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Lal S, Rao Cheekatla S, Suresh A, Ayyagari N, Mallick L, Pallikonda G, Desai P, Ahirwar P, Chowdhury A, Kumbhakarna N, Namboothiri INN. Synthesis, Characterization and Energetic Properties of Hydroxymethyl-Bishomocubanone Derivatives. Chemistry 2024; 30:e202401265. [PMID: 38863386 DOI: 10.1002/chem.202401265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 05/31/2024] [Accepted: 06/11/2024] [Indexed: 06/13/2024]
Abstract
The present work reports synthesis, characterization and theoretical insights on novel hydroxymethyl-bishomocubanone derivatives. Twelve new bishomocubanes (BHCs) were synthesized and fully characterized by various spectroscopic techniques and single crystal X-ray analysis. The densities of the title compounds were in the range of 1.30-1.59 g/cm3. Density-functional theory (DFT) based calculations at B3LYP/6-311++G(d,p) level of theory were performed on ten selected BHC based cage compounds. Propulsive and ballistic properties of newly synthesized hydroxymethyl-bishomocubanone derivatives in solid and liquid propulsion systems were calculated, and the results suggested that these compounds are superior to conventional fuel RP1 and binder HTPB. The detonation parameters revealed that these compounds are not explosive in nature and safe to use as solid propellants. Furthermore, kinetic and thermal stabilities of the title compounds were determined by HOMO-LUMO energy gap, ESP maps, impact sensitivity (h50) and bond dissociation energies (BDEs) followed by thermogravimetric analysis (TGA) and differential thermal analysis (DTA). Three compounds, a dinitroazide (Isp,vac=310.98 s), a dinitrate (Isp,vac=309.51 s), and a dinitronitrate (Isp,vac=309.20s) were found to be excellent candidates for volume limited applications.
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Affiliation(s)
- Sohan Lal
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Subba Rao Cheekatla
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Alati Suresh
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Narasimham Ayyagari
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Lovely Mallick
- Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Gangaram Pallikonda
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Poonam Desai
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Parmanand Ahirwar
- Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Arindrajit Chowdhury
- Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Neeraj Kumbhakarna
- Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
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2
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Kotha S, Mehta G, Jena K. Synthetic Approach toward Diverse Oxa-Cages via Olefin Metathesis. J Org Chem 2024; 89:5952-5965. [PMID: 38652151 DOI: 10.1021/acs.joc.3c02624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
This article demonstrates a late-stage modification of the cage propellanes that are transformed into intricate oxa-cycles via ring-rearrangement metathesis (RRM) and regioselective ring-closing metathesis (RCM) as crucial steps. In addition, we also report the extended pentacycloundecane (PCUD)-based oxa-cages involving the domino cycloetherification followed by olefin metathesis. These oxa-cages involve a domino sequence in which the PCUD core unit remains intact. [Ru]-based Grubbs catalysts are used to execute the metathesis step to assemble these higher-order oxa-cage systems. Spectroscopic data assigned structures of various products and were further supported by single-crystal X-ray diffraction analysis. The synthetic approach to these cage polycycles involves high complexity generating processes such as Diels-Alder reaction, [2 + 2] photocycloaddition, and RRM as well as RCM.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai 400076, India
| | - Gulazarahind Mehta
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai 400076, India
| | - Kunkumita Jena
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai 400076, India
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3
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Parakhin VV, Pokhvisneva GV, Shlykova NI, Samigullina AI, Nikitin SV, Smirnov GA, Gordeev PB, Kon'kova TS, Lempert DB, Pivkina AN. Highly energetic N-cyano-substituted CL-20 analogues: challenging the stability limits of polynitro hexaazaisowurtzitanes. Dalton Trans 2024; 53:6100-6111. [PMID: 38482568 DOI: 10.1039/d3dt04203k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
