1
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Colombier M, Ukstins IA, Tegtmeier S, Scheu B, Cronin SJ, Thivet S, Paredes-Mariño J, Cimarelli C, Hess KU, Kula T, Latu'ila FH, Dingwell DB. Atmosphere injection of sea salts during large explosive submarine volcanic eruptions. Sci Rep 2023; 13:14435. [PMID: 37660204 PMCID: PMC10475066 DOI: 10.1038/s41598-023-41639-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 08/29/2023] [Indexed: 09/04/2023] Open
Abstract
The 15 January 2022 submarine eruption at Hunga volcano was the most explosive volcanic eruption in 140 years. It involved exceptional magma and seawater interaction throughout the entire submarine caldera collapse. The submarine volcanic jet breached the sea surface and formed a subaerial eruptive plume that transported volcanic ash, gas, sea salts and seawater up to ~ 57 km, reaching into the mesosphere. We document high concentrations of sea salts in tephra (volcanic ash) collected shortly after deposition. We also discuss the potential climatic consequences of large-scale injection of salts into the upper atmosphere during submarine eruptions. Sodium chloride in these volcanic plumes can reach extreme concentrations, and dehalogenation of chlorides and bromides poses the risk of long-term atmospheric and weather impact. Salt content in rapidly collected tephra samples may also be used as a proxy to estimate the water:magma ratio during eruption, with implications for quantification of fragmentation efficiency in submarine breaching events. The balance between salt loading into the atmosphere versus deposition in ash aggregates is a key factor in understanding the atmospheric and climatic consequences of submarine eruptions.
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Affiliation(s)
- M Colombier
- Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, Munich, Germany.
| | - I A Ukstins
- School of Environment, University of Auckland, Auckland, New Zealand
| | - S Tegtmeier
- University of Saskatchewan, Institute of Space and Atmospheric Studies, Saskatoon, SK, S7N 5E2, Canada
| | - B Scheu
- Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, Munich, Germany
| | - S J Cronin
- School of Environment, University of Auckland, Auckland, New Zealand
| | - S Thivet
- Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, Munich, Germany
- Department of Earth Sciences, University of Geneva, Geneva, Switzerland
| | - J Paredes-Mariño
- School of Environment, University of Auckland, Auckland, New Zealand
| | - C Cimarelli
- Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, Munich, Germany
| | - K-U Hess
- Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, Munich, Germany
| | | | | | - D B Dingwell
- Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, Munich, Germany
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2
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Cimarelli C, BACCHIOCCHI C, Petroselli M, Lippolis M, Gentili D, Gabrielli S. Diastereoselective synthesis of secondary propargylamines exploiting CuI-based promoters and determination of their relative configuration by DFT-GIAO conformational analysis. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1990-4867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
The stereoselective synthesis of several secondary propargylamines by copper promoted A3 coupling reaction of aliphatic and aromatic aldehydes with phenylacetylene and (R)-(+)-phenylethylamine, is here reported. Two different synthetic methodologies have been investigated in this study involving the CuSO4/NaI or CeCl3ꞏ7H2O/CuI promoting systems. The reported methodologies were compared in terms of efficiency, diastereoselectivity and toxicity, both showing advantages with respect to the current methodologies. The absolute relative configurations of each of the obtained propargylamines, previously unknown in the literature, were attributed by comparison of the 1H-NMR experimental chemical shifts with those theoretically predicted via the DFT-GIAO method.
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Affiliation(s)
- Cristina Cimarelli
- Chemistry Division, Universita degli Studi di Camerino Scuola di Scienze e Tecnologie, Camerino, Italy
| | - Corrado BACCHIOCCHI
- Chemistry Division, University of Camerino School of Science and Technology, Camerino, Italy
| | | | - Martina Lippolis
- Chemistry Division, University of Camerino School of Science and Technology, Camerino, Italy
| | - Dario Gentili
- Chemistry Division, University of Camerino School of Science and Technology, Camerino, Italy
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3
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Pellei M, Bagnarelli L, Gabrielli S, Lupidi G, Cimarelli C, Stella F, Dolmella A, Santini C. Copper(II) complexes based on isopropyl ester derivatives of bis(pyrazol-1-yl)acetate ligands with catalytic potency in organic macro(molecules) synthesis. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2022]
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4
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Pastore G, Gabrielli S, Cecchi T, Giuliani A, Cimarelli C, Menchi A, Marcantoni E. A new and efficient lactic acid polymerization by multimetallic cerium complexes: a poly(lactic acid) suitable for biomedical applications. RSC Adv 2021; 11:10592-10598. [PMID: 35423540 PMCID: PMC8695714 DOI: 10.1039/d0ra10637b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 03/04/2021] [Indexed: 12/25/2022] Open
Abstract
Among many, poly(lactic acid) (PLA) has received significant consideration. The striking price and accessibility of l-lactic acid, as a naturally occurring organic acid, are important reasons for poly-(l)-lactic acid (PLLA) improvement. PLLA is a compostable and biocompatible/bioresorbable polymer used for disposable products, for biomedical applications, for packaging film, in the automotive industry, for electronic device components, and for many other applications. Formerly, titanium and other metals have been used in different orthopaedic screws and plates, but they are not degradable and therefore remain in the body. So, the development of innovative and eco compatible catalysts for polyester synthesis is of great interest. In this study, an innovative and eco sustainable catalyst was employed for PLLA synthesis. The combined CeCl3·7H2O-NaI system has been demonstrated to be a very valuable and nontoxic catalyst toward PLLA synthesis, and it represents a further example of how to exploit the antibacterial properties of cerium ions in biomaterials engineering. A novel synthesis of poly-(l)-lactic acid was developed in high yields up to 95% conversion and with a truly valuable molecular weight ranging from 9000 to 145 000 g mol-1, testing different synthetic routes.
