1
|
Jo J, Kim S, Park S, Kim S, Lee S, Choi JH, Chung WJ. Study on Pyridine-Boryl Radical-Promoted, Ketyl Radical-Mediated Carbon-Carbon Bond-Forming Reactions. J Org Chem 2024; 89:8985-9000. [PMID: 38861548 DOI: 10.1021/acs.joc.4c00946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Ketyl radicals are synthetically versatile reactive species, but their applications have been hampered by harsh generation conditions employing highly reducing metals. Recently, the pyridine-boryl radical received wide attention as a promising organic reductant because of its mildness as well as convenience in handling. While probing the utility of the pyridine-boryl radical, our group observed facile pinacol coupling reactivity that had not been known at that time. This serendipitous finding was successfully rendered into a practical synthesis of tetraaryl-1,2-diols in up to 99% yield within 1 h. Subsequently, upon examinations of various reaction manifolds, a diastereoselective ketyl-olefin cyclization was accomplished to produce cycloalkanols such as trans-2-alkyl-1-indanols. Compared to the previous methods, the stereocontrolling ability was considerably enhanced by taking advantage of the structurally modifiable boryl group that would be present near the bond-forming site. In this full account, our synthetic efforts with the O-boryl ketyl radicals are disclosed in detail, covering the discovery, optimization, scope expansion, and mechanistic analysis, including density functional theory (DFT) calculations.
Collapse
Affiliation(s)
- Junhyuk Jo
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Somi Kim
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Seonyoung Park
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Seonyul Kim
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Sunggi Lee
- Department of Physics and Chemistry, DGIST, 333 Techno jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu 42988, Republic of Korea
| | - Jun-Ho Choi
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Won-Jin Chung
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| |
Collapse
|
2
|
Chi Z, Liao JB, Cheng X, Ye Z, Yuan W, Lin YM, Gong L. Asymmetric Cross-Coupling of Aldehydes with Diverse Carbonyl or Iminyl Compounds by Photoredox-Mediated Cobalt Catalysis. J Am Chem Soc 2024; 146:10857-10867. [PMID: 38587540 DOI: 10.1021/jacs.4c01443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
The asymmetric cross-coupling of unsaturated bonds, hampered by their comparable polarity and reactivity, as well as the scarcity of efficient catalytic systems capable of diastereo- and enantiocontrol, presents a significant hurdle in organic synthesis. In this study, we introduce a highly adaptable photochemical cobalt catalysis framework that facilitates chemo- and stereoselective reductive cross-couplings between common aldehydes with a broad array of carbonyl and iminyl compounds, including N-acylhydrazones, aryl ketones, aldehydes, and α-keto esters. Our methodology hinges on a synergistic mechanism driven by photoredox-induced single-electron reduction and subsequent radical-radical coupling, all precisely guided by a chiral cobalt catalyst. Various optically enriched β-amino alcohols and unsymmetrical 1,2-diol derivatives (80 examples) have been synthesized with good yields (up to 90% yield) and high stereoselectivities (up to >20:1 dr, 99% ee). Of particular note, this approach accomplishes unattainable photochemical asymmetric transformations of aldehydes with disparate carbonyl partners without reliance on any external photosensitizer, thereby further emphasizing its versatility and cost-efficiency.
Collapse
Affiliation(s)
- Zhiyong Chi
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Jia-Bin Liao
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Xiuliang Cheng
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Ziqi Ye
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Wei Yuan
- Department of Pharmacy, Xiamen Medical College, Xiamen 361023, China
| | - Yu-Mei Lin
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Lei Gong
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, China
| |
Collapse
|
3
|
Kwak D, Jung S, Ha H, Han T, Ryu DH, Kim H, Kwak J. Electroreductive Access to 1,2-Aminoalcohols via Cross Aza-Pinacol Coupling of N-Acyl Diarylketimines and Aldehydes. Org Lett 2024; 26:2733-2738. [PMID: 37417822 DOI: 10.1021/acs.orglett.3c01543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
We present highly efficient and operationally simple synthetic methods for 1,2-aminoalcohols via electroreductive cross aza-pinacol coupling between N-acyl diarylketimines and aldehydes. Preliminary mechanistic studies including cyclic voltammetry and density functional theory (DFT) calculations suggest that the reaction is instigated by selective electrochemical single electron transfer (SET) of N-acylketimines. The developed electrochemical protocol is compatible to biorelevant functional groups, enabling late-stage functionalization of pharmacophores.
Collapse
Affiliation(s)
- Dongmin Kwak
- Infectious Diseases Therapeutic Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
- Department of Chemistry, Sungkyunkwan University, Jangan, Suwon 16419, Republic of Korea
| | - Sehwa Jung
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Hyeonbin Ha
- Infectious Diseases Therapeutic Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Taedong Han
- Discovery Chemistry, Dong-A ST Research Institute, Yongin 17073, Republic of Korea
| | - Do Hyun Ryu
- Department of Chemistry, Sungkyunkwan University, Jangan, Suwon 16419, Republic of Korea
| | - Hyunwoo Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- Institute for Convergence Research and Education in Advanced Technology (I-CREATE), Yonsei University, Seoul 03722, Republic of Korea
| | - Jaesung Kwak
- Infectious Diseases Therapeutic Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
- Division of Medicinal Chemistry and Pharmacology, KRICT School, University of Science and Technology, Daejeon 34114, Republic of Korea
| |
Collapse
|
4
|
Cui DQ, Wang YQ, Zhou B, Ye LW. Brønsted-Acid-Catalyzed Enantioselective Desymmetrization of 1,3-Diols: Access to Chiral β-Amino Alcohol Derivatives. Org Lett 2023; 25:9130-9135. [PMID: 38112554 DOI: 10.1021/acs.orglett.3c03525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Herein, we describe a Brønsted-acid-catalyzed enantioselective desymmetrization of 1,3-diols with alkynes through a hydroalkoxylation/hydrolysis process. The reaction leads to the atom-economical synthesis of valuable chiral β-amino alcohols under mild reaction conditions. Further synthetic transformations based on the β-amino alcohol moiety provide divergent approaches toward chiral N-containing heterocycles.
