1
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Scrivener SG, Wang YM. A C-H functionalization approach to diverse nitrogenous scaffolds through conjugate addition of catalytic allyliron nucleophiles. Chem Sci 2024; 15:8850-8857. [PMID: 38873053 PMCID: PMC11168081 DOI: 10.1039/d4sc00655k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 04/29/2024] [Indexed: 06/15/2024] Open
Abstract
Cyclopentadienyliron(ii) dicarbonyl complexes capable of coordinating to and enhancing the acidity of a range of unsaturated substrates have emerged as a new class of base-metal derived catalysts for C-H functionalization. In this manuscript, the iron-catalyzed C-H functionalization of allylic C(sp3)-H bonds using nitrogen containing α,β-unsaturated carbonyl compounds as coupling partners is reported. Employing a cationic cyclopentadienyliron dicarbonyl complex, this redox neutral process converts simple alkenes into allylic anion equivalents for 1,4-addition into maleimides, acyclic α,β-unsaturated imides, and vinylogous amides. The judicious pairing of pyridine and alkylamine bases with Lewis acid additives allowed each of these classes of substrates to be successfully employed, allowing for the formation of a diverse collection of cyclic and acyclic nitrogen-containing compounds featuring C-C unsaturation. The resulting Michael adducts can be further transformed into a variety of useful scaffolds such as allylated pyrroles, pyrrolidines, and carbocyclic acids.
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Affiliation(s)
- Sarah G Scrivener
- Department of Chemistry, University of Pittsburgh Pittsburgh Pennsylvania 15260 USA
| | - Yi-Ming Wang
- Department of Chemistry, University of Pittsburgh Pittsburgh Pennsylvania 15260 USA
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2
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Maier KB, Rust LN, Kupara CI, Woods M. Diastereoselective Synthesis of α-Aryl-Substituted LnDOTA Chelates from Achiral Starting Materials by Deracemization Under Mild Conditions. Chemistry 2023; 29:e202301887. [PMID: 37519104 DOI: 10.1002/chem.202301887] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/26/2023] [Accepted: 07/26/2023] [Indexed: 08/01/2023]
Abstract
Substituted derivatives of the DOTA framework are of general interest to alter chelate properties and facilitate the conjugation of chelates to other molecular structures. However, the scope of substituents that can be introduced into the α-position has traditionally been limited by the availability of a suitable enantiopure starting materials to facilitate a stereoselective synthesis. Tetra-substituted DOTA derivatives with phenyl and benzoate substituents in the α-position have been prepared. Initial syntheses used enantiopure starting materials but did not afford enantiopure products. This indicates that the integrity of the stereocenters was not preserved during synthesis, despite the homo-chiral diastereoisomer being the major reaction product. The homochiral diastereoisomer could be produced as the major or sole reaction product when starting from racemic or even achiral materials. Deracemization was found to occur during chelation through the formation of an enolate stabilized by the aryl substituent. This general ability of aryl groups to enable deracemization greatly increases the range of substituents that can be introduced into DOTA-type ligands with diastereochemical selectivity.
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Affiliation(s)
- Karley B Maier
- Department of Chemistry, Portland State University 1719, SW 10th Ave, Portland, OR 97201, USA
| | - Lauren N Rust
- Department of Chemistry, Portland State University 1719, SW 10th Ave, Portland, OR 97201, USA
| | - Charlene I Kupara
- Department of Chemistry, Portland State University 1719, SW 10th Ave, Portland, OR 97201, USA
| | - Mark Woods
- Department of Chemistry, Portland State University 1719, SW 10th Ave, Portland, OR 97201, USA
- Advanced Imaging Research Center, Oregon Health and Science University, 1381 SW Sam Jackson Park Road, Portland, OR 97239, USA
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3
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Dong Q, Huang Q, Wang M, Chen H, Zi Y, Huang W. 1,3-Dichloro-5,5-Dimethylhydantoin Promoted Esterification of Carboxylic Acids under Mild Conditions. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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4
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Charaschanya M, Maskrey TS, LaPorte MG, Janjic JM, Wipf P. Synthesis and Optimization of Nitroxide-Based Inhibitors of Ferroptotic Cell Death in Cancer Cells and Macrophages. ACS Med Chem Lett 2022; 13:403-408. [PMID: 35300093 PMCID: PMC8919392 DOI: 10.1021/acsmedchemlett.1c00561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 01/31/2022] [Indexed: 11/30/2022] Open
Abstract
JP4-039 is an alkene peptide isostere that acts as a low-micromolar inhibitor of erastin- and RSL-3-induced ferroptotic cell death in the HT-1080 cell line. In this work, we have developed new synthetic strategies that allow access to analogues of this lead structure. Enantioselective vinylogous Mannich or cross-metathesis reactions were key to the preparation of a series of analogues that culminated in the preparation of the ca. 30-fold more potent analogue (S)-6c. Structure-activity relationship analyses used both HT-1080 cells and a luminescence-based ferroptosis assay in RAW 264.7 macrophages. In particular, α,α-disubstituted alkene peptide isosteres (Rα ≠ H) were found to exceed the potency of the corresponding glycine (Rα = H) derivatives.
