1
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Li Z, Wang Y, Liu D, Ning L, Pu M, Lin L, Feng X. Chiral N, N'-Dioxide Ligands Tune Diastereoselectivity in Mg(II)-Catalyzed Asymmetric Ring-Opening Desymmetrization of Azetidiniums. Org Lett 2023; 25:7612-7616. [PMID: 37842957 DOI: 10.1021/acs.orglett.3c02728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
A diastereodivergent asymmetric desymmetrization of azetidinium salts with benzothiazoleamides as carbon nucleophiles through a chiral N,N'-dioxide/Mg(II) complex-promoted ring-opening reaction is realized by tuning ligands. Both syn- and anti-chiral δ-amino acid derivatives bearing benzothiazole structure were obtained in moderate to good yields and dr and ee values. DFT calculations indicated that the diastereodivergency stems from the different size of the chiral pocket formed by variable substructures of the ligands, leading to the opposite attack direction of the nucleophiles.
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Affiliation(s)
- Zhaojing Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yan Wang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Deyang Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Lichao Ning
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Maoping Pu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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2
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Evarts MM, Strong ZH, Krische MJ. Oxetane-, Azetidine-, and Bicyclopentane-Bearing N-Heterocycles from Ynones: Scaffold Diversification via Ruthenium-Catalyzed Oxidative Alkynylation. Org Lett 2023; 25:5907-5910. [PMID: 37527501 PMCID: PMC10445484 DOI: 10.1021/acs.orglett.3c02213] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
A process for 3-fold scaffold diversification is achieved via ruthenium-catalyzed oxidative alkynylation of commercially available oxetanols, azetidinols and bicyclopentanols to form α,β-acetylenic ketones (ynones), which are subsequently converted to oxetane-, azetidine- and bicyclopentane-bearing pyrazoles, isoxazoles and pyrimidines. A one-pot oxidative alkynylation-condensation protocol that directly converts azetidinols to azetidine-substituted pyrazoles or pyrimidines is demonstrated.
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Affiliation(s)
- Madeline M Evarts
- University of Texas at Austin, Department of Chemistry, Austin, Texas 78712, United States
| | - Zachary H Strong
- University of Texas at Austin, Department of Chemistry, Austin, Texas 78712, United States
| | - Michael J Krische
- University of Texas at Austin, Department of Chemistry, Austin, Texas 78712, United States
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3
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Li M, Chong Q, Meng F. Cobalt-Catalyzed Atom-economical and Regioselective Hydroalkylation of N-Boc-2-azetine with Cobalt Homoenolates. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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4
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Chen L, Qu Q, Ran CK, Wang W, Zhang W, He Y, Liao LL, Ye JH, Yu DG. Photocatalytic Carboxylation of C-N Bonds in Cyclic Amines with CO 2 by Consecutive Visible-Light-Induced Electron Transfer. Angew Chem Int Ed Engl 2023; 62:e202217918. [PMID: 36680762 DOI: 10.1002/anie.202217918] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/22/2023]
Abstract
Visible-light photocatalytic carboxylation with CO2 is highly important. However, it still remains challenging for reluctant substrates with low reduction potentials. Herein, we report a novel photocatalytic carboxylation of C-N bonds in cyclic amines with CO2 via consecutive photo-induced electron transfer (ConPET). It is also the first photocatalytic reductive ring-opening reaction of azetidines, pyrrolidines and piperidines. This strategy is practical to transform a variety of easily available cyclic amines to valuable β-, γ-, δ- and ϵ-amino acids in moderate-to-excellent yields. Moreover, the method also features mild and transition-metal-free conditions, high selectivity, good functional-group tolerance, facile scalability and product derivations. Mechanistic studies indicate that the ConPET might be the key to generating highly reactive photocatalysts, which enable the reductive activation of cyclic amines to generate carbon radicals and carbanions as the key intermediates.
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Affiliation(s)
- Lin Chen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Quan Qu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Chuan-Kun Ran
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Wei Wang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Wei Zhang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Yi He
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Li-Li Liao
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, P. R. China
| | - Jian-Heng Ye
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Da-Gang Yu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
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5
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Dubois MAJ, Rojas JJ, Sterling AJ, Broderick HC, Smith MA, White AJP, Miller PW, Choi C, Mousseau JJ, Duarte F, Bull JA. Visible Light Photoredox-Catalyzed Decarboxylative Alkylation of 3-Aryl-Oxetanes and Azetidines via Benzylic Tertiary Radicals and Implications of Benzylic Radical Stability. J Org Chem 2023; 88:6476-6488. [PMID: 36868184 DOI: 10.1021/acs.joc.3c00083] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
Four-membered heterocycles offer exciting potential as small polar motifs in medicinal chemistry but require further methods for incorporation. Photoredox catalysis is a powerful method for the mild generation of alkyl radicals for C-C bond formation. The effect of ring strain on radical reactivity is not well understood, with no studies that address this question systematically. Examples of reactions that involve benzylic radicals are rare, and their reactivity is challenging to harness. This work develops a radical functionalization of benzylic oxetanes and azetidines using visible light photoredox catalysis to prepare 3-aryl-3-alkyl substituted derivatives and assesses the influence of ring strain and heterosubstitution on the reactivity of small-ring radicals. 3-Aryl-3-carboxylic acid oxetanes and azetidines are suitable precursors to tertiary benzylic oxetane/azetidine radicals which undergo conjugate addition into activated alkenes. We compare the reactivity of oxetane radicals to other benzylic systems. Computational studies indicate that Giese additions of unstrained benzylic radicals into acrylates are reversible and result in low yields and radical dimerization. Benzylic radicals as part of a strained ring, however, are less stable and more π-delocalized, decreasing dimer and increasing Giese product formation. Oxetanes show high product yields due to ring strain and Bent's rule rendering the Giese addition irreversible.
