1
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Biswas S, Tabasi ZA, Dawe LN, Zhao Y, Bodwell GJ. Synthesis of anti-[1](1,6)Naphthaleno[1](1,6)naphthalenophane by Double Contractive Annulation of [2.2]Paracyclophane. Org Lett 2022; 24:5009-5013. [DOI: 10.1021/acs.orglett.2c01602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sourav Biswas
- Department of Chemistry, Memorial University of Newfoundland, 45 Arctic Avenue, St. John’s, NL Canada, A1C 5S7
| | - Zahra A. Tabasi
- Department of Chemistry, Memorial University of Newfoundland, 45 Arctic Avenue, St. John’s, NL Canada, A1C 5S7
| | - Louise N. Dawe
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON Canada, N2L 3C5
| | - Yuming Zhao
- Department of Chemistry, Memorial University of Newfoundland, 45 Arctic Avenue, St. John’s, NL Canada, A1C 5S7
| | - Graham J. Bodwell
- Department of Chemistry, Memorial University of Newfoundland, 45 Arctic Avenue, St. John’s, NL Canada, A1C 5S7
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2
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Tewari S, Mungalpara MN, Patel S, Rowlands GJ. The concise synthesis and resolution of planar chiral [2.2]paracyclophane oxazolines by C-H activation. RSC Adv 2022; 12:8588-8591. [PMID: 35424822 PMCID: PMC8984818 DOI: 10.1039/d2ra01075e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 03/03/2022] [Indexed: 11/29/2022] Open
Abstract
Planar chiral [2.2]paracyclophanes are resolved through the direct C–H arylation of enantiopure oxazolines, providing a convenient route to ligands and chiral materials. Preliminary results show that hydrolysis followed by decarboxylative phosphorylation leads to enantiopure [2.2]paracyclophane derivatives that are otherwise challenging to prepare. Racemic bromo[2.2]paracyclophanes are directly transformed into enantiomerically pure planar chiral oxazolines in one step with simultaneous resolution of planar chirality.![]()
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Affiliation(s)
- Shashank Tewari
- School of Natural Sciences, Massey University Private Bag 11 222 Palmerston North 4442 New Zealand
| | - Maulik N Mungalpara
- School of Natural Sciences, Massey University Private Bag 11 222 Palmerston North 4442 New Zealand
| | - Suraj Patel
- School of Natural Sciences, Massey University Private Bag 11 222 Palmerston North 4442 New Zealand
| | - Gareth J Rowlands
- School of Natural Sciences, Massey University Private Bag 11 222 Palmerston North 4442 New Zealand
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3
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Zippel C, Israil R, Schüssler L, Hassan Z, Schneider EK, Weis P, Nieger M, Bizzarri C, Kappes MM, Riehn C, Diller R, Bräse S. Metal-to-Metal Distance Modulated Au(I)/Ru(II) Cyclophanyl Complexes: Cooperative Effects in Photoredox Catalysis. Chemistry 2021; 27:15187-15200. [PMID: 34655123 PMCID: PMC8596992 DOI: 10.1002/chem.202102341] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Indexed: 12/13/2022]
Abstract
The modular synthesis of Au(I)/Ru(II) decorated mono- and heterobimetallic complexes with π-conjugated [2.2]paracyclophane is described. [2.2]Paracyclophane serves as a rigid spacer which holds the metal centers in precise spatial orientations and allows metal-to-metal distance modulation. A broad set of architectural arrangements of pseudo -geminal, -ortho, -meta, and -para substitution patterns were employed. Metal-to-metal distance modulation of Au(I)/Ru(II) heterobimetallic complexes and the innate transannular π-communication of the cyclophanyl scaffold provides a promising platform for the investigations of structure-activity relationship and cooperative effects. The Au(I)/Ru(II) heterobimetallic cyclophanyl complexes are stable, easily accessible, and exhibit promising catalytic activity in the visible-light promoted arylative Meyer-Schuster rearrangement.