Collapse
Affiliation(s)
- Da-Qiu Cui
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
| | - Yu-Qi Wang
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
| | - Bo Zhou
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
| | - Long-Wu Ye
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
- State Key Laboratory of Organometallic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
| |
Collapse
|
5
|
Liu J, Du YY, He YS, Liang Y, Liu SZ, Li YY, Cao YM. Parallel kinetic resolution of aziridines via chiral phosphoric acid-catalyzed apparent hydrolytic ring-opening. Chem Sci 2023; 14:12152-12159. [PMID: 37969581 PMCID: PMC10631200 DOI: 10.1039/d3sc03899h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 10/10/2023] [Indexed: 11/17/2023] Open
Abstract
We report a chiral phosphoric acid catalyzed apparent hydrolytic ring-opening reaction of racemic aziridines in a regiodivergent parallel kinetic resolution manner. Harnessing the acyloxy-assisted strategy, the highly stereocontrolled nucleophilic ring-opening of aziridines with water is achieved. Different kinds of aziridines are applicable in the process, giving a variety of enantioenriched aromatic or aliphatic amino alcohols with up to 99% yields and up to >99.5 : 0.5 enantiomeric ratio. Preliminary mechanistic study as well as product elaborations were inducted as well.
Collapse
Affiliation(s)
- Juan Liu
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Yi-Ying Du
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Yu-Shi He
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Yan Liang
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Shang-Zhong Liu
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Yi-Yi Li
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| | - Yi-Ming Cao
- College of Science & China Key Laboratory of National Forestry and Grassland Administration on Pest Chemical Control, China Agricultural University Beijing 100193 China
| |
Collapse
|
6
|
Hu H, Wang Z. Cr-Catalyzed Asymmetric Cross Aza-Pinacol Couplings for β-Amino Alcohol Synthesis. J Am Chem Soc 2023; 145:20775-20781. [PMID: 37703906 DOI: 10.1021/jacs.3c08493] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
Chiral β-amino alcohols are crucial structural motifs found in pharmaceuticals, natural products, and chiral ligands in asymmetric catalysis. Despite previous advances, the development of catalytic approaches to access β-amino alcohols bearing vicinal stereocenters from readily available chemicals remains a prominent challenge. Herein, we describe the Cr-catalyzed asymmetric cross aza-pinacol coupling of aldehydes and N-sulfonyl imines. This protocol proceeds in a radical-polar crossover manner from the intermediacy of an α-amino radical instead of a ketyl radical. Key to the success is using a chiral chromium catalyst, which plays a triple role in the chemoselective single-electron reduction of the imine, fast radical interception to inhibit radical addition to imines, and chemo- and stereoselective addition to aldehydes instead of imines. This method provides a modular and efficient approach to accessing diverse β-amino alcohols bearing vicinal stereocenters.
Collapse
Affiliation(s)
- Hui Hu
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province Department of Chemistry School of Science, Westlake University, Hangzhou 310030, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Zhaobin Wang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province Department of Chemistry School of Science, Westlake University, Hangzhou 310030, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| |
Collapse
|
7
|
Collins S, Sieber JD. Studies Toward Improved Enantiocontrol in the Asymmetric Cu-Catalyzed Reductive Coupling of Ketones and Allenamides: 1,2-Aminoalcohol Synthesis. Org Lett 2023; 25:1425-1430. [PMID: 36847445 DOI: 10.1021/acs.orglett.3c00157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Herein, we report the development of an improved system for the Cu-catalyzed enantioselective reductive coupling of ketones and allenamides through the optimization of the allenamide to avoid an on-cycle rearrangement. High enantioselectivities could be obtained for a variety of ketones. Use of the acyclic allenamides described herein selectively generated anti-diastereomers in contrast to cyclic allenamides that were previously shown to favor the syn-form. A rationale for this change in diastereoselectivity is also presented.
Collapse
Affiliation(s)
- Stephen Collins
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-3028, United States
| | - Joshua D Sieber
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-3028, United States
| |
Collapse
|
8
|
Kukhtin-Ramirez-Reaction-Inspired Deprotection of Sulfamidates for the Synthesis of Amino Sugars. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010182. [PMID: 36615376 PMCID: PMC9822045 DOI: 10.3390/molecules28010182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/14/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022]
Abstract
Herein, we present a mild strategy for deprotecting cyclic sulfamidates via the Kukhtin-Ramirez reaction to access amino sugars. The method features the removal of the sulfonic group of cyclic sulfamidates, which occurs through an N-H insertion reaction that implicates the Kukhtin-Ramirez adducts, followed by a base-promoted reductive N-S bond cleavage. The mild reaction conditions of the protocol enable the formation of amino alcohols including analogs that bear multiple functional groups.
Collapse
|
9
|
Brześkiewicz J, Loska R. Palladium-Catalyzed Access to Benzocyclobutenone-Derived Ketonitrones via C(sp 2)-H Functionalization. Org Lett 2022; 24:3960-3964. [PMID: 35613705 PMCID: PMC9278523 DOI: 10.1021/acs.orglett.2c01317] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
The palladium-catalyzed C(sp2)-H functionalization of bromoaryl aldonitrones leading to benzocyclobutenone-derived ketonitrones is described. This method allows for the preparation of a wide range of strained, four-membered ketonitrones with broad functional group tolerance. Downstream transformations of the formed products were readily demonstrated, illustrating the synthetic utility of the obtained benzocyclobutenone-derived nitrones for the construction of polycyclic nitrogen-containing scaffolds.