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Affiliation(s)
- Maryne A J Dubois
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Juan J Rojas
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Alistair J Sterling
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, U.K
| | - Hannah C Broderick
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Milo A Smith
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Andrew J P White
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Philip W Miller
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Chulho Choi
- Pfizer Global Research and Development, 445 Eastern Point Rd., Groton, Connecticut 06340, United States
| | - James J Mousseau
- Pfizer Global Research and Development, 445 Eastern Point Rd., Groton, Connecticut 06340, United States
| | - Fernanda Duarte
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, U.K
| | - James A Bull
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
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6
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Trammel GL, Kannangara PB, Vasko D, Datsenko O, Mykhailiuk P, Brown MK. Arylboration of Enecarbamates for the Synthesis of Borylated Saturated N-Heterocycles. Angew Chem Int Ed Engl 2022; 61:e202212117. [PMID: 36250954 PMCID: PMC9643676 DOI: 10.1002/anie.202212117] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Indexed: 11/09/2022]
Abstract
Two catalytic systems have been developed for the arylboration of endocyclic enecarbamates to deliver synthetically versatile borylated saturated N-heterocycles in good regio- and diastereoselectivities. A Cu/Pd dual catalytic reaction enables the synthesis of borylated, α-arylated azetidines, while a Ni-catalysed arylboration reaction efficiently functionalizes 5-, 6-, and 7-membered enecarbamates. In the case of the Cu/Pd-system, a remarkable additive effect was identified that allowed for broader scope. The products are synthetically useful, as demonstrated by manipulations of the boronic ester to access biologically active compounds.
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Affiliation(s)
- Grace L. Trammel
- Department of ChemistryIndiana University800 E. Kirkwood Ave.BloomingtonIN, 47401USA
| | | | | | | | - Pavel Mykhailiuk
- Enamine Ltd.Chervonotkatska 6002094KyivUkraine,Taras Shevchenko National University of KyivChemistry DepartmentVolodymyrska 6401601KyivUkraine
| | - M. Kevin Brown
- Department of ChemistryIndiana University800 E. Kirkwood Ave.BloomingtonIN, 47401USA
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7
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Trammel GL, Kannangara PB, Vasko D, Datsenko O, Mykhailiuk P, Brown MK. Arylboration of Enecarbamates for the Synthesis of Borylated Saturated N‐Heterocycles. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202212117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Grace L. Trammel
- Department of Chemistry Indiana University 800 E. Kirkwood Ave. Bloomington IN, 47401 USA
| | | | - Dmytro Vasko
- Enamine Ltd. Chervonotkatska 60 02094 Kyiv Ukraine
| | | | - Pavel Mykhailiuk
- Enamine Ltd. Chervonotkatska 60 02094 Kyiv Ukraine
- Taras Shevchenko National University of Kyiv Chemistry Department Volodymyrska 64 01601 Kyiv Ukraine
| | - M. Kevin Brown
- Department of Chemistry Indiana University 800 E. Kirkwood Ave. Bloomington IN, 47401 USA
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8
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Stafford NP, Cheng MJ, Dinh DN, Verboom KL, Krische MJ. Chiral α-Stereogenic Oxetanols and Azetidinols via Alcohol-Mediated Reductive Coupling of Allylic Acetates: Enantiotopic π-Facial Selection in Symmetric Ketone Addition. ACS Catal 2022; 12:6172-6179. [PMID: 37063244 PMCID: PMC10104534 DOI: 10.1021/acscatal.2c01647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Iridium-tol-BINAP-catalyzed reductive coupling of allylic acetates with oxetanones and azetidinones mediated by 2-propanol provides chiral α-stereogenic oxetanols and azetidinols. As illustrated in 50 examples, complex, nitrogen-rich substituents that incorporate the top 10 N-heterocycles found in FDA-approved drugs are tolerated. In addition to 2-propanol-mediated reductive couplings, oxetanols and azetidinols may serve dually as reductant and ketone proelectrophiles in redox-neutral C-C couplings via hydrogen auto-transfer, as demonstrated by the conversion of dihydro-1a and dihydro-1b to adducts 3a and 4a, respectively. The present method delivers hitherto inaccessible chiral oxetanols and azetidinols, which are important bioisosteres.
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Affiliation(s)
- Nicholas P. Stafford
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Melinda J. Cheng
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Duong Nguyen Dinh
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Katherine L. Verboom
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Michael J. Krische
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
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9
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Azetidine synthesis enabled by photo-induced copper-catalysis via [3+1] radical cascade cyclization. Innovation (N Y) 2022; 3:100244. [PMID: 35519513 PMCID: PMC9065902 DOI: 10.1016/j.xinn.2022.100244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 04/12/2022] [Indexed: 12/02/2022] Open
Abstract
Azetidines are an important type of saturated, highly strained, four-membered, nitrogen-containing heterocyclic compound. These compounds serve as important raw materials, intermediates, and catalysts in organic synthesis, as well as important active units in amino acids, alkaloids, and pharmaceutically active compounds. Thus, the development of an efficient and concise method to construct azetidines is of great significance in multiple disciplines. In this work, we reported on the photo-induced copper-catalyzed radical annulation of aliphatic amines with alkynes to produce azetidines. This reaction occurred in a two- or three-component manner. The alkynes efficiently captured photogenerated α-aminoalkyl radicals, forming vinyl radicals, which initiated tandem 1,5-hydrogen atom transfer and 4-exo-trig cyclization. Density functional theory calculations indicated that the tertiary radical intermediate was critical for the success of cyclization. In addition, the resulting saturated azetidine scaffolds possessed vicinal tertiary-quaternary and even quaternary-quaternary centers. Azetidines, four-membered N-heterocyclic compounds, are valuable targets for synthesis The first [3 + 1] cyclization approach is enabled by visible-light-induced copper catalysis This atom economic synthesis is characterized by double C-H activation This technology features operational simplicity, cheap catalyst, and broad substrate scope
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10
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Meyer CC, Dubey ZJ, Krische MJ. Enantioselective Iridium-Catalyzed Reductive Coupling of Dienes with Oxetanones and N-Acyl-Azetidinones Mediated by 2-Propanol. Angew Chem Int Ed Engl 2022; 61:e202115959. [PMID: 35119714 PMCID: PMC8940717 DOI: 10.1002/anie.202115959] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Indexed: 12/26/2022]
Abstract
Cyclometallated iridium-PhanePhos complexes generated in situ from [Ir(cod)Cl]2 and (R)-PhanePhos catalyze 2-propanol-mediated reductive couplings of 2-substituted dienes with oxetanone and N-acyl-azetidinones to form branched homoallylic oxetanols and azetidinols with excellent control of regio- and enantioselectivity without C-C cleavage of the strained ring via enantiotopic π-facial selection of transient allyliridium nucleophiles. This work represents the first systematic study of enantioselective additions to symmetric ketones.