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Affiliation(s)
- Manwika Charaschanya
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Taber S Maskrey
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Matthew G LaPorte
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jelena M Janjic
- Pharmaceutical Sciences, Duquesne University School of Pharmacy, 415 Mellon Hall, Pittsburgh, Pennsylvania 15282, United States.,Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Peter Wipf
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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5
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Nubbemeyer U, Trippe L, Nava A, Frank A, Schollmeyer D. Synthesis of Enantiopure ω-(4-Fluorophenyl)-6,11-Methylene Lipoxin B4 Methyl Ester. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1512-1763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AbstractThe synthesis of Lipoxin B4 analogues (LXB4) to gain access to stabilized inflammation-resolving compounds is an active field of research. Focusing on variation and stabilization of the conjugated E,Z,E,E C6–C13 tetraene moiety of natural LXB4, a methylene bridge introduced between C6 and C11 suppresses any Z/E isomerization of the C8–C9 olefin. Furthermore, rapid ω-oxidation (C20) should be avoided by replacing the C18–C20 segment by an aromatic moiety. Optically active C1–C12 building blocks were accessed from methyl cycloheptatriene-1-carboxylate (C6–C11, C21) and glutaryl chloride (C1–C5) as described earlier. The ω-segment was generated via a five-step sequence starting from 4-arylbutanoic acid. Horner key olefination enabled assembly of the carbon backbone. A final five-step sequence including a chelate Cram reduction of the unsaturated ketone moiety afforded the target ω-aryl 6,11-methylene-LXB4 methyl ester.
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Affiliation(s)
| | - Lukas Trippe
- Organische Chemie/Johannes Gutenberg-Universität Mainz
| | | | - Andrea Frank
- Organische Chemie/Johannes Gutenberg-Universität Mainz
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6
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7
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Zheng Y, Zhao Y, Tao S, Li X, Cheng X, Jiang G, Wan X. Green Esterification of Carboxylic Acids Promoted by
tert
‐Butyl Nitrite. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100326] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yonggao Zheng
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Yanwei Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Suyan Tao
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Xingxing Li
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Xionglve Cheng
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Gangzhong Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
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8
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Trippe L, Nava A, Frank A, Nubbemeyer U. Synthesis of Enantiopure 6,11‐Methylene Lipoxin B
4
Methyl Ester. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001591] [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)
- Lukas Trippe
- Organische Chemie Johannes Gutenberg-Universität Mainz Duesbergweg 10–14 D-55128 Mainz Germany
| | - Analuisa Nava
- BASF Lampertheim GmbH Chemiestr. 22 68623 Lampertheim Germany
| | - Andrea Frank
- Organische Chemie Johannes Gutenberg-Universität Mainz Duesbergweg 10–14 D-55128 Mainz Germany
| | - Udo Nubbemeyer
- Organische Chemie Johannes Gutenberg-Universität Mainz Duesbergweg 10–14 D-55128 Mainz Germany
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9
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Wu YH, Zhang LY, Wang NX, Xing Y. Recent advances in the rare-earth metal triflates-catalyzed organic reactions. CATALYSIS REVIEWS 2020. [DOI: 10.1080/01614940.2020.1831758] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Yue-Hua Wu
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Lei-Yang Zhang
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Nai-Xing Wang
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Yalan Xing
- Department of Chemistry, William Paterson University of New Jersey, New Jersey, United States
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10
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Shao W, Besnard C, Guénée L, Mazet C. Ni-Catalyzed Regiodivergent and Stereoselective Hydroalkylation of Acyclic Branched Dienes with Unstabilized C(sp3) Nucleophiles. J Am Chem Soc 2020; 142:16486-16492. [DOI: 10.1021/jacs.0c08319] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Wen Shao
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, Geneva 1211, Switzerland
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva, 24 quai Ernest Ansermet, Geneva 1211, Switzerland
| | - Laure Guénée
- Laboratory of Crystallography, University of Geneva, 24 quai Ernest Ansermet, Geneva 1211, Switzerland
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, Geneva 1211, Switzerland
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11
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Smith IT, Neeley JB, Brinley TD, Fullmer PR, Andrus MB. Synthesis of pyrroloindolines through formal [3 + 2]-cycloaddition of indoles with chiral N-2-acetamidoacrylyl oxazolidinones. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Glace AW, Cohen BM, Dixon DD, Beutner GL, Vanyo D, Akpinar F, Rosso V, Fraunhoffer KJ, DelMonte AJ, Santana E, Wilbert C, Gallo F, Bartels W. Safe Scale-up of an Oxygen-Releasing Cleavage of Evans Oxazolidinone with Hydrogen Peroxide. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.9b00462] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Um TW, Lee G, Shin S. Enantioselective Synthesis of Tertiary α,α-Diaryl Carbonyl Compounds Using Chiral N,N'-Dioxides under Umpolung Conditions. Org Lett 2020; 22:1985-1990. [PMID: 32045252 DOI: 10.1021/acs.orglett.0c00333] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Brønsted acid-catalyzed addition of the chiral N,N'-dioxide into ynamides generated enolonium ions in situ which underwent enantioselective alkylation by indoles, pyrroles, and phenols, without racemization of the formed tertiary center. This external oxidant approach allows for the use of unmodified nucleophiles and does not leave trace groups from the oxidant, which significantly increases the synthetic efficiency and the product diversity. Furthermore, the byproduct of the N,N'-dioxide could be efficiently recycled into an optically pure form.