Collapse
Affiliation(s)
- Jakub Brześkiewicz
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Rafał Loska
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| |
Collapse
|
10
|
Jin T, Lu C, Ham WH, Zhao L, Zheng ZB. Total Synthesis of Natural Products and Medicinal Molecules via Chelation-Controlled Diastereoselective Hydride Reduction of Amino Ketones. HETEROCYCLES 2022. [DOI: 10.3987/rev-21-969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
11
|
Zhou XY, Chen X. ZnCl2 Catalyzed Ring-Opening Reaction of Symmetrical Epoxides with Aromatic Amines for the Synthesis of 1,2-Amino Alcohols. ORG PREP PROCED INT 2021. [DOI: 10.1080/00304948.2021.1994289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Xiao-Yu Zhou
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
| | - Xia Chen
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
| |
Collapse
|
12
|
Zhou P, Shao X, Malcolmson SJ. A Diastereodivergent and Enantioselective Approach to syn- and anti-Diamines: Development of 2-Azatrienes for Cu-Catalyzed Reductive Couplings with Imines That Furnish Allylic Amines. J Am Chem Soc 2021; 143:13999-14008. [PMID: 34424694 DOI: 10.1021/jacs.1c07707] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We introduce a new reagent class, 2-azatrienes, as a platform for catalytic enantioselective synthesis of allylic amines. Herein, we demonstrate their promise by a diastereodivergent synthesis of syn- and anti-1,2-diamines through their Cu-bis(phosphine)-catalyzed reductive couplings with imines. With Ph-BPE as the supporting ligand, anti-diamines are obtained (up to 91% yield, >20:1 dr, and >99:1 er), and with the rarely utilized t-Bu-BDPP, syn-diamines are generated (up to 76% yield, 1:>20 dr, and 97:3 er).
Collapse
Affiliation(s)
- Pengfei Zhou
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Xinxin Shao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, Zhejiang 310036, P. R. China
| | - Steven J Malcolmson
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| |
Collapse
|
13
|
Klake RK, Edwards MD, Sieber JD. Synthesis of 1,2-Aminoalcohols through Enantioselective Aminoallylation of Ketones by Cu-Catalyzed Reductive Coupling. Org Lett 2021; 23:6444-6449. [PMID: 34347500 PMCID: PMC8384047 DOI: 10.1021/acs.orglett.1c02258] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we report the development of a catalytic enantioselective addition of N-substituted allyl equivalents to ketone electrophiles through use of Cu-catalyzed reductive coupling to access important chiral 1,2-aminoalcohol synthons in high levels of regio-, diastereo-, and enantioselectivity. Factors affecting enantioinduction are discussed including the identification of a reversible ketone allylation step that has not been previously reported in Cu-catalyzed reductive coupling.
Collapse
Affiliation(s)
- Raphael K Klake
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-3028, United States
| | - Mytia D Edwards
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-3028, United States
| | - Joshua D Sieber
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-3028, United States.,Medicines for All Institute, VCU, Biotech 8, 737 North Fifth Street, Richmond, Virginia 23219, United States
| |
Collapse
|
14
|
Tb2(WO4)3@N-GQDs-FA as an efficient nanocatalyst for the efficient synthesis of β-aminoalcohols in aqueous solution. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115555] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
15
|
Rafferty SM, Rutherford JE, Zhang L, Wang L, Nagib DA. Cross-Selective Aza-Pinacol Coupling via Atom Transfer Catalysis. J Am Chem Soc 2021; 143:5622-5628. [DOI: 10.1021/jacs.1c00886] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Sean M. Rafferty
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Joy E. Rutherford
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Lumin Zhang
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Lu Wang
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - David A. Nagib
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| |
Collapse
|
16
|
Brześkiewicz J, Stańska B, Dąbrowski P, Loska R. C−H Activation and Cross‐Coupling of Acyclic Aldonitrone. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001496] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jakub Brześkiewicz
- Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
| | - Barbara Stańska
- Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
| | - Piotr Dąbrowski
- Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
| | - Rafał Loska
- Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
| |
Collapse
|
17
|
Liu C, Qi Y, Liu Y. Recent Development of Samarium Diiodide and Other Samarium Reagents in Organic Transformation. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202011034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
18
|
Mishra AA, Bhanage BM. Ru-Tethered ( R,R)-TsDPEN with DMAB as an efficient catalytic system for high enantioselective one-pot synthesis of chiral β-aminol via asymmetric transfer hydrogenation. NEW J CHEM 2021. [DOI: 10.1039/d0nj06108e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work reflects Ru-tethered-TsDPEN as an active chiral catalyst for one pot selective synthesis of optically active α-substituted alcohols and its derivatives from α-bromo ketones in the presence of dimethylamine borane (DMAB) as the hydrogen source.
Collapse
Affiliation(s)
- Ashish A. Mishra
- Department of Chemistry
- Institute of Chemical Technology
- Nathalal Parekh Marg
- Mumbai 400019
- India
| | - Bhalchandra M. Bhanage
- Department of Chemistry
- Institute of Chemical Technology
- Nathalal Parekh Marg
- Mumbai 400019
- India
| |
Collapse
|
19
|
Gernet A, Ratovelomanana‐Vidal V, Pirat J, Virieux D, Ayad T. Efficient Synthesis of 2‐Amino‐1‐Arylethanols Through a Lewis Base‐Catalyzed SiCl
4
‐Mediated Asymmetric Passerini‐Type Reaction. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Aurélie Gernet
- CNRS, AM2N, ENSCM Institut Charles Gerhardt UMR 5253 8 rue de l'Ecole Normale 34296 Montpellier France
| | - Virginie Ratovelomanana‐Vidal
- Institute of Chemistry for Life & Health Sciences PSL University, Chimie ParisTech‐CNRS 11 rue Pierre et Marie Curie 75005 Paris France
| | - Jean‐Luc Pirat
- CNRS, AM2N, ENSCM Institut Charles Gerhardt UMR 5253 8 rue de l'Ecole Normale 34296 Montpellier France
| | - David Virieux
- CNRS, AM2N, ENSCM Institut Charles Gerhardt UMR 5253 8 rue de l'Ecole Normale 34296 Montpellier France
| | - Tahar Ayad
- CNRS, AM2N, ENSCM Institut Charles Gerhardt UMR 5253 8 rue de l'Ecole Normale 34296 Montpellier France
- Institute of Chemistry for Life & Health Sciences PSL University, Chimie ParisTech‐CNRS 11 rue Pierre et Marie Curie 75005 Paris France
| |
Collapse
|
20
|
