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Vala MK, Sudhakar C, Adurthi S, Vanam S. The synthesis of phenyl carbamates catalyzed by iron (II) bromide: An oxidative approach for cross-coupling of phenols with formamides. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.2017459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Manoj Kumar Vala
- Department of Chemistry, GITAM Deemed to be University, Rudraram, Hyderabad, India
- Department of Chemistry, TARA Govt Degree College, Sangareddy, India
| | - Chithaluri Sudhakar
- Department of Chemistry, GITAM Deemed to be University, Rudraram, Hyderabad, India
| | - Suryakumari Adurthi
- Department of Chemistry, GITAM Deemed to be University, Rudraram, Hyderabad, India
- Department of Chemistry, TARA Govt Degree College, Sangareddy, India
| | - Shekhar Vanam
- Department of Chemistry, KRR Govt Degree College, Kodad, Telangana, India
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Ghosh S, Ghosh A, Biswas S, Sengupta M, Roy D, Islam SM. Palladium Grafted Functionalized Nanomaterial: An Efficient Catalyst for the CO
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Fixation of Amines and Production of Organic Carbamates. ChemistrySelect 2019. [DOI: 10.1002/slct.201900138] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Swarbhanu Ghosh
- Department of ChemistryUniversity of Kalyani, Kalyani, Nadia 741235, W.B. India
| | - Aniruddha Ghosh
- Department of ChemistryUniversity of Kalyani, Kalyani, Nadia 741235, W.B. India
| | - Surajit Biswas
- Department of ChemistryUniversity of Kalyani, Kalyani, Nadia 741235, W.B. India
| | - Manideepa Sengupta
- Department of ChemistryUniversity of Kalyani, Kalyani, Nadia 741235, W.B. India
| | - Dipanwita Roy
- Department of ChemistryUniversity of Kalyani, Kalyani, Nadia 741235, W.B. India
| | - Sk. Manirul Islam
- Department of ChemistryUniversity of Kalyani, Kalyani, Nadia 741235, W.B. India
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Biswas S, Khatun R, Sengupta M, Islam SM. Polystyrene supported Zinc complex as an efficient catalyst for cyclic carbonate formation via CO2 fixation under atmospheric pressure and organic carbamates production. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.04.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zhao X, Li W, Wang J, Ma D. Convergent Route to ent-Kaurane Diterpenoids: Total Synthesis of Lungshengenin D and 1α,6α-Diacetoxy-ent-kaura-9(11),16-dien-12,15-dione. J Am Chem Soc 2017; 139:2932-2935. [DOI: 10.1021/jacs.7b00140] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Xiangbo Zhao
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Wu Li
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Junjie Wang
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Dawei Ma
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
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Jin KJ, Collum DB. Solid-State and Solution Structures of Glycinimine-Derived Lithium Enolates. J Am Chem Soc 2015; 137:14446-55. [PMID: 26554898 PMCID: PMC4762874 DOI: 10.1021/jacs.5b09524] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A combination of crystallographic, spectroscopic, and computational studies was applied to study the structures of lithium enolates derived from glycinimines of benzophenone and (+)-camphor. The solvents examined included toluene and toluene containing various concentrations of tetrahydrofuran, N,N,N',N'-tetramethylethylenediamine (TMEDA), (R,R)-N,N,N',N'-tetramethylcyclohexanediamine [(R,R)-TMCDA], and (S,S)-N,N,N',N'-tetramethylcyclohexanediamine [(S,S)-TMCDA]. Crystal structures show chelated monomers, symmetric disolvated dimers, S4-symmetric tetramers, and both S6- and D3d-symmetric hexamers. (6)Li NMR spectroscopic studies in conjunction with the method of continuous variations show how these species distribute in solution. Density functional theory computations offer insights into experimentally elusive details.
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Affiliation(s)
- Kyoung Joo Jin
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301
| | - David B. Collum
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301
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Tomasevich LL, Collum DB. Structure determination using the method of continuous variation: lithium phenolates solvated by protic and dipolar aprotic ligands. J Org Chem 2013; 78:7498-507. [PMID: 23806055 PMCID: PMC3759316 DOI: 10.1021/jo401080n] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The method of continuous variation (MCV) was used in conjunction with (6)Li NMR spectroscopy to characterize four lithium phenolates solvated by a range of solvents, including N,N,N',N'-tetramethylethylenediamine, Et2O, pyridine, protic amines, alcohols, and highly dipolar aprotic solvents. Dimers, trimers, and tetramers were observed, depending on the precise lithium phenolate-solvent combinations. Competition experiments (solvent swaps) provide insights into the relative propensities toward mixed solvation.
