1
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Biosca M, Szabó KJ, Himo F. Mechanism of Asymmetric Homologation of Alkenylboronic Acids with CF 3-Diazomethane via Borotropic Rearrangement. J Org Chem 2024; 89:4538-4548. [PMID: 38527364 PMCID: PMC11002940 DOI: 10.1021/acs.joc.3c02785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/23/2024] [Accepted: 03/04/2024] [Indexed: 03/27/2024]
Abstract
Density functional theory calculations have been performed to investigate the mechanism for the BINOL-catalyzed asymmetric homologation of alkenylboronic acids with CF3-diazomethane. The reaction proceeds via a chiral BINOL ester of the alkenylboronic acid substrate. The calculations reveal a complex scenario for the formation of the chiral BINOL-alkenylboronate species, which is the key intermediate in the catalytic process. The aliphatic alcohol additive plays an important role in the reaction. This study provides a rationalization of the stereoinduction step of the reaction, and the enantioselectivity is mainly attributed to the steric repulsion between the CF3 group of the diazomethane reagent and the γ-substituent of the BINOL catalyst. The complex potential energy surface obtained by the calculations is analyzed by means of microkinetic simulations.
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Affiliation(s)
| | - Kálmán J. Szabó
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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2
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Deliaval M, Jayarajan R, Eriksson L, Szabó KJ. Three-Component Approach to Densely Functionalized Trifluoromethyl Allenols by Asymmetric Organocatalysis. J Am Chem Soc 2023; 145:10001-10006. [PMID: 37126044 PMCID: PMC10176480 DOI: 10.1021/jacs.3c02852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We have developed a new three-component catalytic coupling reaction of alkynyl boronates, diazomethanes, and aliphatic/aromatic ketones in the presence of BINOL derivatives. The reaction proceeds with a remarkably high enantio- and diastereoselectivity (up to three contiguous stereocenters) affording tertiary CF3-allenols in a single operational step. The reaction proceeds under mild, neutral, metal-free conditions, which leads to a high level of functional group tolerance.
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Affiliation(s)
- Marie Deliaval
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Ramasamy Jayarajan
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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3
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Wang Q, Eriksson L, Szabó KJ. Catalytic Homologation‐Allylboration Sequence for Diastereo‐ and Enantioselective Synthesis of Densely Functionalized β‐Fluorohydrins with Tertiary Fluoride Stereocenters. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202301481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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4
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Wang Q, Nilsson T, Eriksson L, Szabó KJ. Sulfenofunctionalization of Chiral α-Trifluoromethyl Allylboronic Acids: Asymmetric Synthesis of SCF 3 , SCF 2 R, SCN and SAr Compounds. Angew Chem Int Ed Engl 2022; 61:e202210509. [PMID: 36152310 PMCID: PMC9828052 DOI: 10.1002/anie.202210509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Indexed: 01/12/2023]
Abstract
We report herein a new method for the synthesis of densely functionalized chiral allyl SCF3 , SCF2 R, SCN and SAr species with a separate CF3 functionality. The synthetic approach is based on selenium-catalyzed sulfenofunctionalization of chiral α-CF3 allylboronic acids. The reactions proceeded with remarkably high stereo-, diastereo- and site-selectivity, based on the formation of a stable thiiranium ion followed by rapid deborylative ring opening.
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Affiliation(s)
- Qiang Wang
- Department of Organic ChemistryStockholm UniversitySE-10691StockholmSweden
| | - Tomas Nilsson
- Department of Organic ChemistryStockholm UniversitySE-10691StockholmSweden
| | - Lars Eriksson
- Department of Materials and Environmental ChemistryStockholm UniversitySE-10691StockholmSweden
| | - Kálmán J. Szabó
- Department of Organic ChemistryStockholm UniversitySE-10691StockholmSweden
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5
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Jayarajan R, Kireilis T, Eriksson L, Szabó KJ. Asymmetric Organocatalytic Homologation: Access to Diverse Chiral Trifluoromethyl Organoboron Species. Chemistry 2022; 28:e202202059. [PMID: 35980871 DOI: 10.1002/chem.202202059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Indexed: 01/07/2023]
Abstract
A broad range of aliphatic, aromatic, and heterocyclic boronic acids were successfully homologated using trifluorodiazoethane in the presence of BINOL derivatives to provide the corresponding chiral trifluoromethyl containing boronic acid derivatives in high yields and excellent enantioselectivity. The in situ conversion of the chiral transient boronic acids to the corresponding alcohols or β-CF3 carboxylates are also demonstrated.