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Affiliation(s)
- Cole C Meyer
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX 78712-1167, USA
| | - Zachary J Dubey
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX 78712-1167, USA
| | - Michael J Krische
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX 78712-1167, USA
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11
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Krische MJ, Meyer CC, Dubey ZJ. Enantioselective Iridium‐Catalyzed Reductive Coupling of Dienes with Oxetanones and N‐Acyl‐Azetidinones Mediated by 2‐Propanol. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Michael Joseph Krische
- University of Texas at Austin Chemistry and Biochemistry 105 E 24TH ST. STOP A5300 78712 Austin UNITED STATES
| | - Cole C. Meyer
- The University of Texas at Austin Chemistry UNITED STATES
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12
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Fu X, Zhang T, Wu J, Sun Y, Wu F. Nickel‐Catalyzed Aminofluoroalkylation of Alkenes: Access to Difluoroalkylated
N
‐Containing Heterocyclic Compounds. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaoyi Fu
- Shanghai Engineering Research Center of Green Fluoropharmaceutical Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Tianyu Zhang
- Shanghai Engineering Research Center of Green Fluoropharmaceutical Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Jingjing Wu
- Shanghai Engineering Research Center of Green Fluoropharmaceutical Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 200032 Shanghai P. R. China
| | - Yijie Sun
- Shanghai Engineering Research Center of Green Fluoropharmaceutical Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Fanhong Wu
- Shanghai Engineering Research Center of Green Fluoropharmaceutical Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
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13
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Wu B, Chen H, Gao M, Gong X, Hu L. Synthesis of 1,3-Aminoalcohols and Spirocyclic Azetidines via Tandem Hydroxymethylation and Aminomethylation Reaction of β-Keto Phosphonates with N-Nosyl- O-(2-bromoethyl)hydroxylamine. Org Lett 2021; 23:4152-4157. [PMID: 33999643 DOI: 10.1021/acs.orglett.1c01091] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
An unprecedented tandem α-hydroxymethylation and α-aminomethylation reaction of aromatic cyclic β-keto phosphonates with N-nosyl-O-(2-bromoethyl)hydroxylamine in the presence of DBU base has been developed, affording a range of 1,3-aminoalcohols in good yields. The resultant products could be flexibly transformed into the spirocyclic and bispirocyclic azetidines via one step of Mitsunobu reaction. Mechanistic study revealed that hydroxylamine in situ generated the formaldehyde and nosylamide, which in turn triggered the sequential Horner-Wadsworth-Emmons, Michael, and aldol reactions.
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Affiliation(s)
- Binyu Wu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Hongbing Chen
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Min Gao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Xiangnan Gong
- Analytical and Testing Center, Chongqing University, Chongqing 401331, China
| | - Lin Hu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
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14
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Xu P, Zhang M, Ingoglia B, Allais C, Dechert-Schmitt AMR, Singer RA, Morken JP. Construction of Azacycles by Intramolecular Amination of Organoboronates and Organobis(boronates). Org Lett 2021; 23:3379-3383. [PMID: 33852313 DOI: 10.1021/acs.orglett.1c00856] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intramolecular amination of organoboronates occurs with a 1,2-metalate shift of an aminoboron "ate" complex to form azetidines, pyrrolidines, and piperidines. Bis(boronates) undergo site-selective amination to form boronate-containing azacycles. Enantiomerically enriched azacycles are formed with high stereospecificity.
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Affiliation(s)
- Peilin Xu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Mingkai Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Bryan Ingoglia
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Christophe Allais
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | | | - Robert A Singer
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - James P Morken
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
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15
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Xu C, Yin G, Jia FC, Wu YD, Wu AX. Merging Annulation with Ring Deconstruction: Synthesis of ( E)-3-(2-Acyl-1 H-benzo[ d]imidazol-4-yl)acrylaldehyde Derivatives via I 2/FeCl 3-Promoted Dual C(sp 3)-H Amination/C-N Bond Cleavage. Org Lett 2021; 23:2559-2564. [PMID: 33739840 DOI: 10.1021/acs.orglett.1c00486] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An unprecedented I2/FeCl3-promoted cascade reaction of aryl methyl ketones with 8-aminoquinolines for the convenient synthesis of (E)-3-(2-acyl-1H-benzo[d]imidazol-4-yl)acrylaldehydes was developed by merging annulation with ring deconstruction. This novel strategy unlocked the new reactivity of 8-aminoquinolines and provided an attractive platform for the ring opening of unactivated N-heteroaromatic compounds. Preliminary mechanistic investigation suggested that dual C(sp3)-H amination/C-N bond cleavage were key reaction steps. Furthermore, late-stage modification of the obtained products successfully delivered pyrazole and isoxazole derivatives, increasing the practicability and application potential of this methodology in organic synthesis.
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Affiliation(s)
- Cheng Xu
- College of Chemistry and Chemical Engineering, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, P. R. China.,Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Guodong Yin
- College of Chemistry and Chemical Engineering, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, P. R. China
| | - Feng-Cheng Jia
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
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16
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Luque A, Paternoga J, Opatz T. Strain Release Chemistry of Photogenerated Small-Ring Intermediates. Chemistry 2021; 27:4500-4516. [PMID: 33080091 PMCID: PMC7986234 DOI: 10.1002/chem.202004178] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/16/2020] [Indexed: 12/20/2022]
Abstract
Photochemical processes, such as isomerizations and cycloadditions, have proven to be very useful in the construction of highly strained molecular frameworks. Photoinduced ring strain enables subsequent exergonic reactions which do not require the input of additional chemical energy and provides a variety of attractive synthetic options leading to complex structures. This review covers the progress achieved in the application of sequences combining excitation by ultraviolet light to form strained intermediates, which are further transformed to lower energy products in strain-release reactions. As ring strain is considerable in small ring systems, photogenerated three- and four-membered rings will be covered, mainly focusing on examples from 2000 to May 2020.
