 32000 Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology Haifa 32000 Israel
| |
Collapse
|
21
|
Ho G, Judkele L, Bruffaerts J, Marek I. Metal‐Catalyzed Remote Functionalization of ω‐Ene Unsaturated Ethers: Towards Functionalized Vinyl Species. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802434] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Guo‐Ming Ho
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology Haifa 32000 Israel
| | - Lina Judkele
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology Haifa 32000 Israel
| | - Jeffrey Bruffaerts
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology Haifa 32000 Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology Haifa 32000 Israel
| |
Collapse
|
22
|
Singh S, Simaan M, Marek I. Pd-Catalyzed Selective Remote Ring Opening of Polysubstituted Cyclopropanols. Chemistry 2018; 24:8553-8557. [PMID: 29694690 DOI: 10.1002/chem.201802016] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Indexed: 12/14/2022]
Abstract
The distant functionalization of ω-ene cyclopropanols is induced by a Pd-catalyzed Heck reaction triggering a "metal-walk" and selective ring-opening of the three-membered ring. This approach provides a new class of acyclic aldehydes possessing concomitantly a stereodefined double bond and a quaternary carbon stereocenter α to the carbonyl group.
Collapse
Affiliation(s)
- Sukhdev Singh
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200009, Israel
| | - Marwan Simaan
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200009, Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200009, Israel
| |
Collapse
|
23
|
Zhang XM, Yang J, Zhuang QB, Tu YQ, Chen Z, Shao H, Wang SH, Zhang FM. Allylic Arylation of 1,3-Dienes via Hydroboration/Migrative Suzuki–Miyaura Cross-Coupling Reactions. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01823] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jie Yang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Qing-Bo Zhuang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Zongyuan Chen
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, P. R. China
| | - Hui Shao
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Shao-Hua Wang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
- School of Pharmacy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| |
Collapse
|
24
|
Alkene-Zipper Catalyzed Selective and Remote Retro-ene Reaction of Alkenyl Cyclopropylcarbinol. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701481] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
25
|
Zhang KF, Christoffel F, Baudoin O. Barbier-Negishi Coupling of Secondary Alkyl Bromides with Aryl and Alkenyl Triflates and Nonaflates. Angew Chem Int Ed Engl 2018; 57:1982-1986. [PMID: 29316142 DOI: 10.1002/anie.201711990] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Indexed: 12/14/2022]
Abstract
A mild and practical Barbier-Negishi coupling of secondary alkyl bromides with aryl and alkenyl triflates and nonaflates has been developed. This challenging reaction was enabled by the use of a very bulky imidazole-based phosphine ligand, which resulted in good yields as well as good chemo- and site selectivities for a broad range of substrates at room temperature and under non-aqueous conditions. This reaction was extended to primary alkyl bromides by using an analogous pyrazole-based ligand.
Collapse
Affiliation(s)
- Ke-Feng Zhang
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Fadri Christoffel
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Olivier Baudoin
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| |
Collapse
|
26
|
Zhang KF, Christoffel F, Baudoin O. Barbier-Negishi Coupling of Secondary Alkyl Bromides with Aryl and Alkenyl Triflates and Nonaflates. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711990] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ke-Feng Zhang
- Department of Chemistry; University of Basel; St. Johanns-Ring 19 4056 Basel Switzerland
| | - Fadri Christoffel
- Department of Chemistry; University of Basel; St. Johanns-Ring 19 4056 Basel Switzerland
| | - Olivier Baudoin
- Department of Chemistry; University of Basel; St. Johanns-Ring 19 4056 Basel Switzerland
| |
Collapse
|
27
|
Guan J, Zhou ZQ, Chen MH, Li HY, Tong DN, Yang J, Yao J, Zhang ZY. Folate-conjugated and pH-responsive polymeric micelles for target-cell-specific anticancer drug delivery. Acta Biomater 2017; 60:244-255. [PMID: 28713015 DOI: 10.1016/j.actbio.2017.07.018] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 07/03/2017] [Accepted: 07/12/2017] [Indexed: 12/20/2022]
Abstract
In this study, we developed a folate (FA)-conjugated and pH-responsive active targeting micellar system for anti-cancer drug delivery. In this system, FA was attached to the terminal of the hydrophilic segment of poly(lactic acid)-poly(L-lysine) (PLA-PLL), and PLL was modified by a citric acid group. The FA receptor-mediated active targeting and electrostatic interaction between micelles and cell membrane due to a negative-to-positive charge reversal was combined in one micellar anti-cancer drug delivery system to enhance the tumour targeting and cellular internalisation of micelles. In vitro and in vivo anti-cancer studies demonstrated that the doxorubicin-loaded, FA-conjugated and pH-responsive polymeric micelles possess an enhanced and effective cancer efficiency. STATEMENT OF SIGNIFICANCE Negatively charged nano-carriers prolonged anti-cancer drugs' blood circulation. However it is difficult to be internalised. Therefore, a negative-to-positive charged micelle surface could improve selectivity for tumour cells and increase uptake chance. In this study, we developed a folate (FA)-conjugated and pH-responsive active targeting micellar system for anti-cancer drug delivery. The FA receptor-mediated active targeting and electrostatic interaction between micelles and cell membrane due to a negative-to-positive charge reversal was combined in one micellar anti-cancer drug delivery system to enhance the tumour targeting and cellular internalisation of micelles. In vitro and in vivo anti-cancer studies demonstrated that the doxorubicin-loaded, FA-conjugated and pH-responsive polymeric micelles possess an enhanced and effective cancer efficiency.