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Affiliation(s)
- Ramasamy Jayarajan
- Department of Organic Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Tautvydas Kireilis
- Department of Organic Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry, Stockholm University, SE106 91, Stockholm, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden
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6
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Wang Q, Biosca M, Himo F, Szabó KJ. Electrophilic Fluorination of Alkenes via Bora‐Wagner–Meerwein Rearrangement. Access to β‐Difluoroalkyl Boronates. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Qiang Wang
- Department of Organic Chemistry Stockholm University Sweden
| | - Maria Biosca
- Department of Organic Chemistry Stockholm University Sweden
| | - Fahmi Himo
- Department of Organic Chemistry Stockholm University Sweden
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7
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Wang Q, Biosca M, Himo F, Szabó KJ. Electrophilic Fluorination of Alkenes via Bora-Wagner-Meerwein Rearrangement. Access to β-Difluoroalkyl Boronates. Angew Chem Int Ed Engl 2021; 60:26327-26331. [PMID: 34613633 PMCID: PMC9299629 DOI: 10.1002/anie.202109461] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/06/2021] [Indexed: 01/26/2023]
Abstract
The electrophilic fluorination of geminal alkyl substituted vinyl‐Bmida derivatives proceeds via bora‐Wagner–Meerwein rearrangement. According to DFT modelling studies this rearrangement occurs with a low activation barrier via a bora‐cyclopropane shaped TS. The Bmida group has a larger migration aptitude than the alkyl moiety in the Wagner–Meerwein rearrangement of the presented electrophilic fluorination reactions.
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Affiliation(s)
- Qiang Wang
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Maria Biosca
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, Sweden
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8
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Meyer DN, Cortés González MA, Jiang X, Johansson-Holm L, Pourghasemi Lati M, Elgland M, Nordeman P, Antoni G, Szabó KJ. Base-catalysed 18F-labelling of trifluoromethyl ketones. Application to the synthesis of 18F-labelled neutrophil elastase inhibitors. Chem Commun (Camb) 2021; 57:8476-8479. [PMID: 34346419 DOI: 10.1039/d1cc03624f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A new method for the fluorine-18 labelling of trifluoromethyl ketones has been developed. This method is based on the conversion of a-COCF3 functional group to a difluoro enol silyl ether followed by halogenation and fluorine-18 labelling. The utility of this new method was demonstrated by the synthesis of fluorine-18 labelled neutrophil elastase inhibitors, which are potentially useful for detection of inflammatory disorders.
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Affiliation(s)
- Denise N Meyer
- Department of Organic Chemistry, Stockholm University, SE-106 91, Sweden.
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9
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Szabó KJ, Lübcke M. Diazocarbonyl Compounds in Organofluorine Chemistry. Synlett 2021. [DOI: 10.1055/a-1297-6902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractDiazocarbonyl compounds are useful substrates in di- and trifunctionalization reactions based on F/CF3/SCF3 introduction. In the presented reactions, various electrophilic F/CF3/SCF3-transfer reagents were used. The majority of the reactions were based on rhodium catalysis and the application of various oxygen nucleophiles, such as alcohols, cyclic/acyclic ethers, and carboxylic acids. The oxyfluorination reactions were further developed to provide a new fluorine-18 labeling method. Density functional theory (DFT) modeling studies were performed to get a deeper mechanistic understanding of these reactions. These DFT modeling studies indicated that the catalytic reactions proceed through formation of rhodium carbene and oxonium ylide intermediates. The oxonium ylides undergo tautomerization to enol ether type species that subsequently react with the electrophilic F/CF3/SCF3-transfer reagents. We
also present an arylation–trifluoromethylthiolation reaction for simultaneous introduction of C–SCF3 and C–C bonds into diazocarbonyl compounds. This reaction does not proceed by rhodium catalysis, but follows a Hooz-type mechanism.1 Introduction2 Diazocarbonyl Compounds: Versatile Substrates in Organic Synthesis3 Fluorination, Trifluoromethylation, and Trifluoromethylthiolation of Diazo Substrates3.1 Metal-Free Reactions3.2 Metal-Catalyzed Reactions with Nucleophilic Reagents3.3 Metal-Catalyzed Reactions with Electrophilic Reagents4 Oxyfluorination Reactions4.1 Fluorobenziodoxole as a Fluorine Source4.2 [18F]Fluorobenziodoxole as a Fluorine Source for Radiolabeling4.3 Oxyfluorination with NFSI5 Oxytrifluoromethylation6 Oxytrifluoromethylthiolation7 Arylation–Trifluoromethylthiolation Reaction8 Conclusions and Outlook
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Affiliation(s)
- Kálmán J. Szabó
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University
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10
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Jonker SJT, Jayarajan R, Kireilis T, Deliaval M, Eriksson L, Szabó KJ. Organocatalytic Synthesis of α-Trifluoromethyl Allylboronic Acids by Enantioselective 1,2-Borotropic Migration. J Am Chem Soc 2020; 142:21254-21259. [PMID: 33270462 PMCID: PMC7760092 DOI: 10.1021/jacs.0c09923] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
![]()
Chiral α-substituted allylboronic
acids were synthesized
by asymmetric homologation of alkenylboronic acids using CF3/TMS-diazomethanes in the presence of BINOL catalyst and ethanol.