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Affiliation(s)
- Adriana Luque
- Department of ChemistryJohannes Gutenberg UniversityDuesbergweg 10–1455128MainzGermany
| | - Jan Paternoga
- Department of ChemistryJohannes Gutenberg UniversityDuesbergweg 10–1455128MainzGermany
| | - Till Opatz
- Department of ChemistryJohannes Gutenberg UniversityDuesbergweg 10–1455128MainzGermany
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17
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Xu C, Cheng R, Luo Y, Wang M, Zhang X. trans
‐Selective Aryldifluoroalkylation of Endocyclic Enecarbamates and Enamides by Nickel Catalysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008498] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Chang Xu
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Ran Cheng
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Yun‐Cheng Luo
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Ming‐Kuan Wang
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Xingang Zhang
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
- College of Chemistry Henan Institute of Advanced Technology Zhengzhou University Zhengzhou 450001 China
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18
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Xu C, Cheng R, Luo YC, Wang MK, Zhang X. trans-Selective Aryldifluoroalkylation of Endocyclic Enecarbamates and Enamides by Nickel Catalysis. Angew Chem Int Ed Engl 2020; 59:18741-18747. [PMID: 32643261 DOI: 10.1002/anie.202008498] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Indexed: 12/17/2022]
Abstract
Efficient methods for the dicarbofuntionalization of the cyclic alkenes 2-pyrroline and 2-azetine are limited. Particularly, the dicarbofunctionalization of endocyclic enecarbamates to achieve fluorinated compounds remains an unsolved issue. Reported here is a nickel-catalyzed trans-selective dicarbofunctionalization of N-Boc-2-pyrroline and N-Boc-2-azetine, a class of endocyclic enecarbamates previously unexplored for transition metal catalyzed dicarbofunctionalization. The reaction can be extended to six- and seven-membered endocyclic enamides. A variety of arylzinc reagents and bromodifluoroacetate, and its derivatives, undergo the reaction, providing straightforward and efficient access to an array of pyrrolidine- and azetidine-containing fluorinated amino acids and oligopeptides, which may have applications in the life sciences.
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Affiliation(s)
- Chang Xu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Ran Cheng
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Yun-Cheng Luo
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Ming-Kuan Wang
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Xingang Zhang
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China.,College of Chemistry, Henan Institute of Advanced Technology Zhengzhou University, Zhengzhou, 450001, China
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19
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Dubois MAJ, Smith MA, White AJP, Lee Wei Jie A, Mousseau JJ, Choi C, Bull JA. Short Synthesis of Oxetane and Azetidine 3-Aryl-3-carboxylic Acid Derivatives by Selective Furan Oxidative Cleavage. Org Lett 2020; 22:5279-5283. [PMID: 32338914 DOI: 10.1021/acs.orglett.0c01214] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Four-membered rings remain underexplored motifs despite offering attractive physicochemical properties for medicinal chemistry. Arylacetic acids bearing oxetanes, azetidines, and cyclobutanes are prepared in two steps: a catalytic Friedel-Crafts reaction from four-membered ring alcohol substrates, followed by mild oxidative cleavage. The suitability of the products as building blocks is reflected in their facile purification and amenability to derivatization. Examples include heteroaromatics and aryltriflates, as well as oxetane-derived profen drug analogues and a new endomorphin derivative containing an azetidine amino acid residue.
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Affiliation(s)
- Maryne A J Dubois
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - Milo A Smith
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - Andrew J P White
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - Alvin Lee Wei Jie
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - James J Mousseau
- Medicine Design, Pfizer Worldwide Research, Development and Medical, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Chulho Choi
- Medicine Design, Pfizer Worldwide Research, Development and Medical, Eastern Point Road, Groton, Connecticut 06340, United States
| | - James A Bull
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
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20
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Yakura T, Fujiwara T. Synthesis of Sphingosine-Related Azetidine Alkaloids, Penaresidins: Construction of Highly Substituted Azetidine Rings. HETEROCYCLES 2020. [DOI: 10.3987/rev-19-sr(f)3] [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]
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21
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Kattamuri PV, Bhakta U, Siriwongsup S, Kwon DH, Alemany LB, Yousufuddin M, Ess DH, Kürti L. Synthesis of Structurally Diverse 3-, 4-, 5-, and 6-Membered Heterocycles from Diisopropyl Iminomalonates and Soft C-Nucleophiles. J Org Chem 2019; 84:7066-7099. [PMID: 31009563 PMCID: PMC7879484 DOI: 10.1021/acs.joc.9b00681] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we present a general synthetic strategy for the preparation of 3-, 4-, 5-, and 6-membered heterocyclic unnatural amino acid derivatives by exploiting facile Mannich-type reactions between readily available N-alkyl- and N-aryl-substituted diisopropyl iminomalonates and a wide range of soft anionic C-nucleophiles without using any catalyst or additive. Fully substituted aziridines were obtained in a single step when enolates of α-bromo esters were employed as nucleophiles. Enantiomerically enriched azetidines, γ-lactones, and tetrahydroquinolines were obtained via a two-step catalytic asymmetric reduction and cyclization sequence from ketone enolate-derived adducts. Finally, highly substituted γ-lactams were prepared in one pot from adducts obtained using acetonitrile-derived carbanions. Overall, this work clearly demonstrates the utility of iminomalonates as highly versatile building blocks for the practical and scalable synthesis of structurally diverse heterocycles.
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Affiliation(s)
- Padmanabha V. Kattamuri
- Department of Chemistry, Rice University, BioScience Research Collaborative, Houston, Texas 77005, United States
| | - Urmibhusan Bhakta
- Department of Chemistry, Rice University, BioScience Research Collaborative, Houston, Texas 77005, United States
| | - Surached Siriwongsup
- Department of Chemistry, Rice University, BioScience Research Collaborative, Houston, Texas 77005, United States
| | - Doo-Hyun Kwon
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Lawrence B. Alemany
- Department of Chemistry, Rice University, BioScience Research Collaborative, Houston, Texas 77005, United States
- Shared Equipment Authority, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Muhammed Yousufuddin
- Life and Health Sciences Department, University of North Texas at Dallas, Dallas, Texas 75241, United States
| | - Daniel H. Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - László Kürti
- Department of Chemistry, Rice University, BioScience Research Collaborative, Houston, Texas 77005, United States
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22
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Dubois MAJ, Lazaridou A, Choi C, Mousseau JJ, Bull JA. Synthesis of 3-Aryl-3-Sulfanyl Azetidines by Iron-Catalyzed Thiol Alkylation with N-Cbz Azetidinols. J Org Chem 2019; 84:5943-5956. [PMID: 30973723 DOI: 10.1021/acs.joc.9b00613] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
New small-ring derivatives can provide valuable motifs in new chemical space for drug design. 3-Aryl-3-sulfanyl azetidines are synthesized directly from azetidine-3-ols in excellent yield by a mild Fe-catalyzed thiol alkylation. A broad range of thiols and azetidinols bearing electron-donating aromatics are successful, proceeding via an azetidine carbocation. The N-carboxybenzyl group is a requirement for good reactivity and enables the NH-azetidine to be revealed. Further reactions of the azetidine sulfides demonstrate their potential for incorporation in drug discovery programs.