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Affiliation(s)
- Genny Pastore
- University of Camerino, School of Science and Technology, Organic Chemistry Division Via S. Agostino n.1 62032 Camerino Macerata Italy
| | - Serena Gabrielli
- University of Camerino, School of Science and Technology, Organic Chemistry Division Via S. Agostino n.1 62032 Camerino Macerata Italy
| | - Teresa Cecchi
- Technical Institute Superior, ITT G. e M. Montani of Fermo Via Girolamo Montani n.7 63900 Fermo Italy
| | - Arianna Giuliani
- Technical Institute Superior, ITT G. e M. Montani of Fermo Via Girolamo Montani n.7 63900 Fermo Italy
| | - Cristina Cimarelli
- University of Camerino, School of Science and Technology, Organic Chemistry Division Via S. Agostino n.1 62032 Camerino Macerata Italy
| | - Alessandro Menchi
- University of Camerino, School of Science and Technology, Organic Chemistry Division Via S. Agostino n.1 62032 Camerino Macerata Italy
| | - Enrico Marcantoni
- University of Camerino, School of Science and Technology, Organic Chemistry Division Via S. Agostino n.1 62032 Camerino Macerata Italy
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5
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Buonanno F, Catalani E, Cervia D, Cimarelli C, Marcantoni E, Ortenzi C. Natural Function and Structural Modification of Climacostol, a Ciliate Secondary Metabolite. Microorganisms 2020; 8:E809. [PMID: 32471240 PMCID: PMC7356801 DOI: 10.3390/microorganisms8060809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 05/25/2020] [Indexed: 11/16/2022] Open
Abstract
The review highlights the main results of two decades of research on climacostol (5-[(2Z)-non-2-en-1-yl]benzene-1,3-diol), the resorcinolic lipid produced and used by the ciliated protozoan Climacostomum virens for chemical defense against a wide range of predators, and to assist its carnivorous feeding. After the first studies on the physiological function of climacostol, the compound and some analogues were chemically synthesized, thus allowing us to explore both its effect on different prokaryotic and eukaryotic biological systems, and the role of its relevant structural traits. In particular, the results obtained in the last 10 years indicate climacostol is an effective antimicrobial and anticancer agent, bringing new clues to the attempt to design and synthesize additional novel analogues that can increase or optimize its pharmacological properties.
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Affiliation(s)
- Federico Buonanno
- Laboratory of Protistology and Biology Education, Department of Education, Cultural Heritage, and Tourism (ECHT), Università degli Studi di Macerata, 62100 Macerata, Italy;
| | - Elisabetta Catalani
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, 01100 Viterbo, Italy; (E.C.); (D.C.)
| | - Davide Cervia
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, 01100 Viterbo, Italy; (E.C.); (D.C.)
| | - Cristina Cimarelli
- School of Science and Technology, Section of Chemistry, Università degli Studi di Camerino, 62032 Camerino, Italy; (C.C.); (E.M.)
| | - Enrico Marcantoni
- School of Science and Technology, Section of Chemistry, Università degli Studi di Camerino, 62032 Camerino, Italy; (C.C.); (E.M.)
| | - Claudio Ortenzi
- Laboratory of Protistology and Biology Education, Department of Education, Cultural Heritage, and Tourism (ECHT), Università degli Studi di Macerata, 62100 Macerata, Italy;
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6
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Prata AT, Folch A, Prata AJ, Biondi R, Brenot H, Cimarelli C, Corradini S, Lapierre J, Costa A. Author Correction: Anak Krakatau triggers volcanic freezer in the upper troposphere. Sci Rep 2020; 10:7279. [PMID: 32332874 PMCID: PMC7181661 DOI: 10.1038/s41598-020-64152-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- A T Prata
- Barcelona Supercomputing Center, Computer Applications in Science and Engineering, Barcelona, Spain.
| | - A Folch
- Barcelona Supercomputing Center, Computer Applications in Science and Engineering, Barcelona, Spain
| | - A J Prata
- AIRES Pty. Ltd., Mt Eliza, Victoria, Australia.,Visiting Professor, School of Electrical Engineering, Computing and Mathematical Sciences, Curtin University, Perth, Australia
| | - R Biondi
- Università degli Studi di Padova, Dipartimento di Geoscienze, Padua, Italy
| | - H Brenot
- Royal Belgian Institute for Space Aeronomy, Brussels, Belgium
| | - C Cimarelli
- Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität, München, Germany
| | - S Corradini
- Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Nazionale Terremoti, Rome, Italy
| | - J Lapierre
- Earth Networks Inc., Germantown, MD, United States
| | - A Costa
- Istituto Nazionale di Geofisica e Vulcanologia Sezione di Bologna, Bologna, Italy
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7
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Abstract
Multicomponent Reactions appear to be ideal for any form of synthesis, because of their numerous advantages in terms of sustainability and selectivity in building up complex molecular architectures, with high molecular diversity. This Special Issue collects seven contributions which expand our knowledge about Multicomponent Reactions, providing a good overview about innovative reactivities and applications.