The chiral α-substituted allylboronic acids were reacted with
aldehydes or oxidized to alcohols in situ with a high degree of chirality
transfer. The oxygen-sensitive allylboronic acids can be purified
via their isolated diaminonaphthalene (DanH)-protected derivatives.
The highly reactive purified allylboronic acids reacted in a self-catalyzed
reaction at room temperature with ketones, imines, and indoles to
give congested trifluoromethylated homoallylic alcohols/amines with
up to three contiguous stereocenters.
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Affiliation(s)
- Sybrand J T Jonker
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Ramasamy Jayarajan
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Tautvydas Kireilis
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Marie Deliaval
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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11
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Wang Q, Lübcke M, Biosca M, Hedberg M, Eriksson L, Himo F, Szabó KJ. Enantioselective Construction of Tertiary Fluoride Stereocenters by Organocatalytic Fluorocyclization. J Am Chem Soc 2020; 142:20048-20057. [PMID: 33191747 PMCID: PMC7735711 DOI: 10.1021/jacs.0c09323] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
![]()
1,1-Disubstituted styrenes with internal
oxygen and nitrogen nucleophiles
undergo oxidative fluorocyclization reactions with in situ generated chiral iodine(III)-catalysts. The resulting fluorinated
tetrahydrofurans and pyrrolidines contain a tertiary carbon–fluorine
stereocenter. Application of a new 1-naphthyllactic acid-based iodine(III)-catalyst
allows the control of tertiary carbon–fluorine stereocenters
with up to 96% ee. Density functional theory calculations are performed
to investigate the details of the mechanism and the factors governing
the stereoselectivity of the reaction.
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Affiliation(s)
- Qiang Wang
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Marvin Lübcke
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Maria Biosca
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Martin Hedberg
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
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12
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Jiang X, Meyer D, Baran D, Cortés González MA, Szabó KJ. Trifluoromethylthiolation, Trifluoromethylation, and Arylation Reactions of Difluoro Enol Silyl Ethers. J Org Chem 2020; 85:8311-8319. [PMID: 32441100 PMCID: PMC7339110 DOI: 10.1021/acs.joc.0c01030] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
![]()
This study reports a new application
area of difluoro enol silyl
ethers, which can be easily obtained from trifluoromethyl ketones.
The main focus has been directed to the electrophilic fluoroalkylation
and arylation methods. The trifluoromethylthiolation of difluoro enol
silyl ethers can be used for the construction of a novel trifluoromethylthio-α,α-difluoroketone
(−COCF2SCF3) functionality. The −CF2SCF3 moiety has interesting properties due to the
electron-withdrawing, albeit lipophilic, character of the SCF3 group, which can be combined with the high electrophilicity
of the difluoroketone motif. The methodology could also be extended
to difluoro homologation of the trifluoromethyl ketones using the
Togni reagent. In addition, we presented a method for transition-metal-free
arylation of difluoro enol silyl ethers based on hypervalent iodines.