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Affiliation(s)
- Maryne A J Dubois
- Department of Chemistry , Imperial College London, Molecular Sciences Research Hub, White City Campus , Wood Lane , London W12 0BZ , U.K
| | - Anna Lazaridou
- Department of Chemistry , Imperial College London, Molecular Sciences Research Hub, White City Campus , Wood Lane , London W12 0BZ , U.K
| | - Chulho Choi
- Pfizer Medicinal Sciences , 445 Eastern Point Road , Groton , Connecticut 06340 , United States
| | - James J Mousseau
- Pfizer Medicinal Sciences , 445 Eastern Point Road , Groton , Connecticut 06340 , United States
| | - James A Bull
- Department of Chemistry , Imperial College London, Molecular Sciences Research Hub, White City Campus , Wood Lane , London W12 0BZ , U.K
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23
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Boddy AJ, Cordier CJ, Goldberg K, Madin A, Spivey AC, Bull JA. Acid-Mediated Ring Expansion of 2,2-Disubstituted Azetidine Carbamates to 6,6-Disubstituted 1,3-Oxazinan-2-ones. Org Lett 2019; 21:1818-1822. [PMID: 30829041 DOI: 10.1021/acs.orglett.9b00407] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The ring expansion of 2-ester-2-arylazetidine carbamates can be achieved using Brønsted acids to form 6,6-disubstituted 1,3-oxazinan-2-ones. The reaction is rapid at room temperature with Boc or Cbz derivatives and proceeds with excellent yield (up to 96%) and broad substrate scope. Derivatives of drug compounds and natural products are incorporated. The combination of this ring expansion in a three-step N-H insertion/cyclization/expansion sequence is applied to directly access medicinally relevant scaffolds from acyclic precursors.
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Affiliation(s)
- Alexander J Boddy
- Department of Chemistry , Imperial College London , Molecular Sciences Research Hub, White City Campus, Wood Lane , London W12 0BZ , U.K
| | - Christopher J Cordier
- Department of Chemistry , Imperial College London , Molecular Sciences Research Hub, White City Campus, Wood Lane , London W12 0BZ , U.K
| | - Kristin Goldberg
- Medicinal Chemistry, Oncology , IMED Biotech Unit , AstraZeneca , Cambridge CB4 0WG , U.K
| | - Andrew Madin
- Hit Discovery, Discovery Sciences, IMED Biotech Unit , AstraZeneca , Cambridge CB4 0WG , U.K
| | - Alan C Spivey
- Department of Chemistry , Imperial College London , Molecular Sciences Research Hub, White City Campus, Wood Lane , London W12 0BZ , U.K
| | - James A Bull
- Department of Chemistry , Imperial College London , Molecular Sciences Research Hub, White City Campus, Wood Lane , London W12 0BZ , U.K
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24
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Qian D, Sun J. Recent Progress in Asymmetric Ion‐Pairing Catalysis with Ammonium Salts. Chemistry 2019; 25:3740-3751. [DOI: 10.1002/chem.201803752] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Deyun Qian
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong P. R. China
| | - Jianwei Sun
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong P. R. China
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25
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Bai Z, Tong H, Wang H, Chen G, He G. Synthesis of 2,3-Fused Indoline Aminals via
4 + 2 Cycloaddition of NH-free Benzazetidines with Indoles. CHINESE J CHEM 2018. [DOI: 10.1002/cjoc.201800483] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Zibo Bai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 China
| | - Huarong Tong
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 China
| | - Hao Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 China
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300071 China
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 China
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26
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Schmid SC, Guzei IA, Fernández I, Schomaker JM. Ring Expansion of Bicyclic Methyleneaziridines via Concerted, Near-Barrierless [2,3]-Stevens Rearrangements of Aziridinium Ylides. ACS Catal 2018; 8:7907-7914. [PMID: 30294503 PMCID: PMC6173328 DOI: 10.1021/acscatal.8b02206] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of densely functionalized azetidinesin a highly stereocontrolled manner is challenging, but interest in the bioactivities of these small heterocycles has stimulated methods for their preparation. We recently reported a one-carbon ring expansion of bicyclic methylene aziridines under dirhodium catalysis capable of delivering enantioenriched azetidines. This work explores this ring expansion using computational and experimental studies. DFT computations indicate that the reaction proceeds through formation of an aziridinium ylide, which is precisely poised for concerted, asynchronous ring-opening/closing to deliver the azetidines in a [2,3]-Stevens-type rearrangement. The concerted nature of this rearrangement is responsible for the stereospecificity of the reaction, where axial chirality from the initial allene substrate is transferred to the azetidine product with complete fidelity. The computed mechanistic pathway highlights the key roles of the olefin and the rigid structure of the methylene aziridine in differentiating our observed ring expansion from competing cheletropic elimination pathways noted with ylides derived from typical aziridines.
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Affiliation(s)
- Steven C. Schmid
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Ilia A. Guzei
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Israel Fernández
- Departamento de Química Organica I and Centro de Innovacioń en Química Avazanda (ORFEO−CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Jennifer M. Schomaker
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
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27
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Kolleth A, Müller S, Lumbroso A, Tanriver G, Catak S, Sulzer-Mossé S, De Mesmaeker A. Access to 3-aminobenzothiophenes and 3-aminothiophenes fused to 5-membered heteroaromatic rings through 6π-electrocyclization reaction of keteniminium salts. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.06.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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28
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Cai W, Wang S, Jalani HB, Wu J, Lu H, Li G. Oxidative Cascade Reaction of N-Aryl-3-alkylideneazetidines and Carboxylic Acids: Access to Fused Pyridines. Org Lett 2018; 20:3833-3837. [PMID: 29920103 DOI: 10.1021/acs.orglett.8b01427] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A versatile silver-promoted oxidative cascade reaction of N-aryl-3-alkylideneazetidines with carboxylic acids is reported, providing a very efficient pathway to functionalized fused pyridines. This method allows introduction of fused pyridine ring systems to heterocycles, drugs, and natural products. A mechanistic study revealed that silver salt is essential for the chemo- and regioselective ring expansion, sequential oxidative nucleophilic additions, and oxidative aromatization. This approach represents the first example of the strained N-heterocycles undergoing a cascade reaction with a π bond and a nucleophile together.