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Affiliation(s)
- Cristina Cimarelli
- School of Sciences and Technology, Chemistry Division, University of Camerino, Via S. Agostino 1, 62032 Camerino (MC), Italy.
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8
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Morelli MB, Amantini C, Nabissi M, Santoni G, Wünsch B, Schepmann D, Cimarelli C, Pellei M, Santini C, Fontana S, Mammoli V, Quaglia W, Bonifazi A, Giannella M, Giorgioni G, Piergentili A, Del Bello F. Role of the NMDA Receptor in the Antitumor Activity of Chiral 1,4-Dioxane Ligands in MCF-7 and SKBR3 Breast Cancer Cells. ACS Med Chem Lett 2019; 10:511-516. [PMID: 30996788 DOI: 10.1021/acsmedchemlett.8b00536] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 01/28/2019] [Indexed: 12/18/2022] Open
Abstract
The potent N-methyl-d-aspartate (NMDA) receptor antagonists 1-3 have been demonstrated to show antiproliferative and cytotoxic effects in MCF-7 and SKBR3 breast cancer cell lines. To improve the knowledge about the role played by the NMDA receptor in the antitumor activity of these compounds, the enantiomers of 1 were prepared and evaluated for their affinity for the phencyclidine (PCP) site of the NMDA receptor and for their cytotoxic effect in MCF-7 and SKBR3 cell lines, both expressing the NMDA receptor. The (S)-1 enantiomer, showing negligible affinity for the PCP site, exhibited antiproliferative activity higher than that of (R)-1, which instead bound the PCP site. The downregulation of NMDA GluN1 expression resulted in a decreased (S)-1-induced cytotoxicity and apoptotic cell death, unequivocally demonstrating the involvement of the NMDA receptor in the antitumor effect of this compound. Due to its interesting biological profile, (S)-1 represents a lead compound to develop novel antitumor agents for breast cancer treatment.
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Affiliation(s)
- Maria Beatrice Morelli
- School of Biosciences and Veterinary Medicine, University of Camerino, via Madonna delle Carceri 9, 62032 Camerino, Italy
- School of Pharmacy, Immunopathology Unit, University of Camerino, via Madonna delle Carceri 9, 62032 Camerino, Italy
| | - Consuelo Amantini
- School of Biosciences and Veterinary Medicine, University of Camerino, via Madonna delle Carceri 9, 62032 Camerino, Italy
| | - Massimo Nabissi
- School of Pharmacy, Immunopathology Unit, University of Camerino, via Madonna delle Carceri 9, 62032 Camerino, Italy
| | - Giorgio Santoni
- School of Pharmacy, Immunopathology Unit, University of Camerino, via Madonna delle Carceri 9, 62032 Camerino, Italy
| | - Bernhard Wünsch
- Institut für Pharmazeutische und Medizinische Chemie, Universität Münster, Corrensstraße 48, 48149 Münster, Germany
| | - Dirk Schepmann
- Institut für Pharmazeutische und Medizinische Chemie, Universität Münster, Corrensstraße 48, 48149 Münster, Germany
| | - Cristina Cimarelli
- School of Science and Technology, University of Camerino, via S. Agostino 1, 62032 Camerino, Italy
| | - Maura Pellei
- School of Science and Technology, University of Camerino, via S. Agostino 1, 62032 Camerino, Italy
| | - Carlo Santini
- School of Science and Technology, University of Camerino, via S. Agostino 1, 62032 Camerino, Italy
| | - Stefano Fontana
- Center for Drug Discovery and Development-DMPK, Aptuit, an Evotec Company, via A. Fleming 4, 37135 Verona, Italy
| | - Valerio Mammoli
- Center for Drug Discovery and Development-DMPK, Aptuit, an Evotec Company, via A. Fleming 4, 37135 Verona, Italy
| | - Wilma Quaglia
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, via S. Agostino 1, 62032 Camerino, Italy
| | - Alessandro Bonifazi
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, via S. Agostino 1, 62032 Camerino, Italy
| | - Mario Giannella
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, via S. Agostino 1, 62032 Camerino, Italy
| | - Gianfabio Giorgioni
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, via S. Agostino 1, 62032 Camerino, Italy
| | - Alessandro Piergentili
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, via S. Agostino 1, 62032 Camerino, Italy
| | - Fabio Del Bello
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, via S. Agostino 1, 62032 Camerino, Italy
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9
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Cimarelli C, Navazio F, Rossi F, Del Bello F, Marcantoni E. Activation of Primary Amines by Copper(I)-Based Lewis Acid Promoters in the Solventless Synthesis of Secondary Propargylamines. SYNTHESIS-STUTTGART 2019. [DOI: 10.1055/s-0037-1612253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Primary amines are activated by copper(I)-based Lewis acid promoters in an A3-coupling one-pot solventless reaction with aldehydes and phenylacetylene for the synthesis of secondary propargylamines. The reaction is promoted by a CuSO4/NaI system, a practical precursor of the in situ generated effective CuI/I2 system, that worked well, but only in a restricted number of examples. Substitution of I2 with CeCl3·7H2O in a one-pot two-step reaction provided good yields and a wider applicability, with the added value given by a safer procedure.
