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Hirasawa S, Masuda T, Mukai K, Miyoshi Y, Kanomata N. Asymmetric synthesis of (-)-dehydro- exo-brevicomin with a photoisomerisation-intramolecular acetalisation sequence. Org Biomol Chem 2021; 19:6897-6903. [PMID: 34328158 DOI: 10.1039/d1ob00952d] [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
We herein report a novel, short asymmetric synthesis of (-)-dehydro-exo-brevicomin (DHB, 1), a sex pheromone isolated from house mice, in 44% overall yield, the highest yield reported so far, over eight steps from trans-3-hexen-1-ol (7). We successfully prepared the target molecule (-)-1 from spontaneous intramolecular acetalisation after the photoisomerisation of trans-enone 6, which generated the corresponding cis-enone 5in situ, the possible biosynthetic precursor of DHB.
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Affiliation(s)
- Shun Hirasawa
- Department of Chemistry and Biochemistry, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
| | - Tsuyoshi Masuda
- Department of Chemistry and Biochemistry, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
| | - Ken Mukai
- Department of Chemistry and Biochemistry, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
| | - Yusuke Miyoshi
- Department of Chemistry and Biochemistry, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
| | - Nobuhiro Kanomata
- Department of Chemistry and Biochemistry, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
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Rossi-Fernández L, Dorn V, Radivoy G. A new and efficient methodology for olefin epoxidation catalyzed by supported cobalt nanoparticles. Beilstein J Org Chem 2021; 17:519-526. [PMID: 33727975 PMCID: PMC7934735 DOI: 10.3762/bjoc.17.46] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 02/10/2021] [Indexed: 12/22/2022] Open
Abstract
A new heterogeneous catalytic system consisting of cobalt nanoparticles (CoNPs) supported on MgO and tert-butyl hydroperoxide (TBHP) as oxidant is presented. This CoNPs@MgO/t-BuOOH catalytic combination allowed the epoxidation of a variety of olefins with good to excellent yield and high selectivity. The catalyst preparation is simple and straightforward from commercially available starting materials and it could be recovered and reused maintaining its unaltered high activity.
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Affiliation(s)
- Lucía Rossi-Fernández
- INQUISUR-CONICET, Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, Bahía Blanca, B8000CPB, Argentina
| | - Viviana Dorn
- INQUISUR-CONICET, Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, Bahía Blanca, B8000CPB, Argentina
| | - Gabriel Radivoy
- INQUISUR-CONICET, Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, Bahía Blanca, B8000CPB, Argentina
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3
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Lopez S, Mayes DM, Crouzy S, Cavazza C, Leprêtre C, Moreau Y, Burzlaff N, Marchi-Delapierre C, Ménage S. A Mechanistic Rationale Approach Revealed the Unexpected Chemoselectivity of an Artificial Ru-Dependent Oxidase: A Dual Experimental/Theoretical Approach. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04904] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Sarah Lopez
- Univ. Grenoble-Alpes, CEA, CNRS, IRIG, CBM, F-38000 Grenoble, France
- Univ. Grenoble-Alpes, DCM-SeRCO, F-38000 Grenoble, France
| | | | - Serge Crouzy
- Univ. Grenoble-Alpes, CEA, CNRS, IRIG, CBM, F-38000 Grenoble, France
| | - Christine Cavazza
- Univ. Grenoble-Alpes, CEA, CNRS, IRIG, CBM, F-38000 Grenoble, France
| | - Chloé Leprêtre
- Univ. Grenoble-Alpes, CEA, CNRS, IRIG, CBM, F-38000 Grenoble, France
| | - Yohann Moreau
- Univ. Grenoble-Alpes, CEA, CNRS, IRIG, CBM, F-38000 Grenoble, France
| | - Nicolai Burzlaff
- Department of Chemistry and Pharmacy, Friedrich-Alexander-University of Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | | | - Stéphane Ménage
- Univ. Grenoble-Alpes, CEA, CNRS, IRIG, CBM, F-38000 Grenoble, France
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Kazemnejadi M, Mahmoudi B, Sharafi Z, Nasseri MA, Allahresani A, Esmaeilpour M. Synthesis and characterization of a new poly α-amino acid Co(II)-complex supported on magnetite graphene oxide as an efficient heterogeneous magnetically recyclable catalyst for efficient free-coreductant gram-scale epoxidation of olefins with molecular oxygen. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.05.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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5
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Yi X, Liu B, Chen K, Chen W, Chen W. Unbridged Rh(ii)–Rh(ii) complexes of N-heterocyclic carbenes and reactions with O2 to form dirhodium(μ–η1:η1-O2) complexes. Dalton Trans 2019; 48:3835-3839. [DOI: 10.1039/c9dt00421a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Dimeric rhodium(ii) [Rh(L)(CH3CN)]2(PF6)4 and rhodium(iii) peroxide [Rh(L)(PPh3)]2(μ–η1:η1-O2)(PF6)4 and [Rh(L)(PCy3)]2(μ–η1:η1-O2)(PF6)4 (L = bis(N-pyridylimidazolylidenyl)methane) were reported.
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Affiliation(s)
- Xiaofei Yi
- Department of Chemistry
- Zhejiang University
- Hangzhou 310007
- China
| | - Bin Liu
- Zhejiang Province Key Laboratory of Noble Metal Catalytic Materials and Technology
- Hangzhou
- China
| | - Kai Chen
- Department of Chemistry
- Zhejiang University
- Hangzhou 310007
- China
| | - Wei Chen
- Department of Chemistry
- Zhejiang University
- Hangzhou 310007
- China
| | - Wanzhi Chen
- Department of Chemistry
- Zhejiang University
- Hangzhou 310007
- China
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