51
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Bai X, Wang L, Zhang Z, Zhang K, Bu Z, Wu Y, Zhang W, Wang Q. Unexpected Cascade Reactions of
Ortho
‐Hydroxyenaminones and β,γ‐Unsaturated α‐Ketoesters to Access Hydrogenated Benzoxazolepolycycles and Pyrrole−Phenol Atropisomers. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900950] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Xuguan Bai
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical EngineeringHenan University Kaifeng 475004 People's Republic of China
| | - Lele Wang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical EngineeringHenan University Kaifeng 475004 People's Republic of China
| | - Ziying Zhang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical EngineeringHenan University Kaifeng 475004 People's Republic of China
| | - Kuan Zhang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical EngineeringHenan University Kaifeng 475004 People's Republic of China
| | - Zhanwei Bu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical EngineeringHenan University Kaifeng 475004 People's Republic of China
| | - Yufeng Wu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical EngineeringHenan University Kaifeng 475004 People's Republic of China
| | - Wenjing Zhang
- College of ChemistryZhengzhou University Zhengzhou 450001 People's Republic of China
| | - Qilin Wang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical EngineeringHenan University Kaifeng 475004 People's Republic of China
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52
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Li X, Sun L, Zhang Q, Li S, Wang Y, Wei D, Zhang W, Lan Y. Mechanism and Substituent Effects of Benzene Arylation via a Phenyl Cation Strategy: A Density Functional Theory Study. ChemCatChem 2019. [DOI: 10.1002/cctc.201901120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Xiaoyan Li
- College of ChemistryZhengzhou University 100 Science Avenue Zhengzhou, Henan Province 450001 P.R. China
| | - Ling Sun
- Basic Teaching DepartmentHuanghe Jiaotong University Jiaozuo, Henan Province 454950 P. R. China
| | - Qiaochu Zhang
- College of ChemistryZhengzhou University 100 Science Avenue Zhengzhou, Henan Province 450001 P.R. China
| | - Shijun Li
- College of ChemistryZhengzhou University 100 Science Avenue Zhengzhou, Henan Province 450001 P.R. China
| | - Yang Wang
- Department of Material and Chemical EngineeringZhengzhou University of Light Industry 136 Science Avenue Zhengzhou, Henan Province 450002 P.R. China
| | - Donghui Wei
- College of ChemistryZhengzhou University 100 Science Avenue Zhengzhou, Henan Province 450001 P.R. China
| | - Wenjing Zhang
- College of ChemistryZhengzhou University 100 Science Avenue Zhengzhou, Henan Province 450001 P.R. China
| | - Yu Lan
- College of ChemistryZhengzhou University 100 Science Avenue Zhengzhou, Henan Province 450001 P.R. China
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53
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Yan M, Zhang Z, Zhou J, Li W, Zhang C, Zhang J, Wang H, Yang X, Fan S, Yang Z. Synthesis and DFT studies of novel aryloxymaleimides via nucleophilic substitution of tosyloxy group. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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54
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Opoku E, Tia R, Adei E. DFT mechanistic study on tandem sequential [4 + 2]/[3 + 2] addition reaction of cyclooctatetraene with functionalized acetylenes and nitrile imines. J PHYS ORG CHEM 2019. [DOI: 10.1002/poc.3992] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ernest Opoku
- Theoretical and Computational Chemistry Laboratory, Department of ChemistryKwame Nkrumah University of Science and Technology Kumasi Ghana
| | - Richard Tia
- Theoretical and Computational Chemistry Laboratory, Department of ChemistryKwame Nkrumah University of Science and Technology Kumasi Ghana
| | - Evans Adei
- Theoretical and Computational Chemistry Laboratory, Department of ChemistryKwame Nkrumah University of Science and Technology Kumasi Ghana
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55
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Unravelling the Mechanism and Selectivity of the NHC‐catalyzed Three‐Membered Ring‐Opening/Fluorination of Epoxy Enals: A DFT Study. ChemCatChem 2019. [DOI: 10.1002/cctc.201900424] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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56
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Liu Q, Sun L, Li S, Li X, Qu L, Lan Y, Wei D. Insights into N‐Heterocyclic Carbene (NHC)‐Catalyzed Asymmetric Addition of 2H‐Azirine with Aldehyde. Chem Asian J 2019; 14:2000-2007. [DOI: 10.1002/asia.201900076] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/14/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Qiuli Liu
- The College of Chemistry and Molecular EngineeringZhengzhou University No. 100 Kexue Street Zhengzhou Henan 450001 P. R. China
| | - Ling Sun
- Basic Teaching DepartmentHuanghe Jiaotong University No. 333 Yingbin Road Wuzhi Henan 454950 P. R. China
| | - Shi‐Jun Li
- The College of Chemistry and Molecular EngineeringZhengzhou University No. 100 Kexue Street Zhengzhou Henan 450001 P. R. China
| | - Xue Li
