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Ali R, Ahmed W, Jayant V, alvi S, Ahmed N, Ahmed A. Metathesis reactions in total‐ and natural product fragments syntheses. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100753] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rashid Ali
- Jamia Millia Islamia New Delhi India 110025 Department of Chemistry Jamia Nagar,New Delhi india110025 110025 New Delhi INDIA
| | - Waqar Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Vikrant Jayant
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - shakeel alvi
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Nadeem Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Azeem Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
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2
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1H NMR Analysis of the Metathesis Reaction between 1-Hexene and (E)-Anethole Using Grubbs 2nd Generation Catalyst: Effect of Reaction Conditions on (E)-1-(4-Methoxyphenyl)-1-hexene Formation and Decomposition. Catalysts 2021. [DOI: 10.3390/catal11121483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The metathesis of 1-hexene and (E)-anethole in the presence of Grubbs 2nd generation catalyst was monitored by in situ 1H NMR spectroscopy at different temperatures (15 °C, 25 °C, and 45 °C) and anethole mol fractions (XAnethole ≈ 0.17, 0.29, 0.5, 0.71, 0.83). Time traces confirmed the instantaneous formation of (E)-1-(4-methoxyphenyl)-1-hexene, the cross-metathesis product. A maximum concentration of (E)-1-(4-methoxyphenyl)-1-hexene is reached fairly fast (the time depending on the reaction conditions), and this is followed by a decrease in the concentration of (E)-1-(4-methoxyphenyl)-1-hexene due to secondary metathesis. The maximum concentration of (E)-1-(4-methoxyphenyl)-1-hexene was more dependent on the XAnethole than the temperature. The highest TOF (3.46 min−1) was obtained for the reaction where XAnethole was 0.16 at 45 °C. The highest concentration of the cross-metathesis product was however achieved after 6 min with an anethole mol fraction of 0.84 at 25 °C. A preliminary kinetic study indicated that the secondary metathesis reaction followed first order kinetics.
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Masoud SM, Vorobyeva DV, Petropavlovskikh DA, Bruneau C, Osipov SN. Fluorine-containing ruthenium-based olefin metathesis catalysts. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4984] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The review summarizes literature data on the methods for the introduction of fluorine atoms and fluoralkyl groups into different ligands to construct metathesis-active ruthenium carbene complexes. It also analyzes the influence of fluorinated ligands on the catalytic activity of the complexes. The choice, structure and positions of fluorinated substituents in NHC ligands are generally dictated by the desire to increase the electrophilicity of the ruthenium atom due to the electron-withdrawing effect of fluorine atoms and fluoroalkyl groups, resulting, as a rule, in an increase in the activity of the ruthenium complex. In catalysts with unsymmetrical fluorine-containing NHC ligands, there is a possibility of additional Ru–F coordination, making the complexes much more stable and, consequently, more active. The presence of fluorine in chelating alkylidene ligands provides an increase in the catalyst initiation rate due to a weakening of the ruthenium – heteroatom bond. Besides, the introduction of polyfluoroalkyl groups into ligands solves the problem of catalyst recovery using fluorous biphasic systems for reuse.
The bibliography includes 172 references.
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Stathopoulou MEK, Zoupanou N, Banti CN, Douvalis AP, Papachristodoulou C, Marousis KD, Spyroulias GA, Mavromoustakos T, Hadjikakou SK. Organotin derivatives of cholic acid induce apoptosis into breast cancer cells and interfere with mitochondrion; Synthesis, characterization and biological evaluation. Steroids 2021; 167:108798. [PMID: 33472044 DOI: 10.1016/j.steroids.2021.108798] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 12/27/2020] [Accepted: 01/10/2021] [Indexed: 11/18/2022]
Abstract
Organotin(IV) derivatives of cholic acid (CAH) with the formulae R3Sn(CA) (R = Ph- (1), n-Bu- (2)) and R2Sn(CA)2 (R = Ph- (3), n-Bu- (4) and Me- (5)) were synthesized. The compounds were characterized in solid state by melting point, FT-IR, 119Sn Mössbauer, X-ray fluorescence (XRF) spectroscopy and in solution by 1H NMR, UV-Vis spectral data and by Electrospray Ionisation Mass spectrometry (ESI-MS), High Resolution Mass spectrometry (HRMS), and atomic absorption analysis. The in vitro bioactivity of 1-5 against human breast adenocarcinoma cancer cells MCF-7 (positive to hormone receptors) and MDA-MB-231 (negative to hormone receptors) reveal that triorganotin derivatives 1-2 exhibit significantly stronger activity than the corresponding diorganotin ones. Compound 5 is inactive against both cell lines at the concentrations tested. Triorganotins 1-2 inhibit selectively MCF-7 than MDA-MB-231 cells, suggesting hormone mimetic behavior of them. Organotins 1-4 inhibit both cancerous cell lines, stronger than cisplatin which rise up to 55-fold against MCF-7 and 170-fold against MDA-MB-231. The in vitro toxicity of 1-4 was evaluated on normal human fetal lung fibroblast cells (MRC-5), while their genotoxicity in vitro by micronucleus assay (MN). Moreover, the in vivo toxicity of 1-4 was tested by Artemia salina assay and their in vivo genotoxicity with Allium cepa test. The mechanism of action of 1-4 against MCF-7 was clarified in vitro by the means of cell morphology studies, cell cycle arrest, Acridine Orange/Ethidium Bromide (AO/EB) Staining, mitochondrial membrane permeabilization test and by their binding affinity toward the calf thymus (CT) DNA.
