1
|
Yan X, Chen W, Xie W, Wang X, So YM, Shi X. Binuclear Enamino-Oxazolinate Rare-Earth Metal Complexes: Synthesis and Their Catalytic Performance in Isoprene Polymerization. Inorg Chem 2024; 63:13358-13366. [PMID: 38946308 DOI: 10.1021/acs.inorgchem.4c01219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
We have synthesized a series of binuclear rare-earth metal complexes bearing the newly designed enamino-oxazolinate ligands that feature bridging para-phenyl, meta-phenyl, 1,5-naphthalenyl, and 1,5-anthracenyl moieties. NMR and X-ray diffraction analyses confirmed the binuclear structures of the obtained complexes with two enamino-oxazolinate-metal units located at a trans position against the bridged aryl plane. After activation by [Ph3C][B(C6F5)4], all the rare-earth metal complexes served as efficient catalysts for isoprene polymerization, producing polymers with high cis-1,4 regularity (up to 96.1%) and high molecular weight. The steric and electronic effects exerted on the active metal centers, as well as the radius of metal centers, were the major contributing factors for determining both the catalytic activity and cis-1,4-selectivity of the binuclear catalytic systems. Compared to its mononuclear analogue, the binuclear yttrium catalytic system with a para-phenyl bridge exhibited a higher thermostability and catalytic efficiency during polymerization, revealing a special binuclear effect in this binuclear catalytic system.
Collapse
Affiliation(s)
- Xuyang Yan
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Wentao Chen
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Wang Xie
- Research Center for Composite Materials, Shanghai University, Shanghai 200444, China
| | - Xiuling Wang
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| | - Yat-Ming So
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 0000, China
| | - Xiaochao Shi
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
| |
Collapse
|
2
|
Gaumont AC, Gulea M, Levillain J. Overview of the Chemistry of 2-Thiazolines. Chem Rev 2009; 109:1371-401. [DOI: 10.1021/cr800189z] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Annie-Claude Gaumont
- Laboratoire de Chimie Moléculaire et Thioorganique, UMR CNRS 6507, INC3M, FR 3038, ENSICAEN & Université de Caen, 14050 Caen, France
| | - Mihaela Gulea
- Laboratoire de Chimie Moléculaire et Thioorganique, UMR CNRS 6507, INC3M, FR 3038, ENSICAEN & Université de Caen, 14050 Caen, France
| | - Jocelyne Levillain
- Laboratoire de Chimie Moléculaire et Thioorganique, UMR CNRS 6507, INC3M, FR 3038, ENSICAEN & Université de Caen, 14050 Caen, France
| |
Collapse
|
3
|
Pindinelli E, Pilati T, Troisi L. Synthesis and Rearrangement of 1,2,3-Triheteroaryl(aryl)-Substituted Aziridines. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700462] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
4
|
Roychowdhury A, Kumar VV, Bhaduri AP. Diarylimidoylcyanides, an Attractive Class of Intermediate: Novel Synthesis of α‐Anilino‐β‐Nitroenamines, N, N′‐ Disubstituted Amidines and Substituted Phenyl Glyoxate. SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397910500446902] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Abhijit Roychowdhury
- a Medicinal Chemistry Division , Central Drug Research Institute , Lucknow , India
| | - Versha V. Kumar
- a Medicinal Chemistry Division , Central Drug Research Institute , Lucknow , India
| | - A. P. Bhaduri
- a Medicinal Chemistry Division , Central Drug Research Institute , Lucknow , India
| |
Collapse
|
5
|
Petrova TD, Platonov VE. Polyfluoroaromatic compounds with a NCClR group—a reactive type of polyfluoroarene. J Fluor Chem 2005. [DOI: 10.1016/j.jfluchem.2005.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
6
|
Ohkura H, Handa M, Katagiri T, Uneyama K. Diastereoselective synthesis of S-tert-butyl-beta-(trifluoromethyl)isocysteine. J Org Chem 2002; 67:2692-5. [PMID: 11950320 DOI: 10.1021/jo016108u] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Both diastereoisomers of S-tert-butyl-beta-(trifluoromethyl)isocysteine have been synthesized stereoselectively by the sequential reactions of trifluoroacetimidoyl chloride with the lithium enolate of tert-butyl alpha-tert-butylthioacetate, followed by the diastereoselective reduction of the imino group with sodium borohydride in the presence of zinc(II) or di(ethylene glycol) dimethyl ether, and finally by the deprotection of N-aryl and tert-butyl ester groups.