Otevrel J, Svestka D, Bobal P. One-pot method for the synthesis of 1-aryl-2-aminoalkanol derivatives from the corresponding amides or nitriles. RSC Adv 2020; 10:25029-25045. [PMID: 35557503 PMCID: PMC9092634 DOI: 10.1039/d0ra04359a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 06/09/2020] [Indexed: 12/15/2022] Open
Abstract
We have identified a novel one-pot method for the synthesis of β-amino alcohols, which is based on C–H bond hydroxylation at the benzylic α-carbon atom with a subsequent nitrile or amide functional group reduction. This cascade process uses molecular oxygen as an oxidant and sodium bis(2-methoxyethoxy)aluminum hydride as a reductant. The substrate scope was examined on 30 entries and, although the respective products were provided in moderate yields only, the above simple protocol may serve as a direct and powerful entry to the sterically congested 1,2-amino alcohols that are difficult to prepare by other routes. The plausible mechanistic rationale for the observed results is given and the reaction was applied to a synthesis of a potentially bioactive target. A one-pot method for β-amino alcohol synthesis based on α-hydroxylation and subsequent amide or nitrile functional group reduction has been identified and examined.![]()
Collapse
Affiliation(s)
- Jan Otevrel
- Department of Chemical Drugs, Faculty of Pharmacy, Masaryk University Palackeho 1946/1 612 42 Brno Czech Republic
| | - David Svestka
- Department of Chemical Drugs, Faculty of Pharmacy, Masaryk University Palackeho 1946/1 612 42 Brno Czech Republic
| | - Pavel Bobal
- Department of Chemical Drugs, Faculty of Pharmacy, Masaryk University Palackeho 1946/1 612 42 Brno Czech Republic
| |
Collapse
|
21
|
Li X, Hall DG. Stereodivergent Asymmetric Synthesis of α,β-Disubstituted β-Aminoalkylboronic Acid Derivatives via Group-Selective Protodeboronation Enabling Access to the Elusive Anti Isomer. J Am Chem Soc 2020; 142:9063-9069. [PMID: 32320234 DOI: 10.1021/jacs.0c03207] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chiral β-aminoalkylboronates generate growing interest as versatile synthetic building blocks to access β-aminoalcohols and other useful compounds, and also as bioisosteres of β-amino acids in drug discovery. In this study, the lack of methodology to access both syn and anti diastereomers of optically enriched, acyclic α,β-disubstituted β-aminoalkylboronates is addressed with the development of a divergent, diastereoselective strategy for the monoprotodeboration of β-amino gem-bis(boronate) precursors. To this end, new reaction conditions were successfully optimized to provide the elusive anti diastereomer by inverting a sequence of desulfinylation and protodeboronation. The desired syn or anti isomers are isolated independently in good yields and excellent diastereoselectivity (up to >20:1 dr) for a wide scope of substituents. The diastereotopic group selectivity of the new conditions yielding the anti isomer is rationalized by invoking a reactive rotamer featuring two ammonium-boronate hydrogen bonds, which enables phosphate coordination to boron with a concomitant, stereoretentive protonation of the least sterically hindered C-B bond. The accessibility and utility of both diastereomers of these α,β-disubstituted β-aminoalkylboronates is exemplified with the functionalization of the amino group, stereospecific oxidation to β-amino alcohols and C-C bond transformations of the secondary alkylboronate, and the preparation of free boronic acids and hemiboronic heterocycles.
Collapse
Affiliation(s)
- Xiangyu Li
- Department of Chemistry, Centennial Centre for Interdisciplinary Science, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Dennis G Hall
- Department of Chemistry, Centennial Centre for Interdisciplinary Science, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| |
Collapse
|
22
|
Baker JR, Russell CC, Gilbert J, Sakoff JA, McCluskey A. Amino Alcohol Acrylonitriles as Activators of the Aryl Hydrocarbon Receptor Pathway: An Unexpected MTT Phenotypic Screening Outcome. ChemMedChem 2020; 15:490-505. [PMID: 32012442 DOI: 10.1002/cmdc.201900643] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/10/2020] [Indexed: 02/06/2023]
Abstract
Lead (Z)-N-(4-(2-cyano-2-(3,4-dichlorophenyl)vinyl)phenyl)acetamide, 1 showed MCF-7 GI50 =30 nM and 400-fold selective c.f. MCF10A (normal breast tissue). Acetamide moiety modification (13 a-g) to introduce additional hydrophobicity was favoured with MCF-7 breast cancer cell activity enhanced at 1.3 nM. Other analogues were potent against the HT29 colon cancer cell line at 23 nM. Textbook SAR data was observed in the MCF-7 cell line, in an MTT assay, via the ortho (17 a), meta (17 b) and para (13 f). The amino alcohol -OH moiety was pivotal, but no stereochemical preference noted. But, these data did not fit our homology modelling expectations. Aberrant MTT ((3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl-tetrazolium bromide) screening results and metabolic interference confirmed by sulforhodamine B (SRB) screening. Interfering analogues resulted in 120 and 80-fold CYP1A1 and CYP1A2 amplification, with no upregulation of SULT1A1. This is consistent with activation of the AhR pathway. Piperidine per-deuteration reduced metabolic inactivation. 3-OH / 4-OH piperidine analogues showed differential MTT and SRB activity supporting MTT assay metabolic inactivation. Data supports piperidine 3-OH, but not the 4-OH, as a CYP substrate. This family of β-amino alcohol substituted 3,4-dichlorophenylacetonitriles show broad activity modulated via the AhR pathway. By SRB analysis the most potent analogue was 23 b, (Z)-3-(4-(3-(4-phenylpiperidin-1-yl)-2-hydroxypropoxy)phenyl)-2-(3,4-dichlorophenyl)-acrylonitrile.
Collapse
Affiliation(s)
- Jennifer R Baker
- Department of Chemistry, The University of Newcastle University Drive, Callaghan, NSW 2308, Australia
| | - Cecilia C Russell
- Department of Chemistry, The University of Newcastle University Drive, Callaghan, NSW 2308, Australia
| | - Jayne Gilbert
- Experimental Therapeutics Group Department of Medical Oncology, Calvary Mater Hospital, Edith Street, Waratah, NSW 2298, Australia
| | - Jennette A Sakoff
- Experimental Therapeutics Group Department of Medical Oncology, Calvary Mater Hospital, Edith Street, Waratah, NSW 2298, Australia
| | - Adam McCluskey
- Department of Chemistry, The University of Newcastle University Drive, Callaghan, NSW 2308, Australia
| |
Collapse
|
23
|
Mitsui A, Nagao K, Ohmiya H. Copper-Catalyzed Enantioselective Reductive Cross-Coupling of Aldehydes and Imines. Org Lett 2020; 22:800-803. [PMID: 31916779 DOI: 10.1021/acs.orglett.9b04144] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A copper-catalyzed enantioselective reductive cross-coupling using aromatic aldehydes and imines, producing chiral β-amino alcohols, is described. The catalytic formation of enantioenriched chiral α-alkoxyalkylcopper(I) species from aromatic aldehydes and the subsequent reaction with imine electrophiles are attractive features of this protocol.
