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Lathwal A, Mathew BP, Nath M. Syntheses, Biological and Material Significance of Dihydro[1,3]oxazine Derivatives: An Overview. CURR ORG CHEM 2021. [DOI: 10.2174/1385272824999201008154659] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Dihydro[1,3]oxazines are an important class of heterocyclic compounds having a
wide range of biological and material properties. Medicinally, they possess diverse pharmacological
activities, such as bactericidal, fungicidal, microbiocidal, antitumor, anti-HIV, and
anti-inflammatory agents. Apart from being biologically active, they are materially useful for
making polybenzoxazines. Polybenzoxazines are a novel class of non-conjugated thermosetting
materials that belong to the family of addition-curable phenolic resins. They have lucrative
properties such as small shrinkage in curing, low water absorption, good thermal stability,
and there is no release of volatile materials during cure, and no need for catalyst and inexpensive
raw materials. Further, the flexibility in designing a monomer gives polybenzoxazines
an additional edge over ordinary phenolic resins. This review briefly describes the syntheses,
including eco-friendly strategies, and biological and material significance of various dihydro[1,3]oxazine
derivatives.
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Affiliation(s)
- Ankit Lathwal
- Department of Chemistry, Faculty of Science, University of Delhi, Delhi-110 007, India
| | - Bijoy P. Mathew
- Department of Chemistry, Vimala College (Autonomous), Thrissur-680 009, Kerala, India
| | - Mahendra Nath
- Department of Chemistry, Faculty of Science, University of Delhi, Delhi-110 007, India
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Xiao P, Cao W, Chen J, Chen Y. Synthesis of naphthoxindoles, anthraoxindoles and phenanthrofuranones from arynes. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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One-step synthesis of benzo[ g ]phthalazines and naphtho[2,3- g ]phthalazines from benzo- or naphtho-oxabicyclic alkene. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.10.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Chen J, Chen Y, Wang X, Kong K, Cao W, Chen J. Synthesis and characterization of oxadisilole-fused phenanthridines and dioxatrisilole-fused phenanthridines from benzyne. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.05.064] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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González-Rodríguez C, Suárez JR, Varela JA, Saá C. Nucleophilic Addition of Amines to Ruthenium Carbenes:ortho-(Alkynyloxy)benzylamine Cyclizations towards 1,3-Benzoxazines. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410284] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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González-Rodríguez C, Suárez JR, Varela JA, Saá C. Nucleophilic addition of amines to ruthenium carbenes: ortho-(alkynyloxy)benzylamine cyclizations towards 1,3-benzoxazines. Angew Chem Int Ed Engl 2015; 54:2724-8. [PMID: 25640908 DOI: 10.1002/anie.201410284] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Indexed: 11/09/2022]
Abstract
A new ruthenium-catalyzed cyclization of ortho-(alkynyloxy)benzylamines to dihydro-1,3-benzoxazines is reported. The cyclization is thought to take place via the vinyl ruthenium carbene intermediates which are easily formed from [Cp*RuCl(cod)] and N2 CHSiMe3 . The mild reaction conditions and the efficiency of the procedure allow the easy preparation of a broad range of new 2-vinyl-2-substituted 1,3-benzoxazine derivatives. Rearrangement of an internal C(sp) in the starting material into a tetrasubstituted C(sp(3) ) atom in the final 1,3-benzoxazine is highly remarkable.
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Affiliation(s)
- Carlos González-Rodríguez
- Departamento de Química Orgánica y Centro Singular de Investigación en Química Biológica y Materiales Moleculares (CIQUS), Universidad de Santiago de Compostela, 15782 Santiago de Compostela (Spain) http://www.usc.es/gi1603/saa
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Zhang J, Chen Y, Chen X, Zheng X, Cao W, Chen J, Zhang M. Synthesis and characterization of oxadisilole-fused acridines, dioxatrisilole-fused acridines and benzo[b]acridines. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Richers M, Breugst M, Platonova AY, Ullrich A, Dieckmann A, Houk KN, Seidel D. Redox-neutral α-oxygenation of amines: reaction development and elucidation of the mechanism. J Am Chem Soc 2014; 136:6123-35. [PMID: 24689802 PMCID: PMC4333595 DOI: 10.1021/ja501988b] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Indexed: 12/19/2022]
Abstract
Cyclic secondary amines and 2-hydroxybenzaldehydes or related ketones react to furnish benzo[e][1,3]oxazine structures in generally good yields. This overall redox-neutral amine α-C-H functionalization features a combined reductive N-alkylation/oxidative α-functionalization and is catalyzed by acetic acid. In contrast to previous reports, no external oxidants or metal catalysts are required. Reactions performed under modified conditions lead to an apparent reductive amination and the formation of o-hydroxybenzylamines in a process that involves the oxidation of a second equivalent of amine. A detailed computational study employing density functional theory compares different mechanistic pathways and is used to explain the observed experimental findings. Furthermore, these results also reveal the origin of the catalytic efficiency of acetic acid in these transformations.
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Affiliation(s)
- Matthew
T. Richers
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Martin Breugst
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
- Department
für Chemie, Universität zu
Köln, Greinstraße
4, 50939 Köln, Germany
| | - Alena Yu. Platonova
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
- Department
of Organic Synthesis Technology, Ural Federal
University, Yekaterinburg 620002, Russia
| | - Anja Ullrich
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
- Institut
für Bioorganische Chemie, Heinrich-Heine
Universität Düsseldorf, Stetternicher Forst, 52426 Jülich, Germany
| | - Arne Dieckmann
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
| | - K. N. Houk
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
| | - Daniel Seidel
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
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