Collapse
|
28
|
Probst N, Grelier G, Ghermani N, Gandon V, Alami M, Messaoudi S. Intramolecular Pd-Catalyzed Anomeric C(sp3)–H Activation of Glycosyl Carboxamides. Org Lett 2017; 19:5038-5041. [DOI: 10.1021/acs.orglett.7b02170] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nicolas Probst
- BioCIS, Univ Paris-Sud, CNRS, University Paris-Saclay, Châtenay-Malabry, France
| | - Gwendal Grelier
- Institut
de Chimie des Substances Naturelles, CNRS UPR 2301, Univ Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France
| | - NourEddine Ghermani
- Institut
Galien, Univ-Sud, CNRS, University Paris-Saclay, Châtenay-Malabry 92296, France
| | - Vincent Gandon
- Institut
de Chimie des Substances Naturelles, CNRS UPR 2301, Univ Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France
- Institut
de Chimie Moléculaire et des Matériaux d’Orsay, CNRS UMR 8182, Univ Paris-Sud, Université Paris-Saclay, 91405 Orsay, France
| | - Mouâd Alami
- BioCIS, Univ Paris-Sud, CNRS, University Paris-Saclay, Châtenay-Malabry, France
| | - Samir Messaoudi
- BioCIS, Univ Paris-Sud, CNRS, University Paris-Saclay, Châtenay-Malabry, France
| |
Collapse
|
29
|
Dewyer AL, Zimmerman PM. Simulated Mechanism for Palladium-Catalyzed, Directed γ-Arylation of Piperidine. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01390] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Amanda L. Dewyer
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Paul M. Zimmerman
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| |
Collapse
|
30
|
Firth JD, O'Brien P, Ferris L. General Procedures for the Lithiation/Trapping of N-Boc Piperazines. J Org Chem 2017; 82:7023-7031. [PMID: 28574711 DOI: 10.1021/acs.joc.7b00913] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To provide α-substituted piperazines for early stage medicinal chemistry studies, a simple, general synthetic approach is required. Here, we report the development of two general and simple procedures for the racemic lithiation/trapping of N-Boc piperazines. Optimum lithiation times were determined using in situ IR spectroscopy, and the previous complicated and diverse literature procedures were simplified. Subsequent trapping with electrophiles delivered a wide range of α-functionalized N-Boc piperazines. The scope and limitations of the distal N-group were investigated. The selective α- and β- arylation of N-Boc piperazines via lithiation/Negishi coupling is reported.
Collapse
Affiliation(s)
- James D Firth
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
| | - Peter O'Brien
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
| | - Leigh Ferris
- AstraZeneca U.K. , Macclesfield, Cheshire SK10 2NA, U.K
| |
Collapse
|
31
|
Huang Z, Dong G. Site-Selectivity Control in Organic Reactions: A Quest To Differentiate Reactivity among the Same Kind of Functional Groups. Acc Chem Res 2017; 50:465-471. [PMID: 28945402 DOI: 10.1021/acs.accounts.6b00476] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
On our path to the perfection of organic synthesis lies the challenge of controlling site selectivity, which is the differentiation of reactivity among the same kind of functional groups. Overcoming this challenge would significantly enhance synthetic efficiency and minimize waste production, which in turn calls for the development of new catalysts, reagents, tactics, and innovative strategies.