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Affiliation(s)
- Wangshui Cai
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials , School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023 , China
| | - Shuang Wang
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials , School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023 , China
| | - Hitesh B Jalani
- Department of Chemistry and Chemical Biology , Northeastern University , 360 Huntington Avenue , Boston , Massachusetts 02115 , United States
| | - Junxian Wu
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials , School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023 , China
| | - Hongjian Lu
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials , School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023 , China
| | - Guigen Li
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials , School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023 , China.,Department of Chemistry and Biochemistry , Texas Tech University , Lubbock , Texas 79409-1061 , United States
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29
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Barré B, Gonnard L, Guérinot A, Cossy J. Cobalt-Catalyzed (Hetero)arylation of Saturated Cyclic Amines with Grignard Reagents. Molecules 2018; 23:molecules23061449. [PMID: 29904007 PMCID: PMC6099817 DOI: 10.3390/molecules23061449] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 06/06/2018] [Accepted: 06/07/2018] [Indexed: 11/16/2022] Open
Abstract
(Hetero)aryl substituted saturated cyclic amines are ubiquitous scaffolds in biologically active molecules. Metal-catalyzed cross-couplings between halogeno N-heterocycles and organometallic species are efficient and modular reactions to access these attractive scaffolds. An overview of our work concerning the cobalt-catalyzed arylation of iodo-substituted cyclic amines is presented.
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Affiliation(s)
- Baptiste Barré
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI)-UMR 8231 ESPCI Paris, CNRS, PSL Research University 10, rue Vauquelin 75231 Paris CEDEX 05, France.
| | - Laurine Gonnard
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI)-UMR 8231 ESPCI Paris, CNRS, PSL Research University 10, rue Vauquelin 75231 Paris CEDEX 05, France.
| | - Amandine Guérinot
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI)-UMR 8231 ESPCI Paris, CNRS, PSL Research University 10, rue Vauquelin 75231 Paris CEDEX 05, France.
| | - Janine Cossy
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI)-UMR 8231 ESPCI Paris, CNRS, PSL Research University 10, rue Vauquelin 75231 Paris CEDEX 05, France.
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30
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Qian D, Chen M, Bissember AC, Sun J. Counterion-Induced Asymmetric Control in Ring-Opening of Azetidiniums: Facile Access to Chiral Amines. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712395] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Deyun Qian
- Shenzhen Research Institute; The Hong Kong University of Science and Technology (HKUST); Shenzhen China
- Department of Chemistry; HKUST; Clear Water Bay Kowloon Hong Kong China
| | - Min Chen
- Shenzhen Research Institute; The Hong Kong University of Science and Technology (HKUST); Shenzhen China
- Department of Chemistry; HKUST; Clear Water Bay Kowloon Hong Kong China
| | - Alex C. Bissember
- School of Natural Sciences-Chemistry; University of Tasmania; Hobart Australia
| | - Jianwei Sun
- Shenzhen Research Institute; The Hong Kong University of Science and Technology (HKUST); Shenzhen China
- Department of Chemistry; HKUST; Clear Water Bay Kowloon Hong Kong China
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31
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Qian D, Chen M, Bissember AC, Sun J. Counterion-Induced Asymmetric Control in Ring-Opening of Azetidiniums: Facile Access to Chiral Amines. Angew Chem Int Ed Engl 2018; 57:3763-3766. [DOI: 10.1002/anie.201712395] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 01/25/2018] [Indexed: 01/01/2023]
Affiliation(s)
- Deyun Qian
- Shenzhen Research Institute; The Hong Kong University of Science and Technology (HKUST); Shenzhen China
- Department of Chemistry; HKUST; Clear Water Bay Kowloon Hong Kong China
| | - Min Chen
- Shenzhen Research Institute; The Hong Kong University of Science and Technology (HKUST); Shenzhen China
- Department of Chemistry; HKUST; Clear Water Bay Kowloon Hong Kong China
| | - Alex C. Bissember
- School of Natural Sciences-Chemistry; University of Tasmania; Hobart Australia
| | - Jianwei Sun
- Shenzhen Research Institute; The Hong Kong University of Science and Technology (HKUST); Shenzhen China
- Department of Chemistry; HKUST; Clear Water Bay Kowloon Hong Kong China
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32
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Tavani C, Bianchi L, Giorgi G, Maccagno M, Petrillo G. Densely Functionalized 2-Methylideneazetidines from Nitrodienic Building Blocks. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701467] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Cinzia Tavani
- Dipartimento di Chimica e Chimica Industriale; Università di Genova; Via Dodecaneso 31 16146 Genova Italy
| | - Lara Bianchi
- Dipartimento di Chimica e Chimica Industriale; Università di Genova; Via Dodecaneso 31 16146 Genova Italy
| | - Gianluca Giorgi
- Dipartimento di Biotecnologie; Chimica e Farmacia; Università di Siena; Via A. Moro 53100 Siena Italy
| | - Massimo Maccagno
- Dipartimento di Chimica e Chimica Industriale; Università di Genova; Via Dodecaneso 31 16146 Genova Italy
| | - Giovanni Petrillo
- Dipartimento di Chimica e Chimica Industriale; Università di Genova; Via Dodecaneso 31 16146 Genova Italy
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33
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Wright K, Drouillat B, Menguy L, Marrot J, Couty F. The von Braun Reaction Applied to Azetidines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701443] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Karen Wright
- Institut Lavoisier de Versailles; UMR 8180; Université de Versailles St-Quentin-en-Yvelines; Université Paris Saclay; 45 av. des Etats-Unis 78035 Versailles Cedex France
| | - Bruno Drouillat
- Institut Lavoisier de Versailles; UMR 8180; Université de Versailles St-Quentin-en-Yvelines; Université Paris Saclay; 45 av. des Etats-Unis 78035 Versailles Cedex France
| | - Laurence Menguy
- Institut Lavoisier de Versailles; UMR 8180; Université de Versailles St-Quentin-en-Yvelines; Université Paris Saclay; 45 av. des Etats-Unis 78035 Versailles Cedex France
| | - Jérôme Marrot
- Institut Lavoisier de Versailles; UMR 8180; Université de Versailles St-Quentin-en-Yvelines; Université Paris Saclay; 45 av. des Etats-Unis 78035 Versailles Cedex France
| | - François Couty
- Institut Lavoisier de Versailles; UMR 8180; Université de Versailles St-Quentin-en-Yvelines; Université Paris Saclay; 45 av. des Etats-Unis 78035 Versailles Cedex France
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34
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Grellepois F, Ben Jamaa A, Saraiva Rosa N. α-Trifluoromethylated tertiary homoallylic amines: diastereoselective synthesis and conversion into β-aminoesters, γ- and δ-aminoalcohols, azetidines and pyrrolidines. Org Biomol Chem 2017; 15:9696-9709. [PMID: 29125173 DOI: 10.1039/c7ob02506h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The diastereoselective addition of allyl zinc and allylindium derivatives to α-trifluoromethyl N-tert-butanesulfinyl hemiaminals, bench stable precursors of aryl and alkyl trifluoromethyl ketimines, allows the synthesis of homoallylic amines containing a tetrasubstituted carbon stereocentre bearing a trifluoromethyl group with good diastereoselectivities (up to dr > 99 : 1). This approach was also suitable for accessing chiral homoallylic amines bearing two contiguous stereocenters. The synthetic usefulness of N-tert-butanesulfinyl homoallylamines was illustrated by preparing various trifluoromethylated nitrogen containing bifunctional synthons (aminoesters, aminoalcohols) and small azaheterocycles (azetidines, pyrrolidines).