Collapse
Affiliation(s)
- Hironari Ohkura
- Department of Applied Chemistry, Faculty of Engineering, Okayama University, Okayama 700-8530, Japan
| | | | | | | |
Collapse
|
7
|
Fustero S, Salavert E, Pina B, Ramı́rez de Arellano C, Asensio A. Novel strategy for the synthesis of fluorinated β-amino acid derivatives from Δ2-oxazolines. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00539-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
8
|
Abstract
The preparation of masked N-substituted beta-enamino acid derivatives 3a-n by reaction of 2-alkyl-oxa(thia)zolines 2a,b with imidoylbenzotriazoles 1a-g in the presence of LDA was described.
Collapse
Affiliation(s)
- A R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL 32611-7200, USA.
| | | | | |
Collapse
|
9
|
Fustero S, Díaz M, Carrió J, Aguilar E. C−C versus C−N Annulation Reactions of 2-Alkyl-2-oxazolines and 2-Alkyl-2-thiazolines: A Simple Synthesis of Novel 3-Aminoindene, Phthalimidine, Pyrrolidine, and Piperidine Derivatives. European J Org Chem 2001. [DOI: 10.1002/1099-0690(200103)2001:6<1195::aid-ejoc1195>3.0.co;2-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
10
|
Uneyama K, Ohkura H, Hao J, Amii H. A trial toward the synthesis of gamma-fluorinated beta-amino-alpha-thiohydroxyamino acid: a finding of desulfurizative C-C bond formation in thio-Wittig-type rearrangement of S-(N-aryl-trifluoroacetimidoyl)thioglycolates. J Org Chem 2001; 66:1026-9. [PMID: 11430067 DOI: 10.1021/jo0010330] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K Uneyama
- Department of Applied Chemistry, Faculty of Engineering, Okayama University, Okayama 700-8530, Japan.
| | | | | | | |
Collapse
|
11
|
|
12
|
Fustero S, Pina B, García de la Torre M, Navarro A, Ramírez de Arellano C, Simón A. First Highly Diastereoselective Synthesis of syn α-Methyl β-Fluoroalkyl β-Amino Esters. Org Lett 1999. [DOI: 10.1021/ol990774o] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Santos Fustero
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | - Belén Pina
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | - Marta García de la Torre
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | - Antonio Navarro
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | - Carmen Ramírez de Arellano
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | - Antonio Simón
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| |
Collapse
|
13
|
Fustero S, García De La Torre M, Pina B, Fuentes AS. New Strategies for the Synthesis of Fluorinated Vinylogous Amidines and beta-Enamino Ketones. J Org Chem 1999; 64:5551-5556. [PMID: 11674620 DOI: 10.1021/jo990392w] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reaction of fluorinated imidoyl chlorides 3 with ketimines 1a provides fluorinated 1,3-diimines, which were exclusively isolated as vinylogous amidine tautomers 2beta, with good yields. Fluorinated beta-enamino ketones 4 are obtained by regioselective hydrolysis of 2. Complementary methods for the synthesis of regioisomeric beta-enamino ketones 4 and 5 are also reported. These methods include the reaction of azaenolates of ketimines with fluorinated esters 6 and reactions of ketone enolates with fluorinated imidoyl chlorides 3. The behavior of these systems in hydrolysis reactions was also tested.