Collapse
Affiliation(s)
- Zhongxing Huang
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| |
Collapse
|
32
|
Gulia N, Daugulis O. Palladium-Catalyzed Pyrazole-Directed sp 3 C-H Bond Arylation for the Synthesis of β-Phenethylamines. Angew Chem Int Ed Engl 2017; 56:3630-3634. [PMID: 28233918 DOI: 10.1002/anie.201611407] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 12/21/2016] [Indexed: 12/20/2022]
Abstract
We have developed a method for palladium-catalyzed, pyrazole-directed sp3 C-H bond arylation by aryl iodides. The reaction employs a Pd(OAc)2 catalyst at 5-10 mol % loading and silver(I) oxide as a halide-removal agent, and it proceeds in acetic acid or acetic acid/hexafluoroisopropanol solvent. Ozonolysis of the pyrazole moiety affords pharmaceutically important β-phenethylamines.
Collapse
Affiliation(s)
- Nurbey Gulia
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA.,Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383, Wrocław, Poland
| | - Olafs Daugulis
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA
| |
Collapse
|
33
|
Gulia N, Daugulis O. Palladium‐Catalyzed Pyrazole‐Directed sp
3
C−H Bond Arylation for the Synthesis of β‐Phenethylamines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611407] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Nurbey Gulia
- Department of Chemistry University of Houston Houston TX 77204-5003 USA
- Department of Chemistry University of Wrocław 14 F. Joliot-Curie 50-383 Wrocław Poland
| | - Olafs Daugulis
- Department of Chemistry University of Houston Houston TX 77204-5003 USA
| |
Collapse
|
34
|
Royal T, Baumgartner Y, Baudoin O. Enantioselective α-Arylation of O-Carbamates via Sparteine-Mediated Lithiation and Negishi Cross-Coupling. Org Lett 2017; 19:166-169. [PMID: 27995794 DOI: 10.1021/acs.orglett.6b03472] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A general and highly enantioselective arylation of carbamates derived from primary alcohols was developed by combining Hoppe's sparteine-mediated asymmetric lithiation with Negishi cross-coupling. Coupled with Aggarwal's lithiation-borylation sequence, the current method provides a short and divergent access to a variety of enantioenriched secondary and tertiary benzylic alcohols.
Collapse
Affiliation(s)
- Titouan Royal
- University of Basel , Department of Chemistry, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
| | - Yann Baumgartner
- University of Basel , Department of Chemistry, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
| | - Olivier Baudoin
- University of Basel , Department of Chemistry, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
| |
Collapse
|
35
|
Tabasso S, Calcio Gaudino E, Rinaldi L, Ledoux A, Larini P, Cravotto G. Microwave-assisted, ligand-free, direct C–H arylation of thiophenes in biomass-derived γ-valerolactone. NEW J CHEM 2017. [DOI: 10.1039/c7nj01540b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We report a ligand-free green synthesis of arylthiophenes and poly(3-hexyl)thiophene in GVL under microwave irradiation.
