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Thangavel M, Chin SY. Valorization of palm oil via cross-metathesis reaction using 1-octene. CHEM ENG COMMUN 2022. [DOI: 10.1080/00986445.2022.2111555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- M. Thangavel
- Department of Chemical Engineering, College of Engineering, University Malaysia Pahang, Gambang, Malaysia
| | - S. Y. Chin
- Department of Chemical Engineering, College of Engineering, University Malaysia Pahang, Gambang, Malaysia
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2
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Angelucci F, Cirillo D, Bjørsvik HR. Imidazole backbone functionalization with olefin crossmetathesis. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Francesco Angelucci
- University of Bergen: Universitetet i Bergen Department of Chemistry Allégaten 41 N-5007 Bergen NORWAY
| | - Davide Cirillo
- University of Bergen: Universitetet i Bergen Department of Chemistry Allégaten 41 N-5007 Bergen NORWAY
| | - Hans-René Bjørsvik
- University of Bergen Department of Chemistry Allegaten 41 N-5007 Bergen NORWAY
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Evaluation of Catalysts for the Metathesis of Ethene and 2-Butene to Propene. Catalysts 2022. [DOI: 10.3390/catal12020188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Different metathesis catalysts were evaluated regarding their activity for propene production from ethene and trans-butene feedstocks. Nickel, molybdenum, rhenium and tungsten, along with bimetallic nickel-rhenium systems were applied with commercial supports and self-synthesized MCM-41. For the latter support the Si/Al ratio was adjusted as an additional optimization parameter (Si/Al = 60). Attractive activities were observed using Re and NiRe based catalysts at moderate temperatures of 200–250 °C. In contrast, the tungsten-based catalysts were only active above 450 °C. Three catalysts, namely Re/AlMCM-41(60), NiRe/mix (1:1) and W/SiO2 offered propene selectivity’s exceeding 40% at attractive conversion rates. These catalysts were characterized by BET, powder XRD, NH3-TPD and TPR-TPO-TPR cycles. At specific reaction temperatures, reaction-regeneration cycles were performed, which revealed that for the Re and W catalysts the initial reactant conversions and propene selectivity can be recovered. In contrast, for the NiRe catalyst, a continuous, gradual and irreversible decrease of activity was observed. Even though the tungsten catalyst was operated at the highest temperature, no irreversible decrease in conversion and propene selectivity occurred. Therefore, this catalyst has potential as a promising candidate for the synthesis of propene.
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Nascimento DL, Reim I, Foscato M, Jensen VR, Fogg DE. Challenging Metathesis Catalysts with Nucleophiles and Brønsted Base: Examining the Stability of State-of-the-Art Ruthenium Carbene Catalysts to Attack by Amines. ACS Catal 2020; 10:11623-11633. [PMID: 33123412 PMCID: PMC7587145 DOI: 10.1021/acscatal.0c02760] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/29/2020] [Indexed: 11/29/2022]
Abstract
Critical to advancing the uptake of olefin metathesis in leading contexts, including pharmaceutical manufacturing, is identification of highly active catalysts that resist decomposition. Amines constitute an aggressive challenge to ruthenium metathesis catalysts. Examined here is the impact of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), morpholine, n-butylamine, and triethylamine on Ru metathesis catalysts that represent the current state of the art, including cyclic alkyl amino carbene (CAAC) and N-heterocyclic carbene (NHC) complexes. Accordingly, the amine-tolerance of the nitro-Grela catalyst RuCl2(H2IMes)(=CHAr) (nG; Ar = C6H4-2-O i Pr-5-NO2) is compared with that of its CAAC analogues nGC1 and nGC2, and the Hoveyda-class catalyst RuCl2(C2)(=CHAr') HC2 (Ar' = C6H4-2-O i Pr). In C1, the carbene carbon is flanked by an N-2,6-Et2C6H3 group and a CMePh quaternary carbon; in C2, by an N-2- i Pr-6-MeC6H3 group and a CMe2 quaternary carbon. The impact of 1 equiv amine per Ru on turnover numbers (TONs) in ring-closing metathesis of diethyl diallylmalonate was assessed at 9 ppm Ru, at RT and 70 °C. The deleterious impact of amines followed the trend NEt3 ∼ NH2 n Bu ≪ DBU ∼ morpholine. Morpholine is shown to decompose nGC1 by nucleophilic abstraction of the methylidene ligand; DBU, by proton abstraction from the metallacyclobutane. Decomposition was minimized at 70 °C, at which nGC1 enabled TONs of ca. 60 000 even in the presence of morpholine or DBU, vs ca. 80 000 in the absence of base. Unexpectedly, H2IMes catalyst nG delivered 70-90% of the performance of nGC1 at high temperatures, and underwent decomposition by Brønsted base at a similar rate. Density functional theory (DFT) analysis shows that this similarity is due to comparable net electron donation by the H2IMes and C1 ligands. Catalysts bearing the smaller C2 ligand were comparatively insensitive to amines, owing to rapid, preferential bimolecular decomposition.