Collapse
Affiliation(s)
- Atsuhisa Mitsui
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan
| | - Kazunori Nagao
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan
| | - Hirohisa Ohmiya
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan
| |
Collapse
|
24
|
Narczyk A, Stecko S. An entry to non-racemic β-tertiary-β-amino alcohols, building blocks for the synthesis of aziridine, piperazine, and morpholine scaffolds. Org Biomol Chem 2020; 18:5972-5981. [DOI: 10.1039/d0ob01315c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of α-dialkyl-substituted non-racemic allyl alcohols and their transformation into enantiomerically enriched 1,1-dialkylated 1,2-aminoalcohols, aziridines, morpholines and piperazines is reported.
Collapse
Affiliation(s)
- Aleksandra Narczyk
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | - Sebastian Stecko
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| |
Collapse
|
25
|
Gargaro SL, Klake RK, Burns KL, Elele SO, Gentry SL, Sieber JD. Access to a Catalytically Generated Umpolung Reagent through the Use of Cu-Catalyzed Reductive Coupling of Ketones and Allenes for the Synthesis of Chiral Vicinal Aminoalcohol Synthons. Org Lett 2019; 21:9753-9758. [PMID: 31769994 PMCID: PMC6902281 DOI: 10.1021/acs.orglett.9b03937] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We report the development of a stereoselective method for the allylation of ketones utilizing N-substituted allyl equivalents generated from a chiral allenamide. By employing N-heterocyclic carbenes as ligands for the Cu catalyst, good branched selectivity can be obtained with high diastereocontrol. This methodology allows access to a catalytically generated, polarity-reversed (umpolung) allyl nucleophile to enable the preparation of chiral 1,2-aminoalcohol synthons containing a dissonant functional group relationship.
Collapse
Affiliation(s)
- Samantha L Gargaro
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , Richmond , Virginia 23284-3028 , United States
| | - Raphael K Klake
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , Richmond , Virginia 23284-3028 , United States
| | - Kevin L Burns
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , Richmond , Virginia 23284-3028 , United States
| | - Sharon O Elele
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , Richmond , Virginia 23284-3028 , United States
| | - Skyler L Gentry
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , Richmond , Virginia 23284-3028 , United States
| | - Joshua D Sieber
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , Richmond , Virginia 23284-3028 , United States
| |
Collapse
|
26
|
Abstract
Enantiopure β-amino alcohols constitute one of the most significant building blocks for the synthesis of active pharmaceutical ingredients. Despite the availability of a range of chiral β-amino alcohols from a chiral pool, there is a growing demand for new enantioselective synthetic routes to vicinal amino alcohols and their derivatives. In the present study, an asymmetric 2-step catalytic route that converts 4-anisaldehyde into a β-amino alcohol derivative, (S)-tembamide, with excellent enantiopurity (98% enantiomeric excess) has been developed. The recently published initial step consists in a concurrent biocatalytic cascade for the synthesis of (S)-4-methoxymandelonitrile benzoate. The O-benzoyl cyanohydrin is then converted to (S)-tembamide in a hydrogenation reaction catalyzed by Raney Ni. To achieve hydrogenation of the nitrile moiety with highest chemoselectivity and enantioretention, various parameters such as nature of the catalyst, reaction temperature and hydrogen pressure were studied. The reported strategy might be transferrable to the synthesis of other N-acyl-β-amino alcohols.
Collapse
|
27
|
Calleja P, Ernst M, Hashmi ASK, Schaub T. Ruthenium-Catalyzed Deaminative Hydrogenation of Amino Nitriles: Direct Access to 1,2-Amino Alcohols. Chemistry 2019; 25:9498-9503. [PMID: 30848852 DOI: 10.1002/chem.201900531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 03/07/2019] [Indexed: 12/22/2022]
Abstract
A new approach for the efficient and highly selective synthesis of 1,2-amino alcohols by direct reductive hydrolysis of N-formyl-protected α-amino nitriles is reported. The commercially available RuHCl(CO)(PPh3 )3 complex was found to be a suitable catalyst for this operationally simple protocol, in which no stoichiometric amounts of undesired metal waste are generated. The deaminative hydrogenation is performed at 55 bar of H2 , using a 6:1 mixture of 1,4-dioxane/water as solvent. In addition, hydroxymethyl alcohols were prepared from cyanoketones under very similar conditions.
Collapse
Affiliation(s)
- Pilar Calleja
- Catalysis Research Laboratory (CaRLa), Im Neuenheimer Feld 584, 69120, Heidelberg, Germany
| | - Martin Ernst
- Synthesis and Homogeneous Catalysis., BASF SE, Carl-Bosch-Str. 38, 67056, Ludwigshafen, Germany
| | - A Stephen K Hashmi
- Catalysis Research Laboratory (CaRLa), Im Neuenheimer Feld 584, 69120, Heidelberg, Germany.,Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Thomas Schaub
- Catalysis Research Laboratory (CaRLa), Im Neuenheimer Feld 584, 69120, Heidelberg, Germany.,Synthesis and Homogeneous Catalysis., BASF SE, Carl-Bosch-Str. 38, 67056, Ludwigshafen, Germany
| |
Collapse
|
28
|
Herrera BT, Moor SR, McVeigh M, Roesner EK, Marini F, Anslyn EV. Rapid Optical Determination of Enantiomeric Excess, Diastereomeric Excess, and Total Concentration Using Dynamic-Covalent Assemblies: A Demonstration Using 2-Aminocyclohexanol and Chemometrics. J Am Chem Soc 2019; 141:11151-11160. [PMID: 31251589 DOI: 10.1021/jacs.9b03844] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Optical analysis of reaction parameters such as enantiomeric excess (ee), diastereomeric excess (de), and yield are becoming increasingly useful as assays for differing functional groups become available. These assays typically exploit reversible covalent or noncovalent assemblies that impart optical signals, commonly circular dichroism (CD), that are indicative of the stereochemistry and ee at a stereocenter proximal to the functional group of interest. Very few assays have been reported that determine ee and de when two stereocenters are present, and none have targeted two different functional groups that are vicinal and lack chromophores entirely. Using a CD assay that targets chiral secondary alcohols, a separate CD assay for chiral primary amines, a UV-vis assay for de, and a fluorescence assay for concentration, we demonstrate a work-flow for speciation of the enantiomers and diastereomers of 2-aminocyclohexanol as a test-bed analyte. Because of the fact the functional groups are vicinal, we found that the ee determination at the two stereocenters is influenced by the adjacent center, and this led us to implement a chemometric patterning approach, resulting in a 4% absolute error in full speciation of the four stereoisomers. The procedure presented herein would allow for the total speciation of around 96 reactions in 27 min using a high-throughput experimentation routine. While 2-aminocyclohexanol is used to demonstrate the methods, the general workflow should be amenable to analysis of other stereoisomers when two stereocenters are present.