To design high-energy-density materials of a new level, it is necessary to develop methods for the functionalization of energetic scaffolds, which will make it possible to tune their physicochemical and energetic properties. For this reason, we have elaborated an approach for synthesizing a new series of energetic cage compounds with advanced properties by introducing the N-cyano group into the polynitro hexaazaisowurtzitane framework. The structures of the obtained substances were fully characterized with a combination of methods, including multinuclear (1H, 13C{1H}, 14N, and 15N{1H}) NMR and IR spectroscopy, high-resolution mass spectrometry, X-ray diffraction analysis, electron microscopy and quantum chemical calculations. For the resulting compounds, thermal stability and safety tests were carried out, calorimetric and pycnometric measurements were performed, and the energetic potential was determined by high-temperature chemical equilibrium thermodynamic calculations. The new cyano derivatives have an acceptable density (up to 1.92 g cm-3) and a high enthalpy of formation (up to 2 MJ kg-1), which is 2 times that of the benchmark CL-20. The resistance of the target compounds to friction (up to 220 N) is the highest compared to CL-20 and its known analogues. 4,10-Dicyano-2,6,8,12-tetranitro-2,4,6,8,10,12-hexaazaisowurtzitane of the new series is the most thermally stable (a Tdec of 238 °C) among the known energetic polynitro hexaazaisowurtzitanes and is the first derivative of this family to surpass CL-20 in heat resistance. Moreover, the specific impulse for the novel materials showed an improvement of 6.5-13 s over CL-20.
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Affiliation(s)
- Vladimir V Parakhin
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Galina V Pokhvisneva
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Nina I Shlykova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Aida I Samigullina
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Sergei V Nikitin
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Gennady A Smirnov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Pavel B Gordeev
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Moscow, 119991, Russian Federation.
| | - Tatyana S Kon'kova
- N. N. Semenov Federal Research Center for Chemical Physics Russian Academy of Sciences, Moscow, 119991, Russian Federation
| | - David B Lempert
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Ac. Semenov Avenue 1, Chernogolovka, Moscow Region, 142432, Russian Federation
| | - Alla N Pivkina
- N. N. Semenov Federal Research Center for Chemical Physics Russian Academy of Sciences, Moscow, 119991, Russian Federation
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4
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Kotha S, Mehta G. Molecular Acrobatics in Polycyclic Frames: Synthesis of "Kurmanediol" via Post-synthetic Modification of Cage Molecules by Olefinic Metathesis. J Org Chem 2023; 88:11650-11660. [PMID: 37506281 DOI: 10.1021/acs.joc.3c00968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
We report late-stage ring-opening metathesis (ROM), ring-rearrangement metathesis (RRM), and ring-closing metathesis (RCM) approaches to generate expanded pentacycloundecane (PCUD) cage derivatives. These higher-order intricate polycyclic cage systems are aesthetically pleasing and structurally intriguing. Their assembly maintains molecular symmetry during the entire synthetic sequence. To this end, metathesis-based catalysts are used to execute the ROM, RRM, and RCM strategies. The synthetic approach to these cage polycycles involves the Diels-Alder reaction, [2 + 2] photocycloaddition, RRM, ROM, and RCM as key steps.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Institution Indian Institute of Technology, Powai, Mumbai 400076, India
| | - Gulazarahind Mehta
- Department of Chemistry, Institution Indian Institute of Technology, Powai, Mumbai 400076, India
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5
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Patel TR, Ganguly B. Metal‐Free Catalytic Functionalization of Second −
C
sp
2
−H Bond of 1‐Methyl Pyrrole Using Bishomocubane‐Derived Aminoborane Frustrated Lewis Pairs: A Computational Study. ChemistrySelect 2023. [DOI: 10.1002/slct.202202728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Tulsi R. Patel
- Computation and Simulation Unit (Analytical & Environmental Science Division and Centralized Instrument Facility) CSIR-Central Salt & Marine Chemicals Research Institute Bhavnagar 364 002 Gujarat India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Bishwajit Ganguly
- Computation and Simulation Unit (Analytical & Environmental Science Division and Centralized Instrument Facility) CSIR-Central Salt & Marine Chemicals Research Institute Bhavnagar 364 002 Gujarat India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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6