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Affiliation(s)
- Daniel L. Nascimento
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Immanuel Reim
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Marco Foscato
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Vidar R. Jensen
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
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Maiti S, Leonardi M, Cores Á, Tenti G, Ramos MT, Villacampa M, Menéndez JC. Synthesis of 1,4-Diazepanes and Benzo[ b][1,4]diazepines by a Domino Process Involving the In Situ Generation of an Aza-Nazarov Reagent. J Org Chem 2020; 85:11924-11933. [DOI: 10.1021/acs.joc.0c01774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Swarupananda Maiti
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - Marco Leonardi
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - Ángel Cores
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - Giammarco Tenti
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - M. Teresa Ramos
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - Mercedes Villacampa
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - J. Carlos Menéndez
- Unidad de Quı́mica Orgánica y Farmacéutica, Departamento de Quı́mica en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
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Vale JR, Valkonen A, Afonso CAM, Candeias NR. Synthesis of silacyclopent-2-en-4-ols via intramolecular [2 + 2] photocycloaddition of benzoyl(allyl)silanes. Org Chem Front 2019. [DOI: 10.1039/c9qo01028a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Organosilicon compounds are versatile units with a wide range of uses from medicinal chemistry to the field of organic electronics.
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Affiliation(s)
- João R. Vale
- Faculty of Engineering and Natural sciences
- Tampere University
- 33101 Tampere
- Finland
- Instituto de Investigação do Medicamento (iMed.ULisboa)
| | - Arto Valkonen
- Department of Chemistry
- University of Jyvaskyla
- 40014 Jyväskylä
- Finland
| | - Carlos A. M. Afonso
- Instituto de Investigação do Medicamento (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- 1649-003 Lisboa
- Portugal
| | - Nuno R. Candeias
- Faculty of Engineering and Natural sciences
- Tampere University
- 33101 Tampere
- Finland
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Mulet C, Escolano M, Llopis S, Sanz S, Ramírez de Arellano C, Sánchez-Roselló M, Fustero S, del Pozo C. Dual Role of Vinyl Sulfonamides as N
-Nucleophiles and Michael Acceptors in the Enantioselective Synthesis of Bicyclic δ-Sultams. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800548] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Cristina Mulet
- Departamento de Química Orgánica; Universidad de Valencia, E-; 46100 Burjassot Spain
| | - Marcos Escolano
- Departamento de Química Orgánica; Universidad de Valencia, E-; 46100 Burjassot Spain
| | - Sebastián Llopis
- Departamento de Química Orgánica; Universidad de Valencia, E-; 46100 Burjassot Spain
| | - Sergio Sanz
- Departamento de Química Orgánica; Universidad de Valencia, E-; 46100 Burjassot Spain
| | | | - María Sánchez-Roselló
- Departamento de Química Orgánica; Universidad de Valencia, E-; 46100 Burjassot Spain
| | - Santos Fustero
- Departamento de Química Orgánica; Universidad de Valencia, E-; 46100 Burjassot Spain
- Laboratorio de Moléculas Orgánicas; Centro de Investigación Príncipe Felipe, E-; 46012 Valencia Spain
| | - Carlos del Pozo
- Departamento de Química Orgánica; Universidad de Valencia, E-; 46100 Burjassot Spain
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Sayyad AA, Kaliappan KP. Sequential Enyne-Metathesis/Diels-Alder Strategy: Rapid Access to Sugar-Oxasteroid-Quinone Hybrids. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700599] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Ashik A. Sayyad
- Department of Chemistry; Indian Institute of Technology Bombay; 400076 Mumbai India
| | - Krishna P. Kaliappan
- Department of Chemistry; Indian Institute of Technology Bombay; 400076 Mumbai India
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Chołuj A, Nikishkin NI, Chmielewski MJ. Facile post-synthetic deamination of MOFs and the synthesis of the missing parent compound of the MIL-101 family. Chem Commun (Camb) 2017; 53:10196-10199. [PMID: 28856365 DOI: 10.1039/c7cc06054h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A versatile method for the post-synthetic removal of primary amino groups from metal-organic frameworks (MOFs) has been developed. The method allowed the first successful synthesis of the missing parent compound of an important family of MOFs - the unsubstituted (Al)MIL-101. The material was shown to be a useful reference compound for the elucidation of the role of amino groups in the adsorption and deactivation of olefin metathesis catalysts. The chemoselectivity of the deamination is sufficient for the selective removal of NH2 substituents from mixed-linker MOFs bearing both NH2 and RCONH groups.
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Affiliation(s)
- Artur Chołuj
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland.
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Hasib-ur-Rahman M, Hamoudi S, Belkacemi K. Heterogeneous olefin-metathesis: Comparative perspective of the activity with respect to unsaturated fatty acid methyl esters. CAN J CHEM ENG 2017. [DOI: 10.1002/cjce.22845] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Muhammad Hasib-ur-Rahman
- Department of Soil Sciences and Food Engineering; Université Laval, Quebec; QC G1V 0A6 Canada
- Centre in Green Chemistry and Catalysis (CGCC); Université Laval, Quebec; QC G1V 0A6 Canada
| | - Safia Hamoudi
- Department of Soil Sciences and Food Engineering; Université Laval, Quebec; QC G1V 0A6 Canada
- Centre in Green Chemistry and Catalysis (CGCC); Université Laval, Quebec; QC G1V 0A6 Canada
| | - Khaled Belkacemi
- Department of Soil Sciences and Food Engineering; Université Laval, Quebec; QC G1V 0A6 Canada
- Centre in Green Chemistry and Catalysis (CGCC); Université Laval, Quebec; QC G1V 0A6 Canada
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2015. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Synthesis of (2S,3R,4R)-3,4-dihydroxyarginine and its inhibitory activity against nitric oxide synthase. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.07.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kotha S, Ravikumar O. Synthesis of fused azacycle via Overman rearrangement and ring-rearrangement metathesis as key steps. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.03.087] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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