Collapse
Affiliation(s)
- Silvia Tabasso
- Dipartimento di Chimica
- University of Turin
- Via P. Giuria 7
- 10125 Turin
- Italy
| | - Emanuela Calcio Gaudino
- Dipartimento di Scienza e Tecnologia del Farmaco and NIS – Centre for Nanostructured Interfaces and Surfaces
- University of Turin
- Via P. Giuria 9
- 10125 Turin
- Italy
| | - Laura Rinaldi
- Dipartimento di Scienza e Tecnologia del Farmaco and NIS – Centre for Nanostructured Interfaces and Surfaces
- University of Turin
- Via P. Giuria 9
- 10125 Turin
- Italy
| | - Audrey Ledoux
- Université Claude Bernard Lyon 1
- CNRS-UMR 5246
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires
- CPE – Lyon 43 Boulevard du 11 Novembre 1918
- Lyon
| | - Paolo Larini
- Université Claude Bernard Lyon 1
- CNRS-UMR 5246
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires
- CPE – Lyon 43 Boulevard du 11 Novembre 1918
- Lyon
| | - Giancarlo Cravotto
- Dipartimento di Scienza e Tecnologia del Farmaco and NIS – Centre for Nanostructured Interfaces and Surfaces
- University of Turin
- Via P. Giuria 9
- 10125 Turin
- Italy
| |
Collapse
|
36
|
Athira C, Sunoj RB. Role of Lewis acid additives in a palladium catalyzed directed C-H functionalization reaction of benzohydroxamic acid to isoxazolone. Org Biomol Chem 2016; 15:246-255. [PMID: 27901171 DOI: 10.1039/c6ob02318e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metallic salts as well as protic additives are widely employed in transition metal catalyzed C-H bond functionalization reactions to improve the efficiency of catalytic protocols. In one such example, ZnCl2 and pivalic acid are used as additives in a palladium catalyzed synthesis of isoxazolone from a readily available benzohydroxamic acid under one pot conditions. In this article, we present some important mechanistic insights into the role of ZnCl2 and pivalic acid, gained by using density functional theory (M06) computations. Two interesting modes of action of ZnCl2 are identified in various catalytic steps involved in the formation of isoxazolone. The conventional Lewis acid coordination wherein zinc chloride (ZnCl2·(DMA)) binds to the carbonyl group is found to be more favored in the C-H activation step. However, the participation of a hetero-bimetallic Pd-Zn species is preferred in reductive elimination leading to Caryl-N bond formation. Pivalic acid helps in relay proton transfer in C-H bond activation through a cyclometallation deprotonation (CMD) process. The explicit inclusion of ZnCl2 and solvent N,N-dimethyl acetamide (DMA) stabilizes the transition state and also helps reduce the activation barrier for the C-H bond activation step. The electronic communication between the two metal species is playing a crucial role in stabilizing the Caryl-N bond formation transition state through a Pd-Zn hetero-bimetallic interaction.
Collapse
Affiliation(s)
- C Athira
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Raghavan B Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| |
Collapse
|
37
|
Dupuy S, Zhang K, Goutierre A, Baudoin O. Terminal‐Selective Functionalization of Alkyl Chains by Regioconvergent Cross‐Coupling. Angew Chem Int Ed Engl 2016; 55:14793-14797. [DOI: 10.1002/anie.201608535] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Indexed: 01/06/2023]
Affiliation(s)
- Stéphanie Dupuy
- University of Basel Department of Chemistry St. Johanns-Ring 19, CH- 4056 Basel Switzerland
| | - Ke‐Feng Zhang
- University of Basel Department of Chemistry St. Johanns-Ring 19, CH- 4056 Basel Switzerland
| | - Anne‐Sophie Goutierre
- University of Basel Department of Chemistry St. Johanns-Ring 19, CH- 4056 Basel Switzerland
| | - Olivier Baudoin
- University of Basel Department of Chemistry St. Johanns-Ring 19, CH- 4056 Basel Switzerland
| |
Collapse
|
38
|
Dupuy S, Zhang KF, Goutierre AS, Baudoin O. Terminal-Selective Functionalization of Alkyl Chains by Regioconvergent Cross-Coupling. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608535] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Stéphanie Dupuy
- University of Basel; Department of Chemistry; St. Johanns-Ring 19, CH- 4056 Basel Switzerland
| | - Ke-Feng Zhang
- University of Basel; Department of Chemistry; St. Johanns-Ring 19, CH- 4056 Basel Switzerland
| | - Anne-Sophie Goutierre
- University of Basel; Department of Chemistry; St. Johanns-Ring 19, CH- 4056 Basel Switzerland
| | - Olivier Baudoin
- University of Basel; Department of Chemistry; St. Johanns-Ring 19, CH- 4056 Basel Switzerland
| |
Collapse
|
39
|
Jiménez J, Kim BS, Walsh PJ. Tandem C(sp 3)-H Arylation/Oxidation and Arylation/Allylic Substitution of Isoindolinones. Adv Synth Catal 2016; 358:2829-2837. [PMID: 28652858 PMCID: PMC5482541 DOI: 10.1002/adsc.201600654] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Isoindolinones comprise an important class of medicinally active compounds. Herein we report a straightforward functionalization of the isoindolinones with aryl bromides (22 examples) using a Pd(OAc)2/NIXANTPHOS-based catalyst system. Additionally 3-aryl 3-hydroxy isoindolinone derivatives, which exhibit anti-tumor activity, can be accessed via a tandem reaction. Thus, when the arylation product is exposed to air under basic conditions, in situ oxidation takes place to install the 3-hydroxyl group. Furthermore, a tandem arylation/allylic substitution reaction is advanced in which both the arylation and allylic substitution are catalyzed by the same palladium catalyst. Finally, a tandem arylation/alkylation procedure is presented. These tandem reactions enable the synthesis of a variety of structurally diverse isoindolinone derivatives from common starting materials.