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Affiliation(s)
- Cristina Cimarelli
- School of Science and Technology, Chemistry Division, University of Camerino
| | - Federica Navazio
- School of Science and Technology, Chemistry Division, University of Camerino
| | - Federico Rossi
- School of Science and Technology, Chemistry Division, University of Camerino
| | - Fabio Del Bello
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino
| | - Enrico Marcantoni
- School of Science and Technology, Chemistry Division, University of Camerino
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10
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Pellei M, Gandin V, Cimarelli C, Quaglia W, Mosca N, Bagnarelli L, Marzano C, Santini C. Syntheses and biological studies of nitroimidazole conjugated heteroscorpionate ligands and related Cu(I) and Cu(II) complexes. J Inorg Biochem 2018; 187:33-40. [PMID: 30053534 DOI: 10.1016/j.jinorgbio.2018.07.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/04/2018] [Accepted: 07/18/2018] [Indexed: 12/18/2022]
Abstract
Copper(I) and copper(II) complexes of 5-nitroimidazole conjugated heteroscorpionate ligands have been synthesized. In particular, the new 2,2-bis(pyrazol-1-yl)-N-(2-(2-methyl-5-nitro-1H-imidazol-1-yl)ethyl)acetamide ligand (LHMN) was synthesized by direct coupling of preformed side chain acid with 5-nitroimidazole and its coordination chemistry was investigated towards Cu(I) and Cu(II) acceptors and compared with that of the related 2,2-bis(3,5-dimethyl-1-H-pyrazol-1-yl)-N-(2-(2-methyl-5-nitro-1H-imidazol-1-yl)ethyl)acetamide ligand (LMeMN). The copper(II) complexes {[(LMeMN)2Cu]Cl2} and {[(LHMN)2Cu]Cl2} were prepared by the reaction of CuCl2·2H2O with LHMN or LMeMN ligands in methanol solution. The water soluble copper(I) complexes {[(LMeMN)Cu(PTA)2]}(PF6) and {[(LHMN)Cu(PTA)2]}(PF6) were prepared by the reaction of Cu(CH3CN)4PF6 and 1,3,5-triaza-7-phosphaadamantane (PTA) with LHMN or LMeMN ligands in acetonitrile solution. The new Cu(I) and Cu(II) complexes as well as the corresponding uncoordinated ligands were evaluated for their cytotoxic activity against 2D monolayer cultures of multiple human cancer cell lines and 3D-cultured HCT-15 colon cancer spheroids. Morphological analysis by Transmission Electron Microscopy (TEM) revealed the induction of a massive cytoplasmic vacuolization consistent with a paraptotic-like cancer cell death.
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Affiliation(s)
- Maura Pellei
- School of Science and Technology, Chemistry Division, University of Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy.
| | - Valentina Gandin
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via Marzolo 5, 35131 Padova, Italy.
| | - Cristina Cimarelli
- School of Science and Technology, Chemistry Division, University of Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy
| | - Wilma Quaglia
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, Via S. Agostino 1, 62032 Camerino, Macerata, Italy
| | - Nello Mosca
- School of Science and Technology, Chemistry Division, University of Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy
| | - Luca Bagnarelli
- School of Science and Technology, Chemistry Division, University of Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy
| | - Cristina Marzano
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via Marzolo 5, 35131 Padova, Italy
| | - Carlo Santini
- School of Science and Technology, Chemistry Division, University of Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy
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11
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Morelli MB, Amantini C, Santoni G, Pellei M, Santini C, Cimarelli C, Marcantoni E, Petrini M, Del Bello F, Giorgioni G, Piergentili A, Quaglia W. Novel antitumor copper( ii) complexes designed to act through synergistic mechanisms of action, due to the presence of an NMDA receptor ligand and copper in the same chemical entity. NEW J CHEM 2018. [DOI: 10.1039/c8nj01763h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An NMDA receptor ligand was linked to bifunctionalizable species to form copper(ii) complexes, showing antitumor activity through synergistic action mechanisms.
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12
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Cimarelli C, Bordi S, Piermattei P, Pellei M, Del Bello F, Marcantoni E. An Efficient Lewis Acid Catalyzed Povarov Reaction for the One-Pot Stereocontrolled Synthesis of Polyfunctionalized Tetrahydroquinolines. SYNTHESIS-STUTTGART 2017. [DOI: 10.1055/s-0036-1589104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
An easy and efficient synthetic methodology for the one-pot stereocontrolled synthesis of tetrahydroquinolines through Lewis acid activated Povarov reaction is described. The protocol takes advantage of the very cheap, easy to handle, and environmentally friendly cerium trichloride as catalyst and allows to obtain either the anti- or the syn-isomer of the final tetrahydroquinoline with good selectivity, by performing the reaction in solvent or solventless conditions. The scope of the reaction is expanded to the one-pot synthesis of N-alkyltetrahydroquinolines through a very efficient iminium-Povarov approach. A deeper insight on the reaction system was provided by the study on the side reactions occurring in the reaction conditions and on the nature of the stereoselectivity.