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Affiliation(s)
- Xingguo Jiang
- Department of Organic Chemistry, Stockholm University, Stockholm SE-106 91, Sweden
| | - Denise Meyer
- Department of Organic Chemistry, Stockholm University, Stockholm SE-106 91, Sweden
| | - Dominik Baran
- Department of Organic Chemistry, Stockholm University, Stockholm SE-106 91, Sweden
| | | | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, Stockholm SE-106 91, Sweden
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13
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Lübcke M, Bezhan D, Szabó KJ. Trifluoromethylthiolation-arylation of diazocarbonyl compounds by modified Hooz multicomponent coupling. Chem Sci 2019; 10:5990-5995. [PMID: 31360406 PMCID: PMC6571710 DOI: 10.1039/c9sc00829b] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 05/03/2019] [Indexed: 01/28/2023] Open
Abstract
Multicomponent reaction of diazocarbonyl and dibenzenesulfonimide-SCF3 reagents with BAr4 salts in the presence of Zn(NTf2)2 gives α,α′-difunctionalized trifluoromethylthio compounds.
A new Zn-mediated trifluoromethylthiolation-based bifunctionalization reaction is developed. In this process, simultaneous C–SCF3 and C–C bond formation takes place in a multicomponent reaction, in which an aryl and a SCF3 group arise from different reagents. Our studies show that the reaction mechanism is similar to the Hooz multicomponent coupling. The process involves in situ generation of BAr3, which reacts with a diazocarbonyl compound, and the reaction is terminated by an electrophilic SCF3 transfer. The reaction can also be extended to fluorination based bifunctionalization which proceeds with somewhat lower yield than the analogous trifluoromethylthiolation reaction.
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Affiliation(s)
- Marvin Lübcke
- Department of Organic Chemistry , Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Dina Bezhan
- Department of Organic Chemistry , Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Kálmán J Szabó
- Department of Organic Chemistry , Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden .
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14
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Cortés González MA, Jiang X, Nordeman P, Antoni G, Szabó KJ. Rhodium-mediated 18F-oxyfluorination of diazoketones using a fluorine-18-containing hypervalent iodine reagent. Chem Commun (Camb) 2019; 55:13358-13361. [PMID: 31625541 DOI: 10.1039/c9cc06905d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
α-[18F]Fluoro ethers were obtained from diazocarbonyl compounds using a hypervalent iodine based fluorine-18 reagent.
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Affiliation(s)
| | - Xingguo Jiang
- Department of Organic Chemistry
- Stockholm University
- Sweden
| | | | - Gunnar Antoni
- Department of Medicinal Chemistry
- Uppsala University
- Sweden
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15
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Mai BK, Szabó KJ, Himo F. Mechanisms of Rh-Catalyzed Oxyaminofluorination and Oxyaminotrifluoromethylthiolation of Diazocarbonyl Compounds with Electrophilic Reagents. Org Lett 2018; 20:6646-6649. [DOI: 10.1021/acs.orglett.8b02628] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Binh Khanh Mai
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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16
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Wang D, de Wit MJM, Szabó KJ. Synthesis of Densely Substituted Conjugated Dienes by Transition-Metal-Free Reductive Coupling of Allenylboronic Acids and Tosylhydrazones. J Org Chem 2018; 83:8786-8792. [DOI: 10.1021/acs.joc.8b01104] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Dong Wang
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Martin J. M. de Wit
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
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17
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Mai BK, Szabó KJ, Himo F. Mechanisms of Rh-Catalyzed Oxyfluorination and Oxytrifluoromethylation of Diazocarbonyl Compounds with Hypervalent Fluoroiodine. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00667] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Binh Khanh Mai
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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18
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Zhao J, Jonker SJT, Meyer DN, Schulz G, Tran CD, Eriksson L, Szabó KJ. Copper-catalyzed synthesis of allenylboronic acids. Access to sterically encumbered homopropargylic alcohols and amines by propargylboration. Chem Sci 2018; 9:3305-3312. [PMID: 29732108 PMCID: PMC5915797 DOI: 10.1039/c7sc05123a] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 02/17/2018] [Indexed: 12/21/2022] Open
Abstract
Tri- and tetrasubstituted allenylboronic acids were prepared via a new versatile copper-catalyzed methodology. The densely functionalized allenylboronic acids readily undergo propargylboration reactions with ketones and imines without any additives. Catalytic asymmetric propargylborylation of ketones is demonstrated with high stereoselectivity allowing for the synthesis of highly enantioenriched tertiary homopropargyl alcohols. The reaction is suitable for kinetic resolution of racemic allenylboronic acids affording alkynes with adjacent quaternary stereocenters.