Collapse
Affiliation(s)
- Jacqueline Jiménez
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 S, 34 St., Philadelphia, PA 19104-6323 (USA)
| | - Byeong-Seon Kim
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 S, 34 St., Philadelphia, PA 19104-6323 (USA)
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 S, 34 St., Philadelphia, PA 19104-6323 (USA)
| |
Collapse
|
40
|
Goutierre AS, Trinh HV, Larini P, Jazzar R, Baudoin O. Comparative Structural Analysis of Biarylphosphine Ligands in Arylpalladium Bromide and Malonate Complexes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00535] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anne-Sophie Goutierre
- Université Claude Bernard Lyon 1, CNRS UMR 5246 - Institut
de Chimie et Biochimie Moléculaires et Supramoléculaires, CPE Lyon, 43 Boulevard du 11 Novembre
1918, 69622 Villeurbanne, France
| | - Huu Vinh Trinh
- Université Claude Bernard Lyon 1, CNRS UMR 5246 - Institut
de Chimie et Biochimie Moléculaires et Supramoléculaires, CPE Lyon, 43 Boulevard du 11 Novembre
1918, 69622 Villeurbanne, France
| | - Paolo Larini
- Université Claude Bernard Lyon 1, CNRS UMR 5246 - Institut
de Chimie et Biochimie Moléculaires et Supramoléculaires, CPE Lyon, 43 Boulevard du 11 Novembre
1918, 69622 Villeurbanne, France
| | - Rodolphe Jazzar
- Université Claude Bernard Lyon 1, CNRS UMR 5246 - Institut
de Chimie et Biochimie Moléculaires et Supramoléculaires, CPE Lyon, 43 Boulevard du 11 Novembre
1918, 69622 Villeurbanne, France
| | - Olivier Baudoin
- Université Claude Bernard Lyon 1, CNRS UMR 5246 - Institut
de Chimie et Biochimie Moléculaires et Supramoléculaires, CPE Lyon, 43 Boulevard du 11 Novembre
1918, 69622 Villeurbanne, France
| |
Collapse
|
41
|
Lipp A, Lahm G, Opatz T. Light Induced C–C Coupling of 2-Chlorobenzazoles with Carbamates, Alcohols, and Ethers. J Org Chem 2016; 81:4890-7. [DOI: 10.1021/acs.joc.6b00715] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Alexander Lipp
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Günther Lahm
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Till Opatz
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| |
Collapse
|
42
|
Shaw MH, Shurtleff VW, Terrett JA, Cuthbertson JD, MacMillan DWC. Native functionality in triple catalytic cross-coupling: sp³ C-H bonds as latent nucleophiles. Science 2016; 352:1304-8. [PMID: 27127237 DOI: 10.1126/science.aaf6635] [Citation(s) in RCA: 430] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 04/14/2016] [Indexed: 12/15/2022]
Abstract
The use of sp(3) C-H bonds--which are ubiquitous in organic molecules--as latent nucleophile equivalents for transition metal-catalyzed cross-coupling reactions has the potential to substantially streamline synthetic efforts in organic chemistry while bypassing substrate activation steps. Through the combination of photoredox-mediated hydrogen atom transfer (HAT) and nickel catalysis, we have developed a highly selective and general C-H arylation protocol that activates a wide array of C-H bonds as native functional handles for cross-coupling. This mild approach takes advantage of a tunable HAT catalyst that exhibits predictable reactivity patterns based on enthalpic and bond polarity considerations to selectively functionalize α-amino and α-oxy sp(3) C-H bonds in both cyclic and acyclic systems.