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Affiliation(s)
- M E K Stathopoulou
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - N Zoupanou
- Organic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Greece
| | - C N Banti
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece.
| | - A P Douvalis
- Mössbauer Spectroscopy and Physics of Materials Laboratory, Department of Physics, University of Ioannina, Greece; University Research Center of Ioannina (URCI), Institute of Materials Science and Computing, Ioannina, Greece
| | | | - K D Marousis
- Department of Pharmacy, University of Patras, GR 26504 Patras, Greece
| | - G A Spyroulias
- Department of Pharmacy, University of Patras, GR 26504 Patras, Greece
| | - T Mavromoustakos
- Organic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Greece.
| | - S K Hadjikakou
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece; University Research Center of Ioannina (URCI), Institute of Materials Science and Computing, Ioannina, Greece.
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Abstract
The first review article on steroid dimers by Li and Dias in 1997, followed by the second review and a book on steroid dimers by Nahar and Sarker in 2007 and 2012, respectively, covered steroid dimers reported until the end of 2010. Since then, there have been considerable amounts of research carried out on steroid dimers, prompting the need for another comprehensive review on this topic. Therefore, this present review appraises the literature published during the period 2011-2019 on various aspects of steroid dimers, including isolation from natural sources, synthesis and applications. A structured and systematic literature search was performed, using the key words: steroid dimer, steroidal dimer, dimeric steroid, bis-steroid, bis-steroidal conjugates, molecular umbrella, cephalostatins, ritterazines and crellastatins. Several databases like Web of Knowledge, Science Direct, PubMed and Google Scholar were consulted. During the period covered in this review, well over 200 new synthetic steroidal dimers, ring A-ring A connection being the major group, have been reported, only one natural steroid dimer has been isolated, and potential applications of steroid dimers in the treatment of cancers and tumors, and microbial infections have been indicated.
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Affiliation(s)
- Lutfun Nahar
- Laboratory of Growth Regulators, Institute of Experimental Botany ASCR & Palacký University, Šlechtitelů 27, 78371 Olomouc, Czech Republic.