Collapse
Affiliation(s)
- Santos Fustero
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | | | | | | |
Collapse
|
14
|
Bertilsson SK, Tedenborg L, Alonso DA, Andersson PG. Chiral N,N‘- and N,O-Bidentate Anionic Ligands. Preparation, Metal Complexation, and Evaluation in the Asymmetric Aziridination of Olefins. Organometallics 1999. [DOI: 10.1021/om981016p] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sophie K. Bertilsson
- Department of Organic Chemistry, Institute of Chemistry, Uppsala University, Box 531, S-75121 Uppsala, Sweden
| | - Lars Tedenborg
- Department of Organic Chemistry, Institute of Chemistry, Uppsala University, Box 531, S-75121 Uppsala, Sweden
| | - Diego A. Alonso
- Department of Organic Chemistry, Institute of Chemistry, Uppsala University, Box 531, S-75121 Uppsala, Sweden
| | - Pher G. Andersson
- Department of Organic Chemistry, Institute of Chemistry, Uppsala University, Box 531, S-75121 Uppsala, Sweden
| |
Collapse
|
15
|
Synthesis and C-alkylation of C-protected β-enamino acid derivatives from oxa- thia- and imidazolines. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00042-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
16
|
|
17
|
Fustero S, García de la Torre M, Jofré, V, Carlón RP, Navarro A, Fuentes AS, Carrió JS. Synthesis and Reactivity of New β-Enamino Acid Derivatives: A Simple and General Approach to β-Enamino Esters and Thioesters. J Org Chem 1998. [DOI: 10.1021/jo9809480] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Santos Fustero
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | - Marta García de la Torre
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | - Viviana Jofré,
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | - Raquel Pérez Carlón
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | - Antonio Navarro
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | - Antonio Simón Fuentes
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| | - Juan Server Carrió
- Departamento de Química Inorgánica, Facultad de Farmacia, Universidad de Valencia, 46100-Burjassot (Valencia), Spain
| |
Collapse
|
18
|
Fustero S, Navarro A, Pina B, Asensio A, Bravo P, Crucianelli M, Volonterio A, Zanda M. Two Practical and Efficient Approaches to Fluorinated and Nonfluorinated Chiral beta-Imino Sulfoxides. J Org Chem 1998; 63:6210-6219. [PMID: 11672251 DOI: 10.1021/jo980336f] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reaction of fluorinated and nonfluorinated N-substituted imidoyl chlorides 1 with lithium derivatives of enantiopure methyl p-tolyl sulfoxide 2a (or racemic methyl phenyl sulfoxide 2b) gave a wide variety of chiral N-substituted beta-imino sulfoxides 4 in good to excellent yields. The title compounds (R)-4 were also prepared by aza-Wittig reaction of gamma-fluoro-beta-keto sulfoxides (R)-5 and N-aryl iminophosphoranes 6. The imino-enamino equilibrium was studied, showing, in all instances, the imino form as the predominant tautomer independent of the nature of the N-substituent. The configuration of the C=N double bond was found to be Z for both N-alkyl and N-aryl derivatives on the basis of (1)H NMR NOE difference experiments performed over several compounds. Ab initio calculations (HF/6-31G) carried out on several representative examples of 1 and 4 are, in general, consistent with the experimental results.
Collapse
Affiliation(s)
- Santos Fustero
- C.N.R.-Centro di Studio per le Sostanze Organiche Naturali, Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Tohda Y, Yanagidani T, Hiramatsu SI, Nishiwaki N, Tani K, Imagawa K, Ariga M. Synthesis via 2-Acylmethyl-2-oxazoline. I. A Novel Synthesis of 3-Acyl-2-pyridones by Michael Addition of 2-Acylmethyl-2-oxazoline toα,β-Acetylenic Ketones. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1997. [DOI: 10.1246/bcsj.70.2781] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
20
|
Fustero S, Pina B, Simón-Fuentes A. N-Substituted β-Enamino Acid Derivatives: A New Approach to Fluorinated β-Enamino Esters. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01549-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
21
|
Fustero S, Navarro A, Asensio A. A new and general synthesis of N-substituted fluorinated β-iminosulfoxides. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01051-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|