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Affiliation(s)
- Cristina Cimarelli
- School of Science and Technology - Chemistry Division, University of Camerino
| | - Samuele Bordi
- School of Science and Technology - Chemistry Division, University of Camerino
| | - Pamela Piermattei
- School of Science and Technology - Chemistry Division, University of Camerino
| | - Maura Pellei
- School of Science and Technology - Chemistry Division, University of Camerino
| | - Fabio Del Bello
- School of Pharmacy - Medicinal Chemistry Unit, University of Camerino
| | - Enrico Marcantoni
- School of Science and Technology - Chemistry Division, University of Camerino
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13
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Witt V, Ayris PM, Damby DE, Cimarelli C, Kueppers U, Dingwell DB, Wörheide G. Volcanic ash supports a diverse bacterial community in a marine mesocosm. Geobiology 2017; 15:453-463. [PMID: 28256065 PMCID: PMC5413822 DOI: 10.1111/gbi.12231] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 01/25/2017] [Indexed: 06/06/2023]
Abstract
Shallow-water coral reef ecosystems, particularly those already impaired by anthropogenic pressures, may be highly sensitive to disturbances from natural catastrophic events, such as volcanic eruptions. Explosive volcanic eruptions expel large quantities of silicate ash particles into the atmosphere, which can disperse across millions of square kilometres and deposit into coral reef ecosystems. Following heavy ash deposition, mass mortality of reef biota is expected, but little is known about the recovery of post-burial reef ecosystems. Reef regeneration depends partly upon the capacity of the ash deposit to be colonised by waterborne bacterial communities and may be influenced to an unknown extent by the physiochemical properties of the ash substrate itself. To determine the potential for volcanic ash to support pioneer bacterial colonisation, we exposed five well-characterised volcanic and coral reef substrates to a marine aquarium under low light conditions for 3 months: volcanic ash, synthetic volcanic glass, carbonate reef sand, calcite sand and quartz sand. Multivariate statistical analysis of Automated Ribosomal Intergenic Spacer Analysis (ARISA) fingerprinting data demonstrates clear segregation of volcanic substrates from the quartz and coral reef substrates over 3 months of bacterial colonisation. Overall bacterial diversity showed shared and substrate-specific bacterial communities; however, the volcanic ash substrate supported the most diverse bacterial community. These data suggest a significant influence of substrate properties (composition, granulometry and colour) on bacterial settlement. Our findings provide first insights into physicochemical controls on pioneer bacterial colonisation of volcanic ash and highlight the potential for volcanic ash deposits to support bacterial diversity in the aftermath of reef burial, on timescales that could permit cascading effects on larval settlement.
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Affiliation(s)
- V. Witt
- Department of Earth and Environmental SciencesLudwig‐Maximilians‐UniversitätMunichGermany
- MWM‐Museum Witt MünchenMunichGermany
| | - P. M. Ayris
- Department of Earth and Environmental SciencesLudwig‐Maximilians‐UniversitätMunichGermany
| | - D. E. Damby
- Department of Earth and Environmental SciencesLudwig‐Maximilians‐UniversitätMunichGermany
- United States Geological SurveyMenlo ParkCAUSA
| | - C. Cimarelli
- Department of Earth and Environmental SciencesLudwig‐Maximilians‐UniversitätMunichGermany
| | - U. Kueppers
- Department of Earth and Environmental SciencesLudwig‐Maximilians‐UniversitätMunichGermany
| | - D. B. Dingwell
- Department of Earth and Environmental SciencesLudwig‐Maximilians‐UniversitätMunichGermany
| | - G. Wörheide
- Department of Earth and Environmental SciencesLudwig‐Maximilians‐UniversitätMunichGermany
- GeoBio‐CenterMunichGermany
- SNSB‐Bavarian State Collections of Palaeontology und GeologyMunichGermany
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14
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Marinelli M, Pellei M, Cimarelli C, Dias HR, Marzano C, Tisato F, Porchia M, Gandin V, Santini C. Novel multicharged silver(I)–NHC complexes derived from zwitterionic 1,3-symmetrically and 1,3-unsymmetrically substituted imidazoles and benzimidazoles: Synthesis and cytotoxic properties. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.01.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Bonifazi A, Del Bello F, Mammoli V, Piergentili A, Petrelli R, Cimarelli C, Pellei M, Schepmann D, Wünsch B, Barocelli E, Bertoni S, Flammini L, Amantini C, Nabissi M, Santoni G, Vistoli G, Quaglia W. Novel Potent N-Methyl-d-aspartate (NMDA) Receptor Antagonists or σ1 Receptor Ligands Based on Properly Substituted 1,4-Dioxane Ring. J Med Chem 2015; 58:8601-15. [PMID: 26430967 DOI: 10.1021/acs.jmedchem.5b01214] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two series of 1,4-dioxanes (4-11 and 12-19) were rationally designed and prepared to interact either with the phencyclidine (PCP) binding site of the N-methyl-d-aspartate (NMDA) receptor or with σ1 receptors, respectively. The biological profiles of the novel compounds were assessed using radioligand binding assays, and the compounds with the highest affinities were investigated for their functional activity. The results were in line with the available pharmacophore models and highlighted that the 1,4-dioxane scaffold is compatible with potent antagonist activity at NMDA receptor or high affinity for σ1 receptors. The primary amines 6b and 7 bearing a cyclohexyl and a phenyl ring or two phenyl rings in position 6, respectively, were the most potent noncompetitive antagonists at the NMDA receptor with IC50 values similar to those of the dissociative anesthetic (S)-(+)-ketamine. The 5,5-diphenyl substitution associated with a benzylaminomethyl moiety in position 2, as in 18, favored the interaction with σ1 receptors.