Collapse
Affiliation(s)
- Brenden T Herrera
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Sarah R Moor
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Matthew McVeigh
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Emily K Roesner
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Federico Marini
- Department of Chemistry , University of Rome "La Sapienza" , P.le Aldo Moro 5 , Rome I-00185 , Italy
| | - Eric V Anslyn
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| |
Collapse
|
29
|
Kise N, Kinameri S, Sakurai T. Reductive coupling of aliphatic cyclic imides and ω-amidoesters with benzophenones by low-valent titanium: Synthesis of 5-diarylmethylene-1,5-dihydropyrrol-2-ones, 6-diarylmethyl-2-pyridones, and ω-(diarylmethylene)lactams. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.05.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
30
|
Chen J, Tian J, Liu F, Liu Y, Zhao G, Yuan W, Zhao B. Intramolecular Umpolung Synthesis of Exocyclic β-Amino Alcohols through Decarboxylative Amination. ACS OMEGA 2018; 3:14671-14679. [PMID: 31458145 PMCID: PMC6644024 DOI: 10.1021/acsomega.8b02324] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Accepted: 10/22/2018] [Indexed: 06/10/2023]
Abstract
An intramolecular aminative Umpolung cyclization strategy has been developed by using α,α-diphenylglycine (2) as the amination and Umpolung reagent. Aldehydes (1) bearing an additional carbonyl group underwent condensation with α,α-diphenylglycine to form an imine, decarboxylation to generate a delocalized 2-azaallylanion, and subsequent intramolecular Umpolung cyclization to produce a variety of exocyclic β-amino alcohols (6) in 60-93% yields with up to >20:1 trans/cis selectivity under mild conditions.
Collapse
Affiliation(s)
- Jianfeng Chen
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, 16 South Yihuan Road, Chengdu 610041, China
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
- University
of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
| | - Jiaxin Tian
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Feng Liu
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Yong Liu
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Guoqing Zhao
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Weicheng Yuan
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, 16 South Yihuan Road, Chengdu 610041, China
| | - Baoguo Zhao
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| |
Collapse
|
31
|
Powell WC, Walczak MA. Asymmetric Synthesis of Chiral 1,2-Amino Alcohols and Morpholin-2-ones from Arylglyoxals. J Org Chem 2018; 83:10487-10500. [PMID: 30039699 DOI: 10.1021/acs.joc.8b01516] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Chiral 1,2-amino alcohols are privileged scaffolds with important applications as drug candidates and chiral ligands. Although various methods for the preparation of this structural motif have been reported, these methods are limited because of the use of precious metals and ligands. Here, we report a practical and high yielding synthesis of chiral 1,2-amino alcohols using arylglyoxals and pseudoephedrine auxiliary. This reaction is catalyzed by a Brønsted acid and provides morpholinone products in high yields and selectivities. The morpholine ring was converted into 1,2-amino alcohols in a two-step protocol.
Collapse
Affiliation(s)
- Wyatt C Powell
- Department of Chemistry and Biochemistry , University of Colorado , Boulder , Colorado 80309 , United States
| | - Maciej A Walczak
- Department of Chemistry and Biochemistry , University of Colorado , Boulder , Colorado 80309 , United States
| |
Collapse
|
32
|
Cossar PJ, Baker JR, Cain N, McCluskey A. In situ epoxide generation by dimethyldioxirane oxidation and the use of epichlorohydrin in the flow synthesis of a library of β-amino alcohols. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171190. [PMID: 29765627 PMCID: PMC5936892 DOI: 10.1098/rsos.171190] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 02/21/2018] [Indexed: 06/08/2023]
Abstract
The flow coupling of epichlorohydrin with substituted phenols, while efficient, limits the nature of the epoxide available for the development of focused libraries of β-amino alcohols. This limitation was encountered in the production of analogues of 1-(4-nitrophenoxy)-3-((2-((4-(trifluoromethyl)pyrimidin-2-yl)amino)ethyl)amino)propan-2-ol 1, a potential antibiotic lead. The in situ (flow) generation of dimethyldoxirane (DMDO) and subsequent flow olefin epoxidation abrogates this limitation and afforded facile access to structurally diverse β-amino alcohols. Analogues of 1 were readily accessed either via (i) a flow/microwave hybrid approach, or (ii) a sequential flow approach. Key steps were the in situ generation of DMDO, with olefin epoxidation in typically good yields and a flow-mediated ring opening aminolysis to form an expanded library of β-amino alcohols 1 and 10a-18g, resulting in modest (11a, 21%) to excellent (12g, 80%) yields. Alternatively flow coupling of epichlorohydrin with phenols 4a-4m (22%-89%) and a Bi(OTf)3 catalysed microwave ring opening with amines afforded a select range of β-amino alcohols, but with lower levels of aminolysis regiocontrol than the sequential flow approach.