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Affiliation(s)
- Christoph Zippel
- Institute of Organic Chemistry (IOC)Karlsruhe Institute of Technology (KIT)Fritz-Haber-Weg 676131KarlsruheGermany
| | - Roumany Israil
- Department of Chemistry, Technische Universität Kaiserslautern (TUK)Erwin-Schrödinger-Str. 5267663KaiserslauternGermany
| | - Lars Schüssler
- Department of Physics, Technische Universität Kaiserslautern (TUK)Erwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Zahid Hassan
- Institute of Organic Chemistry (IOC)Karlsruhe Institute of Technology (KIT)Fritz-Haber-Weg 676131KarlsruheGermany
| | - Erik K. Schneider
- Institute of Physical ChemistryKarlsruhe Institute of Technology (KIT)Fritz-Haber Weg 276131KarlsruheGermany
| | - Patrick Weis
- Institute of Physical ChemistryKarlsruhe Institute of Technology (KIT)Fritz-Haber Weg 276131KarlsruheGermany
| | - Martin Nieger
- Department of ChemistryUniversity of HelsinkiP. O. Box 55Helsinki00014Finland
| | - Claudia Bizzarri
- Institute of Organic Chemistry (IOC)Karlsruhe Institute of Technology (KIT)Fritz-Haber-Weg 676131KarlsruheGermany
| | - Manfred M. Kappes
- Institute of Physical ChemistryKarlsruhe Institute of Technology (KIT)Fritz-Haber Weg 276131KarlsruheGermany
- Institute of NanotechnologyKarlsruhe Institute of TechnologyHerman-von Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Christoph Riehn
- Department of Chemistry, Technische Universität Kaiserslautern (TUK)Erwin-Schrödinger-Str. 5267663KaiserslauternGermany
- Research Center OPTIMASErwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Rolf Diller
- Department of Physics, Technische Universität Kaiserslautern (TUK)Erwin-Schrödinger-Str. 4667663KaiserslauternGermany
| | - Stefan Bräse
- Institute of Organic Chemistry (IOC)Karlsruhe Institute of Technology (KIT)Fritz-Haber-Weg 676131KarlsruheGermany
- Institute of Biological and Chemical SystemsFunctional Molecular Systems (IBCS-FMS) Karlsruhe Institute of Technology (KIT)Hermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
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4
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Hassan Z, Bräse S. Metal-to-Metal Distance Modulation by Ligand Design: A Case Study of Structure-Property Correlation in Planar Chiral Cyclophanyl Metal Complexes. Chemistry 2021; 27:15020-15026. [PMID: 34449116 PMCID: PMC8597128 DOI: 10.1002/chem.202102336] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Indexed: 11/25/2022]
Abstract
Multinuclear metal complexes have seen tremendous progress in synthetic advances, their versatile structural features, and emerging applications. Here, we conceptualize Metal-to-Metal distance modulation in cyclophanyl metal complexes by bridging ligand design employing the co-facially stacked cyclophanyl-derived pseudo-geminal, -ortho, -meta, and -para constitutional isomers grafted with N-, O-, and P- containing chelates that allow the installation of diverse (hetero)metallic moieties in a distance-defined and spatially-oriented relation to one another. Metal-to-Metal distance modulation and innate transannular "through-space" π-π electronic interactions via the co-facially stacked benzene rings in cyclophanyl-derived complexes as well as their specific stereochemical structural features (element of planar chirality) are crucial factors that contribute to the tuning of structure-property relationships, which stand at the very center from the perspective of cooperative effects in catalysis as well as emerging material applications.