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Affiliation(s)
- Fabienne Grellepois
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR des Sciences Exactes et Naturelles, BP 1039, 51687 Reims Cedex 2, France.
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35
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Schmid SC, Guzei IA, Schomaker JM. A Stereoselective [3+1] Ring Expansion for the Synthesis of Highly Substituted Methylene Azetidines. Angew Chem Int Ed Engl 2017; 56:12229-12233. [PMID: 28834110 PMCID: PMC5693379 DOI: 10.1002/anie.201705202] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Indexed: 01/08/2023]
Abstract
The reaction of rhodium-bound carbenes with strained bicyclic methylene aziridines results in a formal [3+1] ring expansion to yield highly substituted methylene azetidines with excellent regio- and stereoselectivity. The reaction appears to proceed through an ylide-type mechanism, where the unique strain and structure of the methylene aziridine promotes a ring-opening/ring-closing cascade that efficiently transfers chirality from substrate to product. The resultant products can be elaborated into new azetidine scaffolds containing vicinal tertiary-quaternary and even quaternary-quaternary stereocenters.
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Affiliation(s)
- Steven C Schmid
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Ilia A Guzei
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Jennifer M Schomaker
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
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36
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Schmid SC, Guzei IA, Schomaker JM. A Stereoselective [3+1] Ring Expansion for the Synthesis of Highly Substituted Methylene Azetidines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705202] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Steven C. Schmid
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53706 USA
| | - Ilia A. Guzei
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53706 USA
| | - Jennifer M. Schomaker
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53706 USA
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37
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Reidl TW, Son J, Wink DJ, Anderson LL. Facile Synthesis of Azetidine Nitrones and Diastereoselective Conversion into Densely Substituted Azetidines. Angew Chem Int Ed Engl 2017; 56:11579-11583. [PMID: 28707372 DOI: 10.1002/anie.201705681] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 07/12/2017] [Indexed: 11/06/2022]
Abstract
An electrocyclization route to azetidine nitrones from N-alkenylnitrones was discovered that provides facile access to these unsaturated strained heterocycles. Reactivity studies showed that these compounds undergo a variety of reduction, cycloaddition, and nucleophilic addition reactions to form highly substituted azetidines with excellent diastereoselectivity. Taken together, these transformations provide a fundamentally different approach to azetidine synthesis than traditional cyclization by nucleophilic displacement and provide novel access to a variety of underexplored strained heterocyclic compounds.
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Affiliation(s)
- Tyler W Reidl
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
| | - Jongwoo Son
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
| | - Donald J Wink
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
| | - Laura L Anderson
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL, USA
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38
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Reidl TW, Son J, Wink DJ, Anderson LL. Facile Synthesis of Azetidine Nitrones and Diastereoselective Conversion into Densely Substituted Azetidines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705681] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Tyler W. Reidl
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
| | - Jongwoo Son
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
| | - Donald J. Wink
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
| | - Laura L. Anderson
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago IL USA
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39
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Daniel PE, Weber AE, Malcolmson SJ. Umpolung Synthesis of 1,3-Amino Alcohols: Stereoselective Addition of 2-Azaallyl Anions to Epoxides. Org Lett 2017; 19:3490-3493. [PMID: 28656772 DOI: 10.1021/acs.orglett.7b01471] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We report the direct preparation of 1,3-amino alcohols that contain up to three contiguous stereogenic centers by the umpolung coupling of imines and epoxides. Nucleophilic 2-azaallyl anions, generated from imines, are stereoselectively added to epoxides to furnish 1,3-amino alcohols after hydrolysis of the product imine. Transformations afford amino alcohols with >98% site selectivity with respect to both reaction partners and in up to >98% yield and >20:1 dr.
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Affiliation(s)
- Paige E Daniel
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Alexandria E Weber
- 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
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40
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Rajkumar S, Clarkson GJ, Shipman M. Regio- and Stereocontrolled Synthesis of 3-Substituted 1,2-Diazetidines by Asymmetric Allylic Amination of Vinyl Epoxide. Org Lett 2017; 19:2058-2061. [PMID: 28375013 DOI: 10.1021/acs.orglett.7b00653] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pd-catalyzed asymmetric allylic amination of rac-vinyl epoxide with unsymmetrical 1,2-hydrazines proceeds with excellent regio- and stereocontrol, which after further ring closure provides differentially protected 3-vinyl-1,2-diazetidines in good yields. The chirality at C-3 exerts stereocontrol over the nitrogen centers in the 1,2-diazetidine with all substituents orientating themselves trans to their neighbors. Efficient functionalization without rupture of the strained ring is demonstrated (e.g., by cross-metathesis), establishing the first general route to C-3-substituted 1,2-diazetidines in enantioenriched form.