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Affiliation(s)
- Tae-Woong Um
- Department of Chemistry, Research Institute for Natural Sciences and Center for New Directions in Organic Synthesis (CNOS), Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Girim Lee
- Department of Chemistry, Research Institute for Natural Sciences and Center for New Directions in Organic Synthesis (CNOS), Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Seunghoon Shin
- Department of Chemistry, Research Institute for Natural Sciences and Center for New Directions in Organic Synthesis (CNOS), Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
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14
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Maity P, Gujjar M, Vellingiri R, Lakshminarasimhan T, DelMonte AJ, Young IS, Eastgate MD, Vaidyanathan R. Cerium(III) Chloride-Mediated Stereoselective Reduction of a 4-Substituted Cyclohexanone Using NaBH 4. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00458] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Prantik Maity
- Chemical Development and API Supply, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Manjunath Gujjar
- Chemical Development and API Supply, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Raghukumar Vellingiri
- Chemical Development and API Supply, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Thirumalai Lakshminarasimhan
- Chemical Development and API Supply, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Albert J. DelMonte
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Ian S. Young
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Martin D. Eastgate
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Rajappa Vaidyanathan
- Chemical Development and API Supply, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
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15
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Fraunhoffer KJ, DelMonte AJ, Beutner GL, Bultman MS, Camacho K, Cohen B, Dixon DD, Fan Y, Fanfair D, Freitag AJ, Glace AW, Gonzalez-Bobes F, Gujjar M, Haley MW, Hickey MR, Ho J, Iyer V, Maity P, Patel S, Rosso VW, Schmidt MA, Stevens JM, Tan Y, Wilbert C, Young IS, Yu M. Rapid Development of a Commercial Process for Linrodostat, an Indoleamine 2,3-Dioxygenase (IDO) Inhibitor. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00359] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kenneth J. Fraunhoffer
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Albert J. DelMonte
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Gregory L. Beutner
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Michael S. Bultman
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Kathryn Camacho
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Benjamin Cohen
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Darryl D. Dixon
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Yu Fan
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Dayne Fanfair
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Adam J. Freitag
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Andrew W. Glace
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Francisco Gonzalez-Bobes
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Manjunath Gujjar
- Chemical and Synthetic Development, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Matthew W. Haley
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Matthew R. Hickey
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Jeanne Ho
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Vidya Iyer
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Prantik Maity
- Chemical and Synthetic Development, Biocon Bristol-Myers Squibb Research and Development Center, Biocon Park, Jigani Link Road, Bommasandra IV, Bangalore 560099, India
| | - Sunil Patel
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Victor W. Rosso
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Michael A. Schmidt
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Jason M. Stevens
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Yichen Tan
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Christopher Wilbert
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Ian S. Young
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Miao Yu
- Chemical and Synthetic Development, Bristol-Myers Squibb Global Product Development and Supply, One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
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16
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Abstract
[2,3]-Sigmatropic rearrangements (Wittig rearrangements) of α-alkoxy oxazolidinone enolates are described. Whereas alkali metal enolates fail, owing to facile deacylation, boron enolates generated from di-n-butylboron triflate and triethylamine rearranged in good yields and high selectivities with exceptions noted. IR and NMR spectroscopies show the boron is chelated by the α-alkoxy group rather than the more distal oxazolidinone carbonyl in the complex and enolate. The rearrangement product contains a boron alkoxide that remains unchelated by either carbonyl. Optimization was guided by density functional theory computations, suggesting that valine-derived oxazolidinones would be superior to the phenylalanine-derived analogues.
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Affiliation(s)
- Zirong Zhang
- Department of Chemistry and Chemical Biology Baker Laboratory , Cornell University , Ithaca , New York 14853-1301 , United States
| | - David B Collum
- Department of Chemistry and Chemical Biology Baker Laboratory , Cornell University , Ithaca , New York 14853-1301 , United States
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17
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Beutner GL, Cohen BM, DelMonte AJ, Dixon DD, Fraunhoffer KJ, Glace AW, Lo E, Stevens JM, Vanyo D, Wilbert C. Revisiting the Cleavage of Evans Oxazolidinones with LiOH/H2O2. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00124] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gregory L. Beutner
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Benjamin M. Cohen
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Albert J. DelMonte
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Darryl D. Dixon
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Kenneth J. Fraunhoffer
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Andrew W. Glace
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Ehrlic Lo
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Jason M. Stevens
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Dale Vanyo
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Christopher Wilbert
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
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