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Affiliation(s)
- Zahid Hassan
- Institute of Organic Chemistry (IOC)Karlsruhe Institute of Technology (KIT)Fritz-Haber-Weg 676131KarlsruheGermany
| | - Stefan Bräse
- Institute of Organic Chemistry (IOC)Karlsruhe Institute of Technology (KIT)Fritz-Haber-Weg 676131KarlsruheGermany
- Institute of Biological and Chemical SystemsFunctional Molecular Systems (IBCS-FMS)Karlsruhe Institute of Technology (KIT)Hermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
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5
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Zippel C, Bartholomeyzik T, Friedmann C, Nieger M, Hassan Z, Bräse S. Regioselective
ortho
‐Palladation of [2.2]Paracyclophane Scaffolds: Accessing Planar and Central Chiral N,C‐Palladacycles. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101066] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Christoph Zippel
- Institute of Organic Chemistry (IOC) Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Teresa Bartholomeyzik
- Institute of Organic Chemistry (IOC) Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Christian Friedmann
- Institute of Organic Chemistry (IOC) Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Martin Nieger
- Department of Chemistry University of Helsinki P. O. Box 55 00014 Helsinki Finland
| | - Zahid Hassan
- Institute of Organic Chemistry (IOC) Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Stefan Bräse
- Institute of Organic Chemistry (IOC) Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
- Institute of Biological and Chemical Systems – Functional Molecular Systems (IBCS-FMS) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
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6
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Felder S, Micouin L, Benedetti E. Para‐Functionalization of N‐Substituted 4‐amino[2.2]paracyclophanes by Regioselective Formylation. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100288] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Simon Felder
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques – UMR8601 CNRS Université de Paris 45 rue des Saints Pères 75006 Paris France
| | - Laurent Micouin
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques – UMR8601 CNRS Université de Paris 45 rue des Saints Pères 75006 Paris France
| | - Erica Benedetti
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques – UMR8601 CNRS Université de Paris 45 rue des Saints Pères 75006 Paris France
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7
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Mungalpara MN, Plieger PG, Rowlands GJ. The Synthesis of Pyridyl[2.2]paracyclophanes by Palladium‐Catalyzed Cross‐Coupling of Pyridine Sulfinates. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Paul G. Plieger
- School of Fundamental Sciences Massey University Palmerston North New Zealand
| | - Gareth J. Rowlands
- School of Fundamental Sciences Massey University Palmerston North New Zealand
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8
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Zippel C, Hassan Z, Parsa AQ, Hohmann J, Bräse S. Multigram‐Scale Kinetic Resolution of 4‐Acetyl[2.2]Paracyclophane
via
Ru‐Catalyzed Enantioselective Hydrogenation: Accessing [2.2]Paracyclophanes with Planar and Central Chirality. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001536] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Christoph Zippel
- Institute of Organic Chemistry Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Zahid Hassan
- Institute of Organic Chemistry Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Ahmad Qais Parsa
- Institute of Organic Chemistry Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Jens Hohmann
- Institute of Organic Chemistry Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Stefan Bräse
- Institute of Organic Chemistry Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
- Institute of Biological and Chemical Systems – FMS Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
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9
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New Paracyclophanylthiazoles with Anti-Leukemia Activity: Design, Synthesis, Molecular Docking, and Mechanistic Studies. Molecules 2020; 25:molecules25133089. [PMID: 32645912 PMCID: PMC7411887 DOI: 10.3390/molecules25133089] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 05/12/2020] [Accepted: 05/13/2020] [Indexed: 11/23/2022] Open
Abstract
A new series of methyl 2-(2-(4′-[2.2]paracyclophanyl)-hydrazinylidene)-3-substituted-4-oxothiazolidin-5-ylidene)acetates 3a–f were synthesized from the reaction of paracyclophanyl-acylthiosemicarbazides 2a–f with dimethyl acetylenedicarboxylate. Based upon nuclear magnetic resonance (NMR), infrared (IR), and mass spectra (HRMS), the structure of the obtained products was elucidated. X-ray structure analysis was also used as unambiguous tool to elucidate the structure of the products. The target compounds 3a–f were screened against 60 cancer cell lines. They displayed anticancer activity against a leukemia subpanel, namely, RPMI-8226 and SR cell lines. The activity of compound 3a was found as the most cytotoxic potency against 60 cancer cell lines. Consequently, it was selected for further five doses analysis according to National Cancer Institute (NCI) protocol. The cytotoxic effect showed selectivity ratios ranging between 0.63 and 1.28 and between 0.58 and 5.89 at the GI50 and total growth inhibition (TGI) levels, respectively. Accordingly, compound 3a underwent further mechanistic study against the most sensitive leukemia RPMI-8226 and SR cell lines. It showed antiproliferation with IC50 = 1.61 ± 0.04 and 1.11 ± 0.03 µM against RPMI-8226 and SR cell lines, respectively. It also revealed a remarkable tubulin inhibitory activity, compared to colchicine with IC50 = 4.97 µM/mL. Caspase-3, BAX, and Bcl-2 assays for 3a using annexin V-FITC staining revealed significant pro-apoptotic activity. Furthermore, multidrug-resistant leukemia SR cells were used to show better resistance indices (1.285 ng/mL, 1.15-fold) than the reference. Docking studies with β-tubulin indicate that most of the tested compounds illustrated good binding at the colchicine binding site of the enzyme, especially for compound 3a, which made several interactions better than that of the reference colchicine.