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Affiliation(s)
- Jian Zhao
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Sybrand J T Jonker
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Denise N Meyer
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Göran Schulz
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - C Duc Tran
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry , Stockholm University , SE-106 91 Stockholm , Sweden .
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19
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Cortés González MA, Nordeman P, Bermejo Gómez A, Meyer DN, Antoni G, Schou M, Szabó KJ. [18F]fluoro-benziodoxole: a no-carrier-added electrophilic fluorinating reagent. Rapid, simple radiosynthesis, purification and application for fluorine-18 labelling. Chem Commun (Camb) 2018; 54:4286-4289. [DOI: 10.1039/c8cc00526e] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An electrophilic 18F transfer reagent was synthetized by rapid, operationally simple ligand exchange from a hypervalent iodine and [18F]TBAF.
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Affiliation(s)
| | | | - Antonio Bermejo Gómez
- Department of Organic Chemistry
- Stockholm University
- Sweden
- AstraZeneca PET Centre at Karolinska Institutet
- Stockholm
| | | | - Gunnar Antoni
- Department of Medicinal Chemistry
- Uppsala University
- Sweden
| | - Magnus Schou
- AstraZeneca PET Centre at Karolinska Institutet
- Stockholm
- Sweden
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20
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Jonker SJT, Diner C, Schulz G, Iwamoto H, Eriksson L, Szabó KJ. Catalytic asymmetric propargyl- and allylboration of hydrazonoesters: a metal-free approach to sterically encumbered chiral α-amino acid derivatives. Chem Commun (Camb) 2018; 54:12852-12855. [DOI: 10.1039/c8cc07908k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Metal-free asymmetric catalysis for the synthesis of sterically encumbered amino-acids was developed using allyl- and allenylboronic acid reagents.
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Affiliation(s)
| | - Colin Diner
- Department of Organic Chemistry
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Göran Schulz
- Department of Organic Chemistry
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Hiroaki Iwamoto
- Department of Organic Chemistry
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry
- Stockholm University
- SE-106 91 Stockholm
- Sweden
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21
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Abstract
This communication describes an efficient palladium pincer complex-catalyzed allylic C-H borylation of alkenes. The transformation exhibits high regio- and stereoselectivity with a variety of linear alkenes. A synthetically useful feature of this allylic C-H borylation method is that all allyl-Bpin products can be isolated in usually high yields. Preliminary mechanistic studies indicate that this C-H borylation reaction proceeds via Pd(IV) pincer complex intermediates.
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Affiliation(s)
- Lujia Mao
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Rüdiger Bertermann
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Simon G Rachor
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Kálmán J Szabó
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University , SE-10691 Stockholm, Sweden
| | - Todd B Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
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22
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Mao L, Bertermann R, Emmert K, Szabó KJ, Marder TB. Synthesis of Vinyl-, Allyl-, and 2-Boryl Allylboronates via a Highly Selective Copper-Catalyzed Borylation of Propargylic Alcohols. Org Lett 2017; 19:6586-6589. [DOI: 10.1021/acs.orglett.7b03294] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Lujia Mao
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, 97074 Würzburg, Germany
| | - Rüdiger Bertermann
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, 97074 Würzburg, Germany
| | - Katharina Emmert
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, 97074 Würzburg, Germany
| | - Kálmán J. Szabó
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Todd B. Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, 97074 Würzburg, Germany
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23
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Abstract
Density functional theory calculations have been performed to investigate the binaphthol-catalyzed allylboration of skatoles. The high stereoselectivity observed for the reaction is reproduced well by the calculations and was found to be mainly a result of steric repulsions in the corresponding Zimmerman-Traxler transition states. The role of the additive MeOH in enhancing the stereoselectivity was also investigated and is suggested to promote the formation of less reactive allylboronic ester intermediates, thereby suppressing the formation of allylboroxine species, which undergo the facile racemic background reaction.