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Affiliation(s)
- Alessandro Bonifazi
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Università di Camerino , Via S. Agostino 1, 62032 Camerino, Italy
- Institut für Pharmazeutische und Medizinische Chemie, Universität Münster , Corrensstraße 48, 48149 Münster, Germany
| | - Fabio Del Bello
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Università di Camerino , Via S. Agostino 1, 62032 Camerino, Italy
| | - Valerio Mammoli
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Università di Camerino , Via S. Agostino 1, 62032 Camerino, Italy
| | - Alessandro Piergentili
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Università di Camerino , Via S. Agostino 1, 62032 Camerino, Italy
| | - Riccardo Petrelli
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Università di Camerino , Via S. Agostino 1, 62032 Camerino, Italy
| | - Cristina Cimarelli
- Scuola di Scienze e Tecnologie, Università di Camerino , Via S. Agostino 1, 62032 Camerino, Italy
| | - Maura Pellei
- Scuola di Scienze e Tecnologie, Università di Camerino , Via S. Agostino 1, 62032 Camerino, Italy
| | - Dirk Schepmann
- Institut für Pharmazeutische und Medizinische Chemie, Universität Münster , Corrensstraße 48, 48149 Münster, Germany
| | - Bernhard Wünsch
- Institut für Pharmazeutische und Medizinische Chemie, Universität Münster , Corrensstraße 48, 48149 Münster, Germany
| | - Elisabetta Barocelli
- Dipartimento di Farmacia, Università degli Studi di Parma , V.le delle Scienze 27/A, 43124 Parma, Italy
| | - Simona Bertoni
- Dipartimento di Farmacia, Università degli Studi di Parma , V.le delle Scienze 27/A, 43124 Parma, Italy
| | - Lisa Flammini
- Dipartimento di Farmacia, Università degli Studi di Parma , V.le delle Scienze 27/A, 43124 Parma, Italy
| | - Consuelo Amantini
- Scuola di Bioscienze e Medicina Veterinaria, Università di Camerino , via Madonna delle Carceri 9, 62032 Camerino, Italy
| | - Massimo Nabissi
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Università di Camerino , Via Madonna delle Carceri 9, 62032 Camerino, Italy
| | - Giorgio Santoni
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Università di Camerino , Via Madonna delle Carceri 9, 62032 Camerino, Italy
| | - Giulio Vistoli
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano , Via Mangiagalli 25, 20133 Milano, Italy
| | - Wilma Quaglia
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Università di Camerino , Via S. Agostino 1, 62032 Camerino, Italy
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Cimarelli C, Di Nicola M, Diomedi S, Giovannini R, Hamprecht D, Properzi R, Sorana F, Marcantoni E. An efficient one-pot two catalyst system in the construction of 2-substituted benzimidazoles: synthesis of benzimidazo[1,2-c]quinazolines. Org Biomol Chem 2015; 13:11687-95. [PMID: 26477673 DOI: 10.1039/c5ob01777g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The benzimidazole core is a common moiety in a large number of natural products and pharmacologically active small molecules. The synthesis of novel benzimidazole derivatives remains a main focus in medicinal research. In continuation of the efforts towards Ce(III) catalysts for organic transformations, we observed for the first time the activity of the iodide ion and copper cation in activating CeCl3·7H2O in the selective formation of prototypical 2-substituted benzimidazoles. The one-pot CeCl3·7H2O-CuI catalytic system procedure includes the cyclo-dehydrogenation of aniline Schiff's bases, generated in situ from the condensation of 1,2-phenylenediamine and aldehydes, followed by the oxidation with iodine, which works as a hydrogen sponge. Mild reaction conditions, good to excellent yields, and clean reactions make the procedure a useful contribution to the synthesis of biologically active fused heterocycles containing benzimidazoquinazolines.
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Affiliation(s)
- Cristina Cimarelli
- School of Science and Technology, Chemistry Division, University of Camerino, via S. Agostino 1, I-62032 Camerino (MC), Italy.
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Bartoli G, Cimarelli C, Cipolletti R, Diomedi S, Giovannini R, Mari M, Marsili L, Marcantoni E. Microwave-Assisted Cerium(III)-Promoted Cyclization of Propargyl Amides to Polysubstituted Oxazole Derivatives. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101302] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Cimarelli C, Fratoni D, Mazzanti A, Palmieri G. Betti Reaction of Cyclic Imines with Naphthols and Phenols - Preparation of New Derivatives of Betti's Bases. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001611] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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Cimarelli C, Fratoni D, Palmieri G. Borane-mediated asymmetric reduction of acetophenone by enantiopure aminonaphthols and aminoalcohols as catalytic source. Chirality 2009; 22:655-61. [PMID: 20014037 DOI: 10.1002/chir.20812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Practical, cheap, and stereoselective synthetic methods were applied to the preparation of novel 1-(aminoalkyl)naphthol and gamma-aminoalcohol tridentate ligands. The ligands obtained were conveniently applied with good results as catalytic sources in the borane-mediated enantioselective reduction of acetophenone with borane dimethylsulfide. Conformational analysis through molecular modeling allows the rationalization of observed stereochemical outcomes.
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Affiliation(s)
- Cristina Cimarelli
- Department of Chemical Sciences, University of Camerino, Camerino, Italy.