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Kotha S, Mehta G. Late-stage Modification of Cage Diones by Tandem Metathesis. Chem Asian J 2023; 18:e202201022. [PMID: 36382422 DOI: 10.1002/asia.202201022] [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: 10/06/2022] [Revised: 11/12/2022] [Indexed: 11/17/2022]
Abstract
Herein, we report the application of tandem ring-opening cross-metathesis (ROCM) and tandem ring-opening cross-metathesis followed by cross-metathesis (ROCM/CM) in highly strained diastereomeric heptacyclic cage diones (HCCD's) catalyzed by ruthenium catalysts. These caged diastereomeric compounds have a high degree of ring strain as well as steric congestion. Therefore, the present work related to ROCM is unique and intricate as compared to simple norbornene derivatives. It is useful to prepare new hexacyclic cage derivatives suitable for high-energy density materials. The synthetic strategy of starting cage compounds features the Diels-Alder reaction, and [2+2] photocycloaddition as key steps.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai, 400 076, India
| | - Gulazarahind Mehta
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai, 400 076, India
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Lal S, Bhattacharjee A, Chowdhury A, Kumbhakarna N, Namboothiri INN. Approaches to 1,4-Disubstituted Cubane Derivatives as Energetic Materials: Design, Theoretical Studies and Synthesis. Chem Asian J 2022; 17:e202200489. [PMID: 35767352 DOI: 10.1002/asia.202200489] [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: 05/12/2022] [Revised: 06/26/2022] [Indexed: 11/10/2022]
Abstract
Novel 1,4-disubstituted cubane derivatives have been designed and selected ones have been successfully synthesized and characterized by various analytical and spectroscopic techniques, including single-crystal X-ray analysis. A detailed computational study at B3LYP/6-311++G(d,p) level of theory revealed that all newly designed 1,4-disubstituted cubane derivatives possess higher densities, higher density-specific impulse and superior ballistic properties when compared to conventional fuels, for example, RP-1. These compounds also exhibit acceptable kinetic and thermodynamic stabilities which were evaluated in terms of their HOMO-LUMO energy gap and bond dissociation energies, respectively, and are superior to TEX and many other compounds containing explosophoric groups. These results provide novel insights into the possible application of cubane-based energetic materials.
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Affiliation(s)
- Sohan Lal
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Argha Bhattacharjee
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Arindrajit Chowdhury
- Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Neeraj Kumbhakarna
- Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
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Suresh A, Lal S, Namboothiri INN. Regio- and stereoselective synthesis of functionalized and fused heterocycles from Morita-Baylis-Hillman adducts of dicyclopentadienone. Org Biomol Chem 2022; 20:2271-2281. [PMID: 35234778 DOI: 10.1039/d1ob02505h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient protocol for the Morita-Baylis-Hillman (MBH) reaction of dicyclopentadienone using CTAB has been developed. The MBH adduct was subsequently transformed to its acetate and bromide derivatives. The 1,3-bielectrophilic character of the MBH acetate and bromide was further explored with various 1,3-binucleophiles to construct various oxa-, thia- and aza-heterocycles. These reactions proceed through a cascade double Michael addition of 1,3-binucleophiles to the MBH acetate/bromide under basic conditions. Amenability of these reactions to scale-up and applications of the products in the synthesis of cyclopentenone-fused chromenones and thiopyranoindoles have been demonstrated.
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Affiliation(s)
- Alati Suresh
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India.
| | - Sohan Lal
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India.
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9
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Khan N, Abhyankar AC, Nandi T. Cyclodimerization of norbornadiene (NBD) into high energy-density fuel pentacyclotetradecane (PCTD) over mesoporous silica supported Co–Ni nanocatalyst. J CHEM SCI 2021. [DOI: 10.1007/s12039-021-01890-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Lal S, Chowdhury A, Kumbhakarna N, Nandagopal S, Kumar A, Namboothiri INN. Synthesis and energetic properties of homocubane based high energy density materials. Org Chem Front 2021. [DOI: 10.1039/d0qo01084g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Novel Homocubane based HED materials with high densities, HOF and density specific impulse are superior to conventional fuels RP1 and HTPB.