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Affiliation(s)
- Genping Huang
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University , Tianjin 300072, P. R. China
| | - Colin Diner
- Department of Organic Chemistry, Stockholm University , SE-106 91 Stockholm, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University , SE-106 91 Stockholm, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry, Stockholm University , SE-106 91 Stockholm, Sweden
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24
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Affiliation(s)
- Marvin Lübcke
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
- Stockholm Brain Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Weiming Yuan
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
- Stockholm Brain Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden
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25
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Affiliation(s)
- Dong Wang
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
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26
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Affiliation(s)
- Lujia Mao
- Institut für Anorganische Chemie, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Kálmán J. Szabó
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Todd B. Marder
- Institut für Anorganische Chemie, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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27
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Ilchenko NO, Hedberg M, Szabó KJ. Fluorinative ring-opening of cyclopropanes by hypervalent iodine reagents. An efficient method for 1,3-oxyfluorination and 1,3-difluorination. Chem Sci 2017; 8:1056-1061. [PMID: 28451244 PMCID: PMC5356504 DOI: 10.1039/c6sc03471c] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 09/15/2016] [Indexed: 12/20/2022] Open
Abstract
A new method is presented for 1,3-difluorination and 1,3-oxyfluorination reactions. The process is based on iodonium mediated opening of 1,1-disubstituted cyclopropanes. The reaction proceeds with high chemo- and regioselectivity under mild reaction conditions typically at room temperature in a couple of hours. The reaction probably occurs via electrophilic ring-opening of cyclopropanes.
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Affiliation(s)
- Nadia O Ilchenko
- Stockholm University , Arrhenius Laboratory , Department of Organic Chemistry , SE-106 91 Stockholm , Sweden .
| | - Martin Hedberg
- Stockholm University , Arrhenius Laboratory , Department of Organic Chemistry , SE-106 91 Stockholm , Sweden .
| | - Kálmán J Szabó
- Stockholm University , Arrhenius Laboratory , Department of Organic Chemistry , SE-106 91 Stockholm , Sweden .
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28
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Bermejo Góme A, González MAC, Lübcke M, Johansson MJ, Schou M, Szabó KJ. Synthesis of trifluoromethyl moieties by late-stage copper (I) mediated nucleophilic fluorination. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2016.12.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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29
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Affiliation(s)
- Jiji Zhang
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
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30
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Affiliation(s)
- Colin Diner
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
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31
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Gómez AB, Cortés González MA, Lübcke M, Johansson MJ, Halldin C, Szabó KJ, Schou M. Efficient DBU accelerated synthesis of 18F-labelled trifluoroacetamides. Chem Commun (Camb) 2016; 52:13963-13966. [PMID: 27844069 DOI: 10.1039/c6cc08535k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Nucleophilic 18F-fluorination of bromodifluoromethyl derivatives was performed using [18F]Bu4NF in the presence of DBU (1,8-diazabicyclo[5.4.0]undec-7-ene). This novel procedure provided a diverse set of [18F]trifluoroacetamides in good to excellent radiochemical conversions. A mechanism where DBU acts as organomediator in this transformation is proposed.
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Affiliation(s)
- Antonio Bermejo Gómez
- AstraZeneca Personalised Healthcare and Biomarkers, PET Centre at Karolinska Institutet, Karolinska Universitetssjukhuset Solna, R5:02, SE-171 76 Stockholm, Sweden. and Department of Organic Chemistry, Stockholm University, Arrhenius Laboratory, SE-106 91 Stockholm, Sweden and Stockholm Brain Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Miguel A Cortés González
- Department of Organic Chemistry, Stockholm University, Arrhenius Laboratory, SE-106 91 Stockholm, Sweden and Stockholm Brain Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Marvin Lübcke
- Department of Organic Chemistry, Stockholm University, Arrhenius Laboratory, SE-106 91 Stockholm, Sweden and Stockholm Brain Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Magnus J Johansson
- CVMD iMed, Medicinal Chemistry AstraZeneca R&D, Mölndal, SE-431 83, Sweden
| | - Christer Halldin
- Stockholm Brain Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden and Department of Clinical Neuroscience, Karolinska Institutet, S-17176 Stockholm, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, Arrhenius Laboratory, SE-106 91 Stockholm, Sweden and Stockholm Brain Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Magnus Schou
- AstraZeneca Personalised Healthcare and Biomarkers, PET Centre at Karolinska Institutet, Karolinska Universitetssjukhuset Solna, R5:02, SE-171 76 Stockholm, Sweden. and Stockholm Brain Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden and Department of Clinical Neuroscience, Karolinska Institutet, S-17176 Stockholm, Sweden
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32
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Alam R, Diner C, Jonker S, Eriksson L, Szabó KJ. Catalytic Asymmetric Allylboration of Indoles and Dihydroisoquinolines with Allylboronic Acids: Stereodivergent Synthesis of up to Three Contiguous Stereocenters. Angew Chem Int Ed Engl 2016; 55:14417-14421. [PMID: 27735124 PMCID: PMC5129484 DOI: 10.1002/anie.201608605] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Indexed: 12/17/2022]
Abstract
The catalytic asymmetric allylboration of cyclic imines with γ,γ‐disubstituted allylboronic acids provides products with adjacent stereocenters in high yield and stereoselectivity. Various electrophiles, including 3,4‐dihydroisoquinolines and indoles, were prenylated in a fully stereodivergent fashion by switching the E/Z geometry of the allylboronate and/or the enantiomer of the BINOL catalyst. 3‐Methylindole provided products with three adjacent stereocenters with high stereoselectivity in one synthetic operation.