Collapse
|
33
|
Reductive coupling of hydantoins with benzophenones by low-valent titanium: Synthesis of 4-substituted 1H-imidazol-2(3H)-ones and unusual two-to-two coupled products. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.01.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
34
|
Dual catalysis for enantioselective convergent synthesis of enantiopure vicinal amino alcohols. Nat Commun 2018; 9:410. [PMID: 29379007 PMCID: PMC5789022 DOI: 10.1038/s41467-017-02698-4] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 12/13/2017] [Indexed: 12/13/2022] Open
Abstract
Enantiopure vicinal amino alcohols and derivatives are essential structural motifs in natural products and pharmaceutically active molecules, and serve as main chiral sources in asymmetric synthesis. Currently known asymmetric catalytic protocols for this class of compounds are still rare and often suffer from limited scope of substrates, relatively low regio- or stereoselectivities, thus prompting the development of more effective methodologies. Herein we report a dual catalytic strategy for the convergent enantioselective synthesis of vicinal amino alcohols. The method features a radical-type Zimmerman–Traxler transition state formed from a rare earth metal with a nitrone and an aromatic ketyl radical in the presence of chiral N,N′-dioxide ligands. In addition to high level of enantio- and diastereoselectivities, our synthetic protocol affords advantages of simple operation, mild conditions, high-yielding, and a broad scope of substrates. Furthermore, this protocol has been successfully applied to the concise synthesis of pharmaceutically valuable compounds (e.g., ephedrine and selegiline). Chiral vicinal amino alcohols are found in many bioactive compounds and may serve as chiral ligands. Here, the authors report a photocatalytic enantioselective cross-coupling of nitrones with aromatic aldehydes with a chiral ligand-coordinated rare earth ion synergistically producing enantiopure vicinal amino alcohols.
Collapse
|
35
|
Li K, Shao X, Tseng L, Malcolmson SJ. 2-Azadienes as Reagents for Preparing Chiral Amines: Synthesis of 1,2-Amino Tertiary Alcohols by Cu-Catalyzed Enantioselective Reductive Couplings with Ketones. J Am Chem Soc 2018; 140:598-601. [PMID: 29272124 PMCID: PMC5936605 DOI: 10.1021/jacs.7b12213] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We introduce a new strategy for synthesis of chiral amines: couplings of α-aminoalkyl nucleophiles generated by enantioselective migratory insertion of 2-azadienes to a Cu-H. In this report, we demonstrate its application in catalytic reductive coupling of 2-azadienes and ketones to furnish 1,2-amino tertiary alcohols with vicinal stereogenic centers.
Collapse
Affiliation(s)
| | | | - Luke Tseng
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Steven J. Malcolmson
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| |
Collapse
|
36
|
Brumsted CJ, Carpenter EL, Indra AK, Mahmud T. Asymmetric Synthesis and Biological Activities of Pactamycin-Inspired Aminocyclopentitols. Org Lett 2018; 20:397-400. [DOI: 10.1021/acs.orglett.7b03681] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Corey J. Brumsted
- Department
of Chemistry and ‡Department of Pharmaceutical Sciences, Oregon State University, Corvallis, Oregon 97333, United States
| | | | | | - Taifo Mahmud
- Department
of Chemistry and ‡Department of Pharmaceutical Sciences, Oregon State University, Corvallis, Oregon 97333, United States
| |
Collapse
|
37
|
Synthesis of Nitrogen Heterocycles Using Samarium(II) Iodide. Molecules 2017; 22:molecules22112018. [PMID: 29160806 PMCID: PMC6150357 DOI: 10.3390/molecules22112018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 11/11/2017] [Accepted: 11/13/2017] [Indexed: 11/19/2022] Open
Abstract
Nitrogen heterocycles represent vital structural motifs in biologically-active natural products and pharmaceuticals. As a result, the development of new, convenient and more efficient processes to N-heterocycles is of great interest to synthetic chemists. Samarium(II) iodide (SmI2, Kagan’s reagent) has been widely used to forge challenging C–C bonds through reductive coupling reactions. Historically, the use of SmI2 in organic synthesis has been focused on the construction of carbocycles and oxygen-containing motifs. Recently, significant advances have taken place in the use of SmI2 for the synthesis of nitrogen heterocycles, enabled in large part by the unique combination of high reducing power of this reagent (E1/2 of up to −2.8 V) with excellent chemoselectivity of the reductive umpolung cyclizations mediated by SmI2. In particular, radical cross-coupling reactions exploiting SmI2-induced selective generation of aminoketyl radicals have emerged as concise and efficient methods for constructing 2-azabicycles, pyrrolidines and complex polycyclic barbiturates. Moreover, a broad range of novel processes involving SmI2-promoted formation of aminyl radicals have been leveraged for the synthesis of complex nitrogen-containing molecular architectures by direct and tethered pathways. Applications to the synthesis of natural products have highlighted the generality of processes and the intermediates accessible with SmI2. In this review, recent advances involving the synthesis of nitrogen heterocycles using SmI2 are summarized, with a major focus on reductive coupling reactions that enable one-step construction of nitrogen-containing motifs in a highly efficient manner, while taking advantage of the spectacular selectivity of the venerable Kagan’s reagent.