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Affiliation(s)
- Sohan Lal
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Arindrajit Chowdhury
- Department of Mechanical Engineering
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Neeraj Kumbhakarna
- Department of Mechanical Engineering
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Sundaramoorthy Nandagopal
- High Energy Materials Research Laboratory
- Defence Research and Development Organisation
- Pune 411 021
- India
| | - Arvind Kumar
- High Energy Materials Research Laboratory
- Defence Research and Development Organisation
- Pune 411 021
- India
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11
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Kotha S, Cheekatla SR, Meshram M. Design and Synthesis of Cage Molecules as High Energy Density Materials for Aerospace Applications. ChemCatChem 2020. [DOI: 10.1002/cctc.202001475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400 076 India
| | - Subba Rao Cheekatla
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400 076 India
| | - Milind Meshram
- Department of Chemistry The K.R.T. Arts B.H. Commerce & A.M. Science College Nashik 422 002 India
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12
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Pentacycloundecane (PCUD)‐Based Cage Frameworks as Potential Energetic Materials: Syntheses and Characterization. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000494] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Mondal S, Vaitheeswaran G, Gupta MK, Mittal R. Structural, elastic, vibrational and optical properties of energetic material octanitrocubane studied from first-principles theory. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:425502. [PMID: 32575079 DOI: 10.1088/1361-648x/ab9f4e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 06/23/2020] [Indexed: 06/11/2023]
Abstract
We present a thorough density functional theory based computational study of crystalline properties of cubane caged potential energetic material octanitrocubane (ONC). As expected for a layered molecular solid, van der Waals corrections are inevitable and the same has been incorporated to capture the ground state properties more accurately. Study of Born effective charge and zone centered phonon frequencies using density functional perturbation theory reveals the important role of N2, N4 type nitrogen and associated oxygen atoms in contributing to the high intensity infrared modes. From the calculated electronic band structure we can conclude that ONC is an insulator with a band gap of 5.31 eV. The optical properties of ONC are found to be nearly isotropic in low energy region in spite of strong anisotropic crystal structure.
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Affiliation(s)
- S Mondal
- Advanced Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad-500 046, Telangana, India
| | - G Vaitheeswaran
- School of Physics, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad-500 046, Telangana, India
| | - M K Gupta
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Ranjan Mittal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
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Shi Y, Liu X, Han Y, Yan P, Bie F, Cao H. Synthesis of bi-halogenated spiropolycyclic cage compounds. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151752] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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15
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Kotha S, Cheekatla SR. Design, synthesis, and rearrangement studies of gem-dimethyl containing cage systems. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130898] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Shi Y, Liu X, Han Y, Yan P, Bie F, Cao H. Diels–Alder reactions between cyclopentadiene analogs and benzoquinone in water and their application in the synthesis of polycyclic cage compounds. RSC Adv 2020; 10:739-745. [PMID: 35494451 PMCID: PMC9048223 DOI: 10.1039/c9ra09745g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 12/16/2019] [Indexed: 11/21/2022] Open
Abstract
Diels–Alder reactions between cyclopentadiene analogs and p-benzoquinone were explored in water and yielded 83–97% product, higher than the results reported in water with a catalyst or cetrimonium bromide (CTAB) micelles. The novel adduct 10 was synthesized and further used to synthesize the bi-cage hydrocarbon 4,4′-spirobi[pentacyclo[5.4.0.02,6.03,10.05,9]undecane], which has a high density (1.2663 g cm−3) and a high volumetric heat of combustion (53.353 MJ L−1). Four novel bi-cage hydrocarbon compounds were synthesized in water using this method starting from 2,2′-bi(p-benzoquinone) and cyclopentadiene analogs. Diels–Alder reactions between cyclopentadiene analogs and p-benzoquinone were explored in water and yielded 83–97% product, higher than the results reported in water with a catalyst or cetrimonium bromide (CTAB) micelles.![]()