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Affiliation(s)
- Rauful Alam
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Colin Diner
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Sybrand Jonker
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry, Stockholm University, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, Sweden.
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33
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Alam R, Diner C, Jonker S, Eriksson L, Szabó KJ. Catalytic Asymmetric Allylboration of Indoles and Dihydroisoquinolines with Allylboronic Acids: Stereodivergent Synthesis of up to Three Contiguous Stereocenters. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608605] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rauful Alam
- Department of Organic Chemistry; Stockholm University; Sweden
| | - Colin Diner
- Department of Organic Chemistry; Stockholm University; Sweden
| | - Sybrand Jonker
- Department of Organic Chemistry; Stockholm University; Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry; Stockholm University; Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry; Stockholm University; Sweden
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34
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Affiliation(s)
- Weiming Yuan
- Department
of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department
of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
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35
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Yuan W, Eriksson L, Szabó KJ. Rhodium-Catalyzed Geminal Oxyfluorination and Oxytrifluoro-Methylation of Diazocarbonyl Compounds. Angew Chem Int Ed Engl 2016; 55:8410-5. [PMID: 27219856 PMCID: PMC5089581 DOI: 10.1002/anie.201602137] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/01/2016] [Indexed: 11/06/2022]
Abstract
A new reaction for the rhodium-catalyzed geminal-difunctionalization-based fluorination is presented. The substrates are aromatic and aliphatic diazocarbonyl compounds. As the fluorine source a stable and easily accessible benziodoxole reagent was used. A variety of alcohol, phenol, and carboxylic acid reagents were employed to introduce the second functionality. The reaction was extended to trifluoromethylation using a benziodoxolon reagent. The fluorination and trifluoromethylation reactions probably proceed by a rhodium-containing onium ylide type intermediate, which is trapped by either the F or CF3 electrophiles.
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Affiliation(s)
- Weiming Yuan
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry, Stockholm University, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, Sweden.
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36
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Affiliation(s)
- Weiming Yuan
- Department of Organic Chemistry; Stockholm University; Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry; Stockholm University; Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry; Stockholm University; Sweden
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37
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Belhomme MC, Wang D, Szabó KJ. Formation of C(sp3)–C(sp3) Bonds by Palladium Catalyzed Cross-Coupling of α-Diazoketones and Allylboronic Acids. Org Lett 2016; 18:2503-6. [DOI: 10.1021/acs.orglett.6b01132] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Marie-Charlotte Belhomme
- Department
of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Dong Wang
- Department
of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department
of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
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38
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Miralles N, Alam R, Szabó KJ, Fernández E. Transition-Metal-Free Borylation of Allylic and Propargylic Alcohols. Angew Chem Int Ed Engl 2016; 55:4303-7. [PMID: 26934578 PMCID: PMC4804746 DOI: 10.1002/anie.201511255] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 02/09/2016] [Indexed: 02/01/2023]
Abstract
The base-catalyzed allylic borylation of tertiary allylic alcohols allows the synthesis of 1,1-disubstituted allyl boronates, in moderate to high yield. The unexpected tandem performance of the Lewis acid-base adduct, [Hbase](+) [MeO-B2 pin2 ](-) favored the formation of 1,2,3-triborylated species from the tertiary allylic alcohols and 1-propargylic cyclohexanol at 90 °C.
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Affiliation(s)
- Núria Miralles
- Department Química Física i Inorgànica, University Rovira i Virgili, C/Marcel⋅lí Domingo s/n, Tarragona, Spain
| | - Rauful Alam
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Elena Fernández
- Department Química Física i Inorgànica, University Rovira i Virgili, C/Marcel⋅lí Domingo s/n, Tarragona, Spain.