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Affiliation(s)
- Sundaram Rajkumar
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Guy J Clarkson
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Michael Shipman
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
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41
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Mehra V, Lumb I, Anand A, Kumar V. Recent advances in synthetic facets of immensely reactive azetidines. RSC Adv 2017. [DOI: 10.1039/c7ra08884a] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Recent developments in synthetic strategies towards functionalized azetidines along with their versatility as heterocyclic synthons.
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Affiliation(s)
- Vishu Mehra
- Department of Chemistry
- Hindu College
- Amritsar-143005
- India
| | - Isha Lumb
- Department of Chemistry
- Baring Union Christian College
- Batala-143505
- India
| | - Amit Anand
- Department of Chemistry
- Khalsa College
- Amritsar-143005
- India
| | - Vipan Kumar
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar-143005
- India
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42
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Hazelard D, Compain P. Square sugars: challenges and synthetic strategies. Org Biomol Chem 2017; 15:3806-3827. [DOI: 10.1039/c7ob00386b] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The synthesis of square sugars requires innovative strategies based on efficient stereoselective methodologies, from organocatalysis to metal carbene insertion.
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Affiliation(s)
- Damien Hazelard
- Laboratoire de Synthèse Organique et Molécules Bioactives (SYBIO)
- Université de Strasbourg/CNRS (UMR 7509)
- Ecole Europèenne de Chimie, Polyméres et Matériaux (ECPM)
- 25 rue Becquerel
- France
| | - Philippe Compain
- Laboratoire de Synthèse Organique et Molécules Bioactives (SYBIO)
- Université de Strasbourg/CNRS (UMR 7509)
- Ecole Europèenne de Chimie, Polyméres et Matériaux (ECPM)
- 25 rue Becquerel
- France
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43
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Marcantoni E, Petrini M. Recent Developments in the Stereoselective Synthesis of Nitrogen-Containing Heterocycles usingN-Acylimines as Reactive Substrates. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600644] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Enrico Marcantoni
- School of Science and Technology; Chemistry Division; Università di Camerino; via S. Agostino 1 62032 Camerino Italy
| | - Marino Petrini
- School of Science and Technology; Chemistry Division; Università di Camerino; via S. Agostino 1 62032 Camerino Italy
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44
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Börjesson M, Westman G. Branching of hemicelluloses through an azetidinium salt ring-opening reaction. Carbohydr Res 2016; 428:23-30. [DOI: 10.1016/j.carres.2016.04.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 04/04/2016] [Accepted: 04/06/2016] [Indexed: 11/28/2022]
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45
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Liu C, Achtenhagen M, Szostak M. Chemoselective Ketone Synthesis by the Addition of Organometallics to N-Acylazetidines. Org Lett 2016; 18:2375-8. [DOI: 10.1021/acs.orglett.6b00842] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Chengwei Liu
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Marcel Achtenhagen
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Michal Szostak
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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46
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Dowling MS, Fernando DP, Hou J, Liu B, Smith AC. Two Scalable Syntheses of (S)-2-Methylazetidine. J Org Chem 2016; 81:3031-6. [PMID: 26895201 DOI: 10.1021/acs.joc.6b00149] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Two orthogonal routes for preparing (S)-2-methylazetidine as a bench stable, crystalline (R)-(-)-CSA salt are presented. One route features the in situ generation and cyclization of a 1,3-bis-triflate to form the azetidine ring, while the second route involves chemoselective reduction of N-Boc azetidine-2-carboxylic acid. Both sequences afford the desired product in good overall yields (61% and 49%) and high enantiomeric excess (>99% ee), avoid column chromatography, and are suitable for the large-scale production of this material.
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Affiliation(s)
- Matthew S Dowling
- Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Dilinie P Fernando
- Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Jie Hou
- WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Bo Liu
- WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China
| | - Aaron C Smith
- Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
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47
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Quinodoz P, Drouillat B, Wright K, Marrot J, Couty F. N-Arylazetidines: Preparation through Anionic Ring Closure. J Org Chem 2016; 81:2899-910. [DOI: 10.1021/acs.joc.6b00169] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pierre Quinodoz
- Institut Lavoisier de Versailles,
UMR 8180. Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay, 45, Avenue des Etats-Unis, Versailles 78035 Cedex, France
| | - Bruno Drouillat
- Institut Lavoisier de Versailles,
UMR 8180. Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay, 45, Avenue des Etats-Unis, Versailles 78035 Cedex, France
| | - Karen Wright
- Institut Lavoisier de Versailles,
UMR 8180. Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay, 45, Avenue des Etats-Unis, Versailles 78035 Cedex, France
| | - Jérôme Marrot
- Institut Lavoisier de Versailles,
UMR 8180. Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay, 45, Avenue des Etats-Unis, Versailles 78035 Cedex, France
| | - François Couty
- Institut Lavoisier de Versailles,
UMR 8180. Université de Versailles St-Quentin-en-Yvelines, Université Paris Saclay, 45, Avenue des Etats-Unis, Versailles 78035 Cedex, France
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48
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Lugiņina J, Uzuleņa J, Posevins D, Turks M. Ring-Opening of Carbamate-Protected Aziridines and Azetidines in Liquid Sulfur Dioxide. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600141] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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49
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Jin HS, Sun R, Zhou W, Zhao LM. Diastereoselective synthesis of 3,3-dimethylazetidines via an intramolecular iodine-mediated cyclization reaction. RSC Adv 2016. [DOI: 10.1039/c5ra21872a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
An iodine-mediated intramolecular cyclization reaction of γ-prenylated amines has been developed to provide a convenient route to 3,3-dimethylazetidines.
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Affiliation(s)
- Hai-Shan Jin
- School of Chemistry and Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- China
| | - Rui Sun
- School of Chemistry and Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- China
| | - Wei Zhou
- School of Chemistry and Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- China
| | - Li-Ming Zhao
- School of Chemistry and Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- China
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50
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Meyer F. Trifluoromethyl nitrogen heterocycles: synthetic aspects and potential biological targets. Chem Commun (Camb) 2016; 52:3077-94. [DOI: 10.1039/c5cc09414c] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The synthetic methodologies and the potential biological targets of α-trifluoromethylated nitrogen heterocycles are presented.
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Affiliation(s)
- F. Meyer
- Laboratory of Biopolymers and Supramolecular Nanomaterials
- Faculty of Pharmacy
- Université Libre de Bruxelles (ULB)
- 1050 Bruxelles
- Belgium
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