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20
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Cimarelli C, Fratoni D, Palmieri G. A convenient synthesis of new diamine, amino alcohol and aminophosphines chiral auxiliaries based on limonene oxide. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.08.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Cimarelli C, Fratoni D, Palmieri G. Application of Enantiopure 1-(Aminoalkyl)naphthols and 2-(Aminoalkyl)phenols in the Enantioselective Addition of Organozinc to α,β-Unsaturated Carbonyl Compounds. SYNTHETIC COMMUN 2009. [DOI: 10.1080/00397910902737148] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Cristina Cimarelli
- a University of Camerino, Department of Chemical Sciences , Camerino, Italy
| | - Davide Fratoni
- a University of Camerino, Department of Chemical Sciences , Camerino, Italy
| | - Gianni Palmieri
- a University of Camerino, Department of Chemical Sciences , Camerino, Italy
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Affiliation(s)
- Cristina Cimarelli
- a Universita degli Studi di Comerino, Dipartimento di Scienze chimiche , Via S Agostino 1, I-62032 , Camerino , ITALY
| | - Gianni Palmieri
- a Universita degli Studi di Comerino, Dipartimento di Scienze chimiche , Via S Agostino 1, I-62032 , Camerino , ITALY
| | - Emanuela Volpini
- a Universita degli Studi di Comerino, Dipartimento di Scienze chimiche , Via S Agostino 1, I-62032 , Camerino , ITALY
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Cimarelli C, Palmieri G. Synthesis of enantiopure 2-(aminoalkyl)phenol derivatives and their application as catalysts in stereoselective reactions. Chirality 2009; 21:218-32. [DOI: 10.1002/chir.20656] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Cimarelli C, Giuli S, Palmieri G. One-Pot Addition/Reduction Procedure for the Synthesis of -Amino Alcohols from -Enamino Ketones. European J Org Chem 2006. [DOI: 10.1002/ejoc.200500702] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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26
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Cimarelli C, Palmieri G, Volpini E. A facile synthesis of 3,4-dialkyl-3,4-dihydro-2H-1,3-benzoxazin-2-ones and naphthoxazin-2-ones and their reactions with organolithium and Grignard reagents Preparation of N-[1-(2′-hydroxyphenyl)alkyl]amides. CAN J CHEM 2004. [DOI: 10.1139/v04-100] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A facile and simple method for the preparation of 3,4-dialkyl-3,4-dihydro-2H-1,3-benzoxazin-2-ones or naphthoxazin-2-ones in high yields from aminoalkylphenols and aminoalkylnaphthols is described. The reactions of the products obtained with organolithium and Grignard reagents were studied, and a method for the preparation of N-[1-(2-hydroxyphenyl)alkyl]-N-alkylamides, which are of pharmaceutical interest, from benzoxazinones was developed. A possible reaction mechanism is also proposed. The relative configuration of chiral products was determined from conformational analysis of 1H NMR spectra.Key words: benzoxazinones, naphthoxazinones, organometallic reagents, amide preparation, aminoalkylphenols.
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Cimarelli C, Palmieri G, Volpini E. Stereoselective alkylation of chiral 2-imidoylphenols with organolithium reagents: synthesis of enantiopure 2-aminoalkylphenols. J Org Chem 2003; 68:1200-6. [PMID: 12585856 DOI: 10.1021/jo020423e] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this paper the addition of organolithium reagents to chiral imidoylphenols to prepare enantiopure phenolic Mannich-type bases is described. The experimental data show that this kind of imine is surprisingly reactive toward organolithium reagents, differently from classical imines, and does not need any Lewis acid or base activation. Moreover, interesting results have been obtained with aldimines but more unusually with ketimines. This reaction results in high yields and diastereoselectivities and allows the preparation of aminophenols quaternary at the C-1 carbon atom, which cannot be prepared with the methods available till now. The sense of asymmetric induction has been explained and confirmed in agreement with the results previously obtained by hydride reduction of the same substrates. In some cases this procedure is complementary to the reductive one, allowing the preparation of the diastereomers less abundant in the reduction. The reaction allows the synthesis of one or the other of the two diastereomers, choosing the opportune starting imidoylphenol and the organolithium reagent.
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Affiliation(s)
- Cristina Cimarelli
- Dipartimento di Scienze Chimiche via s. Agostino 1-62032 Camerino, Italy
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Cimarelli C, Palmieri G, Volpini E. A practical stereoselective synthesis of secondary and tertiary aminonaphthols: chiral ligands for enantioselective catalysts in the addition of diethylzinc to benzaldehyde. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0957-4166(02)00651-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Cimarelli C, Palmieri G, Volpini E. Synthesis of enantiopure 2-aminoalkylphenols by stereoselective addition of Grignard reagents to chiral 2-imidoylphenols. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0957-4166(02)00544-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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Bartoli G, Cimarelli C, Marcantoni E, Palmieri G, Petrini M. Chemo- and Diastereoselective Reduction of .beta.-Enamino Esters: A Convenient Synthesis of Both cis- and trans-.gamma.-Amino Alcohols and .beta.-Amino Esters. J Org Chem 2002. [DOI: 10.1021/jo00097a039] [Citation(s) in RCA: 183] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bartoli G, Bosco M, Cimarelli C, Dalpozzo R, De Munno G, Guercio G, Palmieri G. Reaction of dianions of acyclic .beta.-enamino ketones with electrophiles. 3. Nitriles: synthesis of pyridine and pyrimidine derivatives. J Org Chem 2002. [DOI: 10.1021/jo00048a043] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Cimarelli C, Mazzanti A, Palmieri G, Volpini E. Solvent-free asymmetric aminoalkylation of electron-rich aromatic compounds: stereoselective synthesis of aminoalkylnaphthols by crystallization-induced asymmetric transformation. J Org Chem 2001; 66:4759-65. [PMID: 11442400 DOI: 10.1021/jo0101205] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electron-rich aromatic compounds such as 2-naphthol give a faster and asymmetric 1-aminoalkylation with high yields when treated with (R)-1-phenylethylamine and aromatic aldehydes in solvent-free conditions. An asymmetric transformation of a second kind, probably induced by the preferential crystallization of one diastereomer, affords the straightforward and stereoselective synthesis of aminoalkylnaphthols. Mechanisms predictable for this asymmetric reaction are reported. The absolute configurations and the conformations of the unknown aminonaphthols are widely ascertained.