Collapse
|
38
|
Huang QX, Zheng QT, Duan Y, Lin JH, Xiao JC, Zheng X. Diastereoselective Synthesis of CF3-Containing Vicinal Diamines. J Org Chem 2017; 82:8273-8281. [DOI: 10.1021/acs.joc.7b01261] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qiu-xia Huang
- Institute
of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation
Center for Molecular Target New Drug Study, University of South China, 28 Western Changsheng Road, Hengyang, Hunan 421001, China
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic
Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Qu-tong Zheng
- Institute
of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation
Center for Molecular Target New Drug Study, University of South China, 28 Western Changsheng Road, Hengyang, Hunan 421001, China
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic
Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Yaya Duan
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic
Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jin-Hong Lin
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic
Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Ji-Chang Xiao
- Institute
of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation
Center for Molecular Target New Drug Study, University of South China, 28 Western Changsheng Road, Hengyang, Hunan 421001, China
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic
Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Xing Zheng
- Institute
of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation
Center for Molecular Target New Drug Study, University of South China, 28 Western Changsheng Road, Hengyang, Hunan 421001, China
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic
Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| |
Collapse
|
39
|
Yang LC, Wang YN, Zhang Y, Zhao Y. Acid-Assisted Ru-Catalyzed Enantioselective Amination of 1,2-Diols through Borrowing Hydrogen. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02959] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Li-Cheng Yang
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Republic of Singapore 117543
| | - Ya-Nong Wang
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Republic of Singapore 117543
| | - Yao Zhang
- College
of Chemistry, Liaoning University, Shenyang, 110036, People’s Republic of China
| | - Yu Zhao
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Republic of Singapore 117543
| |
Collapse
|
40
|
Li XH, Zhu M, Wang ZX, Liu XY, Song H, Zhang D, Wang FP, Qin Y. Synthesis of Atisine, Ajaconine, Denudatine, and Hetidine Diterpenoid Alkaloids by a Bioinspired Approach. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609882] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Xiao-Huan Li
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Min Zhu
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Zhi-Xiu Wang
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Xiao-Yu Liu
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Hao Song
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Dan Zhang
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Feng-Peng Wang
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Yong Qin
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| |
Collapse
|
41
|
Li XH, Zhu M, Wang ZX, Liu XY, Song H, Zhang D, Wang FP, Qin Y. Synthesis of Atisine, Ajaconine, Denudatine, and Hetidine Diterpenoid Alkaloids by a Bioinspired Approach. Angew Chem Int Ed Engl 2016; 55:15667-15671. [PMID: 27860043 DOI: 10.1002/anie.201609882] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Indexed: 02/02/2023]
Affiliation(s)
- Xiao-Huan Li
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Min Zhu
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Zhi-Xiu Wang
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Xiao-Yu Liu
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Hao Song
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Dan Zhang
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Feng-Peng Wang
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| | - Yong Qin
- Key Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry of Education, West China School of Pharmacy and State Key Laboratory of Biotherapy; Sichuan University; Chengdu 610041 P.R. China
| |
Collapse
|
42
|
Racine E, Burchak ON, Py S. Synthesis of α-Acyloxynitrones and Reactivity towards Samarium Diiodide. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600478] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Emilie Racine
- Univ. Grenoble Alpes; DCM; CNRS; DCM; 38000 Grenoble France
| | | | - Sandrine Py
- Univ. Grenoble Alpes; DCM; CNRS; DCM; 38000 Grenoble France
| |
Collapse
|
43
|
Ding W, Lu LQ, Liu J, Liu D, Song HT, Xiao WJ. Visible Light Photocatalytic Radical–Radical Cross-Coupling Reactions of Amines and Carbonyls: A Route to 1,2-Amino Alcohols. J Org Chem 2016; 81:7237-43. [DOI: 10.1021/acs.joc.6b01217] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Wei Ding
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Liang-Qiu Lu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Jing Liu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Dan Liu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Hai-Tao Song
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Wen-Jing Xiao
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| |
Collapse
|
44
|
Acocella MR, D'Urso L, Maggio M, Guerra G. Green Regio- and Enantioselective Aminolysis Catalyzed by Graphite and Graphene Oxide under Solvent-Free Conditions. ChemCatChem 2016. [DOI: 10.1002/cctc.201600241] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maria Rosaria Acocella
- Department of Chemistry and Biology; University of Salerno; Via Giovanni Paolo II 132 Fisciano SA Italy
| | - Luciana D'Urso
- Department of Chemistry and Biology; University of Salerno; Via Giovanni Paolo II 132 Fisciano SA Italy
| | - Mario Maggio
- Department of Chemistry and Biology; University of Salerno; Via Giovanni Paolo II 132 Fisciano SA Italy
| | - Gaetano Guerra
- Department of Chemistry and Biology; University of Salerno; Via Giovanni Paolo II 132 Fisciano SA Italy
| |
Collapse
|
45
|
Christmann M, Hu J, Kitamura M, Stoltz B. Tetrahedron reports on organic chemistry. Tetrahedron 2015. [DOI: 10.1016/s0040-4020(15)00744-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
46
|
Huang PQ, Lang QW, Wang AE, Zheng JF. Direct reductive coupling of secondary amides: chemoselective formation of vicinal diamines and vicinal amino alcohols. Chem Commun (Camb) 2015; 51:1096-9. [DOI: 10.1039/c4cc08330j] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the first direct and chemoselective reductive homocoupling reaction of secondary amides and cross-coupling reaction of secondary amides with ketones. This method relies on the direct generation of α-amino carbon radicals from amides.
Collapse
Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Qi-Wei Lang
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Ai-E Wang
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Jian-Feng Zheng
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| |
Collapse
|
47
|
Streuff J. Reductive umpolung reactions with low-valent titanium catalysts. CHEM REC 2014; 14:1100-13. [PMID: 25234255 DOI: 10.1002/tcr.201402058] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Indexed: 12/24/2022]
Abstract
The coupling of similarly polarized carbon fragments can be achieved by a reductive umpolung strategy. This gives access to compounds with functional groups in even bond distances, which are difficult to synthesize by other means. Low-valent titanium catalysts enable such couplings under mild conditions. This account covers the recent progress on this topic with a focus on the development of cross-selective coupling reactions and stereoselective examples.
Collapse
Affiliation(s)
- Jan Streuff
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, D-79104, Freiburg, Germany.
| |
Collapse
|
48
|
Szostak M, Fazakerley NJ, Parmar D, Procter DJ. Cross-Coupling Reactions Using Samarium(II) Iodide. Chem Rev 2014; 114:5959-6039. [DOI: 10.1021/cr400685r] [Citation(s) in RCA: 290] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Michal Szostak
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Neal J. Fazakerley
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Dixit Parmar
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - David J. Procter
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| |
Collapse
|
49
|
Buesking AW, Ellman JA. Convergent, asymmetric synthesis of vicinal amino alcohols via Rh-catalyzed addition of α-amido trifluoroborates to carbonyls. Chem Sci 2014. [DOI: 10.1039/c4sc00084f] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The convergent, asymmetric synthesis of vicinal amino alcohols is achieved by the Rh-catalyzed addition of α-amido trifluoroborates to carbonyl compounds.
Collapse
|
50
|
Rono LJ, Yayla HG, Wang DY, Armstrong MF, Knowles RR. Enantioselective Photoredox Catalysis Enabled by Proton-Coupled Electron Transfer: Development of an Asymmetric Aza-Pinacol Cyclization. J Am Chem Soc 2013; 135:17735-8. [DOI: 10.1021/ja4100595] [Citation(s) in RCA: 340] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Lydia J. Rono
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Hatice G. Yayla
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - David Y. Wang
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Michael F. Armstrong
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Robert R. Knowles
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| |
Collapse
|