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10
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Kitagaki S, Murata S, Asaoka K, Sugisaka K, Mukai C, Takenaga N, Yoshida K. Planar Chiral [2.2]Paracyclophane-Based Bisoxazoline Ligands: Design, Synthesis, and Use in Cu-Catalyzed Inter- and Intramolecular Asymmetric O–H Insertion Reactions. Chem Pharm Bull (Tokyo) 2018; 66:1006-1014. [PMID: 30270235 DOI: 10.1248/cpb.c18-00519] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | | | | | - Kenta Sugisaka
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University
| | - Chisato Mukai
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University
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11
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Knoll D, Bräse S. Suzuki Cross-Coupling of [2.2]Paracyclophane Trifluoroborates with Pyridyl and Pyrimidyl Building Blocks. ACS OMEGA 2018; 3:12158-12162. [PMID: 31459290 PMCID: PMC6645350 DOI: 10.1021/acsomega.8b01774] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 09/13/2018] [Indexed: 06/10/2023]
Abstract
We report a new Suzuki cross-coupling protocol for high yielding derivatization of [2.2]paracyclophane with pyridyl and pyrimidyl substituents. The [2.2]paracyclophane trifluoroborate salt presented herein is a bench stable, easily accessible, and convenient substitute to former cross-coupling substrates. This will be of very high interest for future paracyclophane derivatization endeavors.
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Affiliation(s)
- Daniel
M. Knoll
- Institute
of Organic Chemistry (IOC), Karlsruhe Institute
of Technology (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Stefan Bräse
- Institute
of Organic Chemistry (IOC), Karlsruhe Institute
of Technology (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
- Institute
of Toxicology and Genetics (ITG), Karlsruhe
Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
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12
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Hassan Z, Spuling E, Knoll DM, Lahann J, Bräse S. Planar chiral [2.2]paracyclophanes: from synthetic curiosity to applications in asymmetric synthesis and materials. Chem Soc Rev 2018; 47:6947-6963. [PMID: 30065985 DOI: 10.1039/c7cs00803a] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Planar chiral [2.2]paracyclophane-based ligands and employment of such enantiopure representative ligands to facilitate selective transformation of prochiral or racemic substances into enantiopure products are rarely explored compared to the complex chiral scaffolds such as ferrocenes. This tutorial discusses recent findings and inspiring progress in design, synthetic tunability and applications of planar chiral [2.2]paracyclophane systems as a practical class of catalysts for asymmetric synthesis. Here, we summarize a series of planar chiral [2.2]paracyclophanes that are becoming an important new tool-box in asymmetric synthesis, employed in a variety of synthetic venues such as new chiral ligands and catalysts for stereo-controlled and enantioselective addition of alkyl, alkenyl, alkynyl and aryl zinc reagents to aliphatic and aromatic aldehydes, ketones, imines and many more. Besides, planar chiral [2.2]paracyclophanes are useful synthons, from a material perspective, can be incorporated into conjugated polymeric systems for chiroptical and optoelectronic properties, find broad applications in bio- and materials science, for instance, gold-based cytostatics, surface-mounted chiral MOF thin films for selective adsorption or in functionalized parylene polymer coatings, to name a few. This is an up-to-date tutorial review, written exclusively on planar chiral [2.2]paracyclophane chemistry, covering key aspects of synthesis, structures, properties, applications and future directions of chiral polymeric assemblies and novel biomaterials built with [2.2]paracyclophanes.
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Affiliation(s)
- Zahid Hassan
- Institute for Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany.
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13
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Synthesis and spectral studies of sterically hindered half-sandwich d 6 metal complexes containing quinoxaline based electron rich heterocyclic pyrazoles. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.01.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Kitagaki S, Nakamura K, Kawabata C, Ishikawa A, Takenaga N, Yoshida K. Planar chiral [2.2]paracyclophane-based phosphine–phenols: use in enantioselective [3 + 2] annulations of allenoates and N-tosylimines. Org Biomol Chem 2018; 16:1770-1778. [DOI: 10.1039/c8ob00248g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Planar chiral [2.2]paracyclophane-based phosphine–phenols efficiently catalyze the [3 + 2] annulation of N-tosylimines and allenoate.
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