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Affiliation(s)
- Laura L. Tomasevich
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301
| | - David B. Collum
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301
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Barbion J, Sorin G, Selkti M, Kellenberger E, Baati R, Santoro S, Himo F, Pancrazi A, Lannou MI, Ardisson J. Stereoselective functionalization of pyrrolidinone moiety towards the synthesis of salinosporamide A. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.05.103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Hémery T, Becker J, Fröhlich R, Hoppe D. (-)-Myrtenyl N,N-Diisopropylcarbamate: Stereochemistry of Lithiation and Electrophilic Substitution Directed by Dynamic Kinetic Diastereoisomer Resolution. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000390] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kizirian J. Mechanism and Stereochemical Features in Asymmetric Deprotonation Using RLi/(–)‐Sparteine Bases. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/9783906390628.ch6] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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García Ruano JL, Alemán J, Parra A, Alcudia A, Maya C. Synthesis and Stereoselective Halogenolysis of Optically Pure Benzylstannanes. J Org Chem 2009; 74:2145-52. [DOI: 10.1021/jo802725r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- José L. García Ruano
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain, Departamento de Química Orgánica y Farmaceútica, Facultad de Farmacia, Universidad de Sevilla, 41017 Sevilla, Spain, and Departamento de Química Inorgánica y Farmaceútica, Facultad de Farmacia, Universidad de Sevilla, 41017 Sevilla, Spain
| | - José Alemán
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain, Departamento de Química Orgánica y Farmaceútica, Facultad de Farmacia, Universidad de Sevilla, 41017 Sevilla, Spain, and Departamento de Química Inorgánica y Farmaceútica, Facultad de Farmacia, Universidad de Sevilla, 41017 Sevilla, Spain
| | - Alejandro Parra
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain, Departamento de Química Orgánica y Farmaceútica, Facultad de Farmacia, Universidad de Sevilla, 41017 Sevilla, Spain, and Departamento de Química Inorgánica y Farmaceútica, Facultad de Farmacia, Universidad de Sevilla, 41017 Sevilla, Spain
| | - Ana Alcudia
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain, Departamento de Química Orgánica y Farmaceútica, Facultad de Farmacia, Universidad de Sevilla, 41017 Sevilla, Spain, and Departamento de Química Inorgánica y Farmaceútica, Facultad de Farmacia, Universidad de Sevilla, 41017 Sevilla, Spain
| | - Celia Maya
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain, Departamento de Química Orgánica y Farmaceútica, Facultad de Farmacia, Universidad de Sevilla, 41017 Sevilla, Spain, and Departamento de Química Inorgánica y Farmaceútica, Facultad de Farmacia, Universidad de Sevilla, 41017 Sevilla, Spain
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Riggs JC, Singh KJ, Yun M, Collum DB. Anionic Snieckus-Fries rearrangement: solvent effects and role of mixed aggregates. J Am Chem Soc 2008; 130:13709-17. [PMID: 18798619 PMCID: PMC2626637 DOI: 10.1021/ja804087r] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lithiated aryl carbamates (ArLi) bearing methoxy or fluoro substituents in the meta position are generated from lithium diisopropylamide (LDA) in THF, n-BuOMe, Me2NEt, dimethoxyethane (DME), N,N,N',N'-tetramethylethylenediamine (TMEDA), N,N,N',N'-tetramethylcyclohexanediamine (TMCDA), and hexamethylphosphoramide (HMPA). The aryllithiums are shown with (6)Li, (13)C, and (15)N NMR spectroscopies to be monomers, ArLi-LDA mixed dimers, and ArLi-LDA mixed trimers, depending on the choice of solvent. Subsequent Snieckus-Fries rearrangements afford ArOLi-LDA mixed dimers and trimers of the resulting phenolates. Rate studies of the rearrangement implicate mechanisms based on monomers, mixed dimers, and mixed trimers.
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Affiliation(s)
- Jason C Riggs
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, USA
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Becker J, Bergander K, Fröhlich R, Hoppe D. Asymmetric Total Synthesis and X-Ray Crystal Structure of the Cytotoxic Marine Diterpene (+)-Vigulariol. Angew Chem Int Ed Engl 2008; 47:1654-7. [DOI: 10.1002/anie.200704678] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Becker J, Bergander K, Fröhlich R, Hoppe D. Asymmetrische Totalsynthese und Festkörperstruktur des marinen cytotoxischen Diterpens (+)-Vigulariol. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200704678] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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