| | - Satyajit D Sarker
- Centre for Natural Products Discovery, School of Pharmacy and Biomolecular Sciences, Faculty of Science, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool L3 3AF, United Kingdom
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Nienałtowski T, Szczepanik P, Małecki P, Czajkowska‐Szczykowska D, Czarnocki S, Pawłowska J, Kajetanowicz A, Grela K. Large‐Scale Synthesis of a Niche Olefin Metathesis Catalyst Bearing an Unsymmetrical N‐Heterocyclic Carbene (NHC) Ligand and its Application in a Green Pharmaceutical Context. Chemistry 2020; 26:15708-15717. [DOI: 10.1002/chem.202003830] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/14/2020] [Indexed: 12/17/2022]
Affiliation(s)
- Tomasz Nienałtowski
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
- Polpharma SA Pharmaceutical Works Pelplinska 19 83-200 Starogard Gdanski Poland
| | - Paweł Szczepanik
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
| | - Paweł Małecki
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
| | - Dorota Czajkowska‐Szczykowska
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
| | | | - Jolanta Pawłowska
- Polpharma SA Pharmaceutical Works Pelplinska 19 83-200 Starogard Gdanski Poland
| | - Anna Kajetanowicz
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
| | - Karol Grela
- Biological and Chemical Research Centre Faculty of Chemistry University of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
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Malinowska M, Kozlowska M, Hryniewicka A, Morzycki JW. New olefin metathesis catalyst bearing N-mesitylimidazole and nitrate ligands – Synthesis, activity, and performance in aqueous media. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.06.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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8
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Heterogeneous Catalytic Aqueous Phase Oxidative Cleavage of Styrenes to Benzaldehydes: An Environmentally Benign Alternative to Ozonolysis. Top Catal 2018. [DOI: 10.1007/s11244-018-0961-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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9
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Shen X, Liu P, Liu Y, Dai B. Synthesis of naphthyl-substituted terminal olefins via Pd-Catalyzed one-pot coupling of acetylnaphthalene, N -Tosylhydrazide with aryl halide. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.09.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yan ZD, Xing N, Zhang Y, Ma XT, Song J, Liu X, Xing YH. Oxidovanadium(IV) complexes with tridentate N-heterocycle ligands: Synthesis, structure, and efficient catalyst for cyclohexane oxidation to cyclohexanone. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.11.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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Urabe D, Asaba T, Inoue M. Convergent Strategies in Total Syntheses of Complex Terpenoids. Chem Rev 2015; 115:9207-31. [DOI: 10.1021/cr500716f] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Daisuke Urabe
- Graduate
School of Pharmaceutical
Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Taro Asaba
- Graduate
School of Pharmaceutical
Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masayuki Inoue
- Graduate
School of Pharmaceutical
Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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12
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Stability and activity of cis-dichloro ruthenium olefin metathesis precatalysts bearing chelating sulfur alkylidenes. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.06.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Sokolowska K, Sicinski RR. Synthesis of novel vitamin D3 analog with an additional ring annulated to A and seco-B rings. Steroids 2014; 87:67-75. [PMID: 24928728 DOI: 10.1016/j.steroids.2014.05.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/23/2014] [Accepted: 05/25/2014] [Indexed: 01/30/2023]
Abstract
A simple method for the synthesis of yet unknown 5E-vitamin D3 analogs with an additional six-membered ring connecting C-6 and C-19 was developed. Ring-closing metathesis (RCM) was used for efficient formation thereof from the corresponding 5E-isomers of 6-alkenyl vitamin D3 compounds which in turn were prepared from the 6-oxo-3,5-cyclovitamin D3. Reinvestigation of the Grignard reactions of this latter compound as well as the following acid-catalyzed cycloreversions showed discrepancies with the literature data describing the course of such processes.
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Affiliation(s)
- Katarzyna Sokolowska
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Rafal R Sicinski
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland.
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Ganapathy D, Sekar G. Efficient synthesis of polysubstituted olefins using stable palladium nanocatalyst: applications in synthesis of tamoxifen and isocombretastatin A4. Org Lett 2014; 16:3856-9. [PMID: 25036297 DOI: 10.1021/ol5017367] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A phosphine-free stable palladium nanocatalyst was used for an efficient synthesis of polysubstituted olefins from N-tosylhydrazones and aryl iodides. This methodology was successfully utilized in the synthesis of biologically important tamoxifen and isocombretastatin A4. The nanocatalyst was easily recovered and reused without any apparent loss in size and catalytic activity.