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Affiliation(s)
- Yijun Shi
- Engineering and Technology Research Institute of Lunan Coal Chemical
- Zaozhuang University
- Zaozhuang 277160
- China
- College of Chemistry, Chemical Engineering and Materials Science
| | - Xuejing Liu
- Engineering and Technology Research Institute of Lunan Coal Chemical
- Zaozhuang University
- Zaozhuang 277160
- China
| | - Ying Han
- Engineering and Technology Research Institute of Lunan Coal Chemical
- Zaozhuang University
- Zaozhuang 277160
- China
| | - Peng Yan
- Engineering and Technology Research Institute of Lunan Coal Chemical
- Zaozhuang University
- Zaozhuang 277160
- China
| | - Fusheng Bie
- Engineering and Technology Research Institute of Lunan Coal Chemical
- Zaozhuang University
- Zaozhuang 277160
- China
| | - Han Cao
- Engineering and Technology Research Institute of Lunan Coal Chemical
- Zaozhuang University
- Zaozhuang 277160
- China
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18
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Kotha S, Cheekatla SR, Gunta R. Hexacyclo[6.5.1.0 1,5.0 5,12.0 7,11.0 9,13]tetradecane-4,6,14-trione. IUCRDATA 2018. [DOI: 10.1107/s2414314618008520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The structure of the title cage compound, C14H12O3, encompasses seven fused rings, viz. one four-membered, five five-membered and one six-membered. The four-membered ring is essentially planar, all five-membered rings adopt an envelope conformation and the six-membered ring adopts a boat conformation.
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Kotha S, Cheekatla SR. A New Synthetic Approach toC2-Symmetric Octacyclic Cage Diol via Claisen Rearrangement and Ring-Closing Metathesis as Key Steps. ChemistrySelect 2017. [DOI: 10.1002/slct.201701633] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry; Indian Institute of Technology-Bombay; Mumbai-Powai 400076 India
| | - Subba Rao Cheekatla
- Department of Chemistry; Indian Institute of Technology-Bombay; Mumbai-Powai 400076 India
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20
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Kotha S, Rao Cheekatla S, Mandal B. Synthesis and Rearrangement of Cage [4.3.2]Propellanes that Contain a Spiro Linkage. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700617] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry; Indian Institute of Technology-Bombay; Powai India
| | | | - Binita Mandal
- Department of Chemistry; Indian Institute of Technology-Bombay; Powai India
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21
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Shi Y, Jiang J, Ma L, Wang J, Li W. Synthesis of 4,4′-bipentacyclo[5.4.0.0 2,6 .0 3,10 .0 5,9 ]undecane. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.02.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Lal S, Chowdhury A, Namboothiri IN. Synthesis of annulated oxa-triquinanes and oxa-diquinanes via cascade Michael addition-intramolecular alkylation involving α-halodicyclopentadienones. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Mallick L, Lal S, Reshmi S, Namboothiri INN, Chowdhury A, Kumbhakarna N. Theoretical studies on the propulsive and explosive performance of strained polycyclic cage compounds. NEW J CHEM 2017. [DOI: 10.1039/c6nj02444k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbon-based cage compounds could be better candidates as propellant ingredients than the currently used ones as per molecular modellingab initiocalculations.
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Affiliation(s)
- Lovely Mallick
- Department of Aerospace Engineering
- Indian Institute of Technology Bombay
- India
| | - Sohan Lal
- Department of Chemistry
- Indian Institute of Technology Bombay
- India
| | - Sasidharakurup Reshmi
- Polymers and Special Chemicals Group
- Vikram Sarabhai Space Centre
- Thiruvananthapuram
- India
| | | | | | - Neeraj Kumbhakarna
- Department of Mechanical Engineering
- Indian Institute of Technology Bombay
- India
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Natarajan P, Chaudhary R, Venugopalan P. Silver(I)-Promoted ipso-Nitration of Carboxylic Acids by Nitronium Tetrafluoroborate. J Org Chem 2015; 80:10498-504. [DOI: 10.1021/acs.joc.5b02133] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Palani Natarajan
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India
| | - Renu Chaudhary
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India
| | - Paloth Venugopalan
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India
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