Collapse
Affiliation(s)
- Megan H Shaw
- Merck Center for Catalysis at Princeton University, Princeton, NJ 08544, USA
| | - Valerie W Shurtleff
- Merck Center for Catalysis at Princeton University, Princeton, NJ 08544, USA
| | - Jack A Terrett
- Merck Center for Catalysis at Princeton University, Princeton, NJ 08544, USA
| | - James D Cuthbertson
- Merck Center for Catalysis at Princeton University, Princeton, NJ 08544, USA
| | - David W C MacMillan
- Merck Center for Catalysis at Princeton University, Princeton, NJ 08544, USA.
| |
Collapse
|
43
|
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]
|
44
|
Huang Z, Wang C, Dong G. A Hydrazone-Based exo
-Directing-Group Strategy for β C−H Oxidation of Aliphatic Amines. Angew Chem Int Ed Engl 2016; 55:5299-303. [DOI: 10.1002/anie.201600912] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 02/24/2016] [Indexed: 02/02/2023]
Affiliation(s)
- Zhongxing Huang
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
| | - Chengpeng Wang
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
| | - Guangbin Dong
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
| |
Collapse
|
45
|
Huang Z, Wang C, Dong G. A Hydrazone-Based exo
-Directing-Group Strategy for β C−H Oxidation of Aliphatic Amines. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600912] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Zhongxing Huang
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
| | - Chengpeng Wang
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
| | - Guangbin Dong
- Department of Chemistry; University of Texas at Austin; 100 East 24th street Austin TX 78712 USA
| |
Collapse
|
46
|
Peng J, Chen C, Xi C. β-Arylation of oxime ethers using diaryliodonium salts through activation of inert C(sp)-H bonds using a palladium catalyst. Chem Sci 2016; 7:1383-1387. [PMID: 29910895 PMCID: PMC5975923 DOI: 10.1039/c5sc03903g] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 11/11/2015] [Indexed: 11/22/2022] Open
Abstract
An efficient method of selective β-arylation of oxime ethers was realized by using a palladium catalyst with diaryliodonium salts as the key arylation reagents. The reaction proceeded smoothly through the activation of inert C(sp3)-H bonds to give corresponding ketones and aldehydes. This convenient procedure can be successfully applied to construct new C(sp3)-C(sp2) bonds on a number of complex molecules derived from natural products and thus serves as a practical synthetic tool for direct late-stage C(sp3)-H functionalization.
Collapse
Affiliation(s)
- Jing Peng
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education) , Department of Chemistry , Tsinghua University , Beijing 100084 , China .
| | - Chao Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education) , Department of Chemistry , Tsinghua University , Beijing 100084 , China .
| | - Chanjuan Xi
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education) , Department of Chemistry , Tsinghua University , Beijing 100084 , China .
| |
Collapse
|
47
|
Martínez JI, Smith JJ, Hepburn HB, Lam HW. Chain Walking of Allylrhodium Species Towards Esters During Rhodium-Catalyzed Nucleophilic Allylations of Imines. Angew Chem Int Ed Engl 2016; 55:1108-12. [PMID: 26756445 PMCID: PMC4736453 DOI: 10.1002/anie.201508964] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 11/04/2015] [Indexed: 11/10/2022]
Abstract
Allylrhodium species derived from δ-trifluoroboryl β,γ-unsaturated esters undergo chain walking towards the ester moiety. The resulting allylrhodium species react with imines to give products containing two new stereocenters and a Z-alkene. By using a chiral diene ligand, products can be obtained with high enantioselectivities, where a pronounced matched/mismatched effect with the chirality of the allyltrifluoroborate is evident.
Collapse
Affiliation(s)
- Jose I Martínez
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Joshua J Smith
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Hamish B Hepburn
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Hon Wai Lam
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
| |
Collapse
|
48
|
Firth JD, O’Brien P, Ferris L. Synthesis of Enantiopure Piperazines via Asymmetric Lithiation–Trapping of N-Boc Piperazines: Unexpected Role of the Electrophile and Distal N-Substituent. J Am Chem Soc 2015; 138:651-9. [DOI: 10.1021/jacs.5b11288] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- James D. Firth
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Peter O’Brien
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Leigh Ferris
- AstraZeneca U.K., Macclesfield, Cheshire SK10 2NA, U.K
| |
Collapse
|
49
|
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
| |
Collapse
|
50
|
Martínez JI, Smith JJ, Hepburn HB, Lam HW. Chain Walking of Allylrhodium Species Towards Esters During Rhodium-Catalyzed Nucleophilic Allylations of Imines. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508964] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Jose I. Martínez
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD UK
| | - Joshua J. Smith
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD UK
| | - Hamish B. Hepburn
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD UK
| | - Hon Wai Lam
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD UK
| |
Collapse
|