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Affiliation(s)
- Dhandapani Ganapathy
- Department of Chemistry, Indian Institute of Technology Madras , Chennai, Tamil Nadu 600036, India
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15
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King M, Wagner A. Developments in the Field of Bioorthogonal Bond Forming Reactions—Past and Present Trends. Bioconjug Chem 2014; 25:825-39. [DOI: 10.1021/bc500028d] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Mathias King
- Laboratory of Functional
Chemo-Systems (UMR 7199), Labex Medalis, University of Strasbourg - CNRS, 74 Route du Rhin, BP 60024, 67401 Illkirch-Graffenstaden, France
| | - Alain Wagner
- Laboratory of Functional
Chemo-Systems (UMR 7199), Labex Medalis, University of Strasbourg - CNRS, 74 Route du Rhin, BP 60024, 67401 Illkirch-Graffenstaden, France
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Jhuo DH, Hong BC, Chang CW, Lee GH. One-Pot Organocatalytic Enantioselective Michael–Michael–Aldol–Henry Reaction Cascade. A Facile Entry to the Steroid System with Six Contiguous Stereogenic Centers. Org Lett 2014; 16:2724-7. [DOI: 10.1021/ol501011t] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Dai-Huei Jhuo
- Department
of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi, 621, Taiwan R.O.C
| | - Bor-Cherng Hong
- Department
of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi, 621, Taiwan R.O.C
| | - Chun-Wei Chang
- Department
of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi, 621, Taiwan R.O.C
| | - Gene-Hsiang Lee
- Instrumentation
Center, National Taiwan University, Taipei, 106, Taiwan, R.O.C
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17
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2011. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2013.05.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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18
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Thiel V, Wannowius KJ, Wolff C, Thiele CM, Plenio H. Ring-Closing Metathesis Reactions: Interpretation of Conversion-Time Data. Chemistry 2013; 19:16403-14. [DOI: 10.1002/chem.201204150] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 08/07/2013] [Indexed: 11/06/2022]
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19
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Ibrahim-Ouali M, Romero E. Synthesis of various secosteroidal macrocycles by ring-closing metathesis. Steroids 2013; 78:651-61. [PMID: 23583599 DOI: 10.1016/j.steroids.2013.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 03/05/2013] [Accepted: 03/23/2013] [Indexed: 11/20/2022]
Abstract
We set out to describe an efficient and versatile method for preparing secosteroidal macrocycles from cholic acid, via an oxidative ring-expansion/ring-opening sequence and a ring-closing metathesis reaction as the key steps. The characteristic ¹H and ¹³C NMR spectroscopic features of the synthesized compounds are reported.
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Affiliation(s)
- Malika Ibrahim-Ouali
- CNRS Institut des Sciences Moléculaires de Marseille UMR 7313, Aix Marseille Université, 13397 Marseille, France.
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Fast Olefin Metathesis: Synthesis of 2-Aryloxy-Substituted Hoveyda-Type Complexes and Application in Ring-Closing Metathesis. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201200956] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Czajkowska-Szczykowska D, Rodríguez-Molina B, Magaña-Vergara NE, Santillan R, Morzycki JW, Garcia-Garibay MA. Macrocyclic Molecular Rotors with Bridged Steroidal Frameworks. J Org Chem 2012; 77:9970-8. [DOI: 10.1021/jo3020402] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
| | - Braulio Rodríguez-Molina
- Department of Chemistry and
Biochemistry, University of California,
Los Angeles, California 90095, United States
| | - Nancy E. Magaña-Vergara
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN, México D.F. Apdo. Postal 14-740, 07000 Mexico
| | - Rosa Santillan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN, México D.F. Apdo. Postal 14-740, 07000 Mexico
| | - Jacek W. Morzycki
- Institute of Chemistry, University of Białystok, Piłsudskiego 11/4,
15-443 Białystok, Poland
| | - Miguel A. Garcia-Garibay
- Department of Chemistry and
Biochemistry, University of California,
Los Angeles, California 90095, United States
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A cross-metathesis approach to the synthesis of new etretinate type retinoids, ethyl retinoate and its 9Z-isomer. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.07.122] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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24
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Vougioukalakis GC. Removing Ruthenium Residues from Olefin Metathesis Reaction Products. Chemistry 2012; 18:8868-80. [DOI: 10.1002/chem.201200600] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Vyas Devambatla RK, Velagaleti R, Yarravarapu N, Fleming FF. SNi′ displacements with main group organometallics. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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26
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Ibrahim-Ouali M, Bouleghlem H, Aouf NE. Ring-closing metathesis towards functionalised pentacyclic steroids. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.02.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Thiel V, Hendann M, Wannowius KJ, Plenio H. On the Mechanism of the Initiation Reaction in Grubbs–Hoveyda Complexes. J Am Chem Soc 2011; 134:1104-14. [DOI: 10.1021/ja208967h] [Citation(s) in RCA: 138] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Vasco Thiel
- Organometallic Chemistry, FB Chemie, Petersenstr. 18, 64287 Darmstadt, TU Darmstadt, Germany
| | - Marina Hendann
- Organometallic Chemistry, FB Chemie, Petersenstr. 18, 64287 Darmstadt, TU Darmstadt, Germany
| | - Klaus-Jürgen Wannowius
- Organometallic Chemistry, FB Chemie, Petersenstr. 18, 64287 Darmstadt, TU Darmstadt, Germany
| | - Herbert Plenio
- Organometallic Chemistry, FB Chemie, Petersenstr. 18, 64287 Darmstadt, TU Darmstadt, Germany
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28
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Wojtkielewicz A, Maj J, Dzieszkowska A, Morzycki JW. Cross metathesis approach to retinoids and other β-apocarotenoids. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.06.086] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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