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39
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Affiliation(s)
- Núria Miralles
- Department Química Física i Inorgànica; University Rovira i Virgili; C/Marcel⋅lí Domingo s/n Tarragona Spain
| | - Rauful Alam
- Department of Organic Chemistry; Stockholm University; Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry; Stockholm University; Sweden
| | - Elena Fernández
- Department Química Física i Inorgànica; University Rovira i Virgili; C/Marcel⋅lí Domingo s/n Tarragona Spain
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40
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Affiliation(s)
- Nadia O. Ilchenko
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Miguel A. Cortés
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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41
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Zhao J, Szabó KJ. Catalytic Borylative Opening of Propargyl Cyclopropane, Epoxide, Aziridine, and Oxetane Substrates: Ligand Controlled Synthesis of Allenyl Boronates and Alkenyl Diboronates. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201510132] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jian Zhao
- Department of Organic Chemistry; Stockholm University; Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry; Stockholm University; Sweden
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42
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Zhao J, Szabó KJ. Catalytic Borylative Opening of Propargyl Cyclopropane, Epoxide, Aziridine, and Oxetane Substrates: Ligand Controlled Synthesis of Allenyl Boronates and Alkenyl Diboronates. Angew Chem Int Ed Engl 2015; 55:1502-6. [PMID: 26663468 PMCID: PMC4736465 DOI: 10.1002/anie.201510132] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Indexed: 11/21/2022]
Abstract
A new copper‐catalyzed reaction for the stereo‐ and regioselective synthesis of alkenyl diboronates and allenyl boronates is presented. In this process propargyl derivatives of strained three/four‐membered rings were employed as substrates and B2pin2 was used as the boronate source. Selective formation of the alkenyl diboronate versus the allenyl boronate products was controlled by the choice of phosphine ligand.
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Affiliation(s)
- Jian Zhao
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, Sweden.
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43
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Yang Y, Szabó KJ. Synthesis of Allenes by Catalytic Coupling of Propargyl Carbonates with Aryl Iodides in the Presence of Diboron Species. J Org Chem 2015; 81:250-5. [DOI: 10.1021/acs.joc.5b01842] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Yuzhu Yang
- Department
of Organic Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department
of Organic Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
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44
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Affiliation(s)
- Arindam Das
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Dong Wang
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Marie-Charlotte Belhomme
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
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45
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Alam R, Vollgraff T, Eriksson L, Szabó KJ. Synthesis of Adjacent Quaternary Stereocenters by Catalytic Asymmetric Allylboration. J Am Chem Soc 2015; 137:11262-5. [DOI: 10.1021/jacs.5b07498] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Rauful Alam
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Tobias Vollgraff
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars Eriksson
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
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46
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Yuan W, Szabó KJ. Catalytic Intramolecular Aminofluorination, Oxyfluorination, and Carbofluorination with a Stable and Versatile Hypervalent Fluoroiodine Reagent. Angew Chem Int Ed Engl 2015; 54:8533-7. [PMID: 26069071 PMCID: PMC4531827 DOI: 10.1002/anie.201503373] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Indexed: 02/04/2023]
Abstract
Application of a fluoroiodine analogue of the Togni reagent was studied in fluorocyclization reactions. In the presence of a transition-metal catalyst the applied fluoroiodine reagent can be used for aminofluorination, oxyfluorination, and carbofluorination reactions. The described procedure has a very broad synthetic scope for preparation of functionalized hetero- and isocyclic compounds having a tertiary fluorine substituent.
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Affiliation(s)
- Weiming Yuan
- Department of Organic Chemistry, Stockholm University (Sweden) http://www.organ.su.se/ks/
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University (Sweden) http://www.organ.su.se/ks/.
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47
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Yuan W, Szabó KJ. Catalytic Intramolecular Aminofluorination, Oxyfluorination, and Carbofluorination with a Stable and Versatile Hypervalent Fluoroiodine Reagent. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503373] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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48
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Affiliation(s)
- Tony S. N. Zhao
- Department
of Organic Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Jian Zhao
- Department
of Organic Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Kálmán J. Szabó
- Department
of Organic Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden
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49
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Affiliation(s)
- Hong-Ping Deng
- Department of Organic
Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Dong Wang
- Department of Organic
Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic
Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
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Janson PG, Ilchenko NO, Diez-Varga A, Szabó KJ. Effects of B2pin2 and PCy3 on copper-catalyzed trifluoromethylation of substituted alkenes and alkynes with the Togni reagent. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.077] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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