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Affiliation(s)
- C Cimarelli
- Dipartimento di Scienze Chimiche, Universita di Camerino, via s. Agostino 1, 62032 Camerino, Italy
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Cimarelli C, Palmieri G. Asymmetric reduction of enantiopure imines with zinc borohydride: stereoselective synthesis of chiral amines. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0957-4166(00)00209-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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D’Acquarica I, Gasparrini F, Misiti D, Zappia G, Cimarelli C, Palmieri G, Carotti A, Cellamare S, Villani C. Application of a new chiral stationary phase containing the glycopeptide antibiotic A-40,926 in the direct chromatographic resolution of β-amino acids. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0957-4166(00)00198-1] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Cimarelli C, Palmieri G. Stereoselective synthesis of 5-alkyliden-6-aminotetrahydro-2-pyranones through an unexpected isomerization of the hydroxytetrahydro-2-pyridinones obtained by the selective reduction of acylated enaminones. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(97)10333-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Abstract
The direct separation of beta-aminoester enantiomers by HPLC on synthetic chiral stationary phases based on a pi-acidic derivative of trans 1,2-diaminocyclohexane as selector is described. The application of different columns containing the stationary phase with opposite configurations and in the racemic form to the determination of enantiomeric excess in chemically impure samples is demonstrated.
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Affiliation(s)
- F Gasparrini
- Dipartimento di Studi di Chimica e Technologia delle Sostanze Biologicamente Attive, Università La Sapienza, Roma, Italy
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Cimarelli C, Palmieri G. Stereoselective Reduction of Enantiopure β-Enamino Esters by Hydride: A Convenient Synthesis of Both Enantiopure β-Amino Esters. J Org Chem 1996. [DOI: 10.1021/jo960107y] [Citation(s) in RCA: 120] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cristina Cimarelli
- Dipartimento di Scienze Chimiche, via S. Agostino 1, I-62032 Camerino, Italy
| | - Gianni Palmieri
- Dipartimento di Scienze Chimiche, via S. Agostino 1, I-62032 Camerino, Italy
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Cimarelli C, Palmieri G, Camalli M. A directed stereoselective aldol reaction: Simple synthesis of enantiopure δ-hydroxy-β-enamino ketones by condensation of homochiral β-enamino ketones with aldehydes and ketones. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/0957-4166(96)00253-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bartoli G, Cimarelli C, Dalpozzo R, Palmieri G. A versatile route to β-enamino esters by acylation of lithium enamines with diethyl carbonate or benzyl chloroformate. Tetrahedron 1995. [DOI: 10.1016/0040-4020(95)00476-o] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Cimarelli C, Palmieri G, Bartoli G. Diastereo and enantioselective entry to β-amino esters by hydride reduction of homochiral β-enamino esters. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0957-4166(94)80111-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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44
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Bartoli G, Cimarelli C, Palmieri G. Convenient procedure for the reduction of β-enamino ketones: synthesis of γ-amino alcohols and tetrahydro-1,3-oxazines. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/p19940000537] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Bartoli G, Cimarelli C, Marcantoni E, Palmieri G, Petrini M. Highly stereoselective synthesis of αβ-unsaturated ketones by CeCl3mediated addition of grignard reagents to β-enamino ketones. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/c39940000715] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Bartoli G, Bosco M, Cimarelli C, Dalpozzo R, De Munno G, Palmieri G. Stereoselective alkylation of cyclic and acyclic chiral β-enamino ketones lithium dianions: synthesis of either (R)- or (S)-chiral 1,3-diketones. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/s0957-4166(00)80373-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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47
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Bartoli G, Bosco M, Cimarelli C, Dalpozzo R, Guercio G, Palmieri G. Reactions of dianions of acyclic β-enamino ketones with electrophiles. Part 5. Esters: synthesis of pyridin-4-one and pyran-4-one derivatives. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/p19930002081] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bartoli G, Cimarelli C, Palmieri G, Rafaiani G. Stereoselective carbon—carbon bond formation: γ-alkylation of lithium dianion of chiral cyclic β-enamino ketones. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/s0957-4166(00)80510-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Bartoli G, Bosco M, Cimarelli C, Dalpozzo R, Guerra M, Palmieri G. Selectivity in C-alkylation of dianions of acyclic β-enamino ketones. ACTA ACUST UNITED AC 1992. [DOI: 10.1039/p29920000649] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Bartoli G, Bosco M, Cimarelli C, Dalpozzo R, Palmier G. Reaction of dianions of acyclic β-enamino ketones with electrophiles. Part 2. Oxiranes: synthesis of γ′- and ε-hydroxy-β-enamino ketones and of α-tetrahydrofurylidene ketones. ACTA ACUST UNITED AC 1992. [DOI: 10.1039/p19920002095] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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