- The College of Chemistry and Molecular EngineeringZhengzhou University No. 100 Kexue Street Zhengzhou Henan 450001 P. R. China
| | - Ling‐Bo Qu
- The College of Chemistry and Molecular EngineeringZhengzhou University No. 100 Kexue Street Zhengzhou Henan 450001 P. R. China
| | - Yu Lan
- The College of Chemistry and Molecular EngineeringZhengzhou University No. 100 Kexue Street Zhengzhou Henan 450001 P. R. China
| | - Donghui Wei
- The College of Chemistry and Molecular EngineeringZhengzhou University No. 100 Kexue Street Zhengzhou Henan 450001 P. R. China
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57
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Bai H, Zhang H, Zhang X, Wang L, Li S, Wei D, Zhu Y, Zhang W. Unravelling the Origins of Hydroboration Chemoselectivity Inversion Using an N,O-Chelated Ir(I) Complex: A Computational Study. J Org Chem 2019; 84:6709-6718. [DOI: 10.1021/acs.joc.9b00329] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Huining Bai
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, P.R. China
| | - Huimin Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, P.R. China
| | - Xinchao Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, P.R. China
| | - Lidong Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, P.R. China
| | - Shijun Li
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, P.R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, P.R. China
| | - Yanyan Zhu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, P.R. China
| | - Wenjing Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, P.R. China
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58
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Li Y, Zhang Z. Mechanisms and Stereoselectivities of NHC-Catalyzed [3 + 4] Cycloaddition Reaction between Isatin-Derived Enal and N-(ortho
-Chloromethyl)aryl Amide. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900087] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yan Li
- School of Chemical Engineering; University of Science and Technology Liaoning; 114051 Anshan P. R. China
| | - Zhiqiang Zhang
- School of Chemical Engineering; University of Science and Technology Liaoning; 114051 Anshan P. R. China
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59
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Li X, Duan R, Wang Y, Qu LB, Li Z, Wei D. Insights into N-Heterocyclic Carbene-Catalyzed Oxidative α-C(sp 3)-H Activation of Aliphatic Aldehydes and Cascade [2 + 2] Cycloaddition with Ketimines. J Org Chem 2019; 84:6117-6125. [PMID: 31012584 DOI: 10.1021/acs.joc.9b00295] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Predicting the chemoselectivity of [2 + 2] cyclizations is an important challenge in organic chemistry. Herein, we provided a valuable case for this issue. Density functional theory calculations were performed to systematically study the possible mechanisms and origin of selectivities for the N-heterocyclic carbene (NHC)-catalyzed oxidative α-C(sp3)-H activation of aliphatic aldehydes and the cascade [2 + 2] cycloaddition with ketimines. The [2 + 2] cycloaddition of azolium enolate intermediates to the C═N bond, rather than the C═O bond of ketimine, is revealed to be determined by chemo- and stereoselectivity. By comparing the energy gap between the frontier molecular orbitals (FMOs) of the two reacting parts involved in the [2 + 2] cycloaddition transition states, we propose a new strategy to determine the origin of the reaction chemoselectivity. Moreover, the local nucleophilic index can efficiently predict the active site of ketimines. Further analyses illustrate that NHC can increase the nucleophilicity of aldehydes and the acidity of the α-C(sp3)-H bond, and 3,3',5,5'-tetra- tert-butyl diphenoquinone (DQ) acts as an oxidant and promotes α-C(sp3)-H bond deprotonation. This work is useful not only for understanding the NHC-catalyzed oxidative [2 + 2] annulation but also for developing new applications of the FMO theory in organocatalytic cyclizations.
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Affiliation(s)
- Xue Li
- The College of Chemistry and Molecular Engineering , Zhengzhou University , 100 Science Avenue , Zhengzhou , Henan 450001 , P. R. China
| | - Ruihong Duan
- The College of Chemistry and Molecular Engineering , Zhengzhou University , 100 Science Avenue , Zhengzhou , Henan 450001 , P. R. China
| | - Yanyan Wang
- The College of Chemistry and Molecular Engineering , Zhengzhou University , 100 Science Avenue , Zhengzhou , Henan 450001 , P. R. China
| | - Ling-Bo Qu
- The College of Chemistry and Molecular Engineering , Zhengzhou University , 100 Science Avenue , Zhengzhou , Henan 450001 , P. R. China
| | - Zhongjun Li
- The College of Chemistry and Molecular Engineering , Zhengzhou University , 100 Science Avenue , Zhengzhou , Henan 450001 , P. R. China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering , Zhengzhou University , 100 Science Avenue , Zhengzhou , Henan 450001 , P. R. China
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60
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Li Y, Zhang Z. Mechanism and stereoselectivity in NHC-catalyzed β-functionalization of saturated carboxylic ester. RSC Adv 2019; 9:7635-7644. [PMID: 35521168 PMCID: PMC9061211 DOI: 10.1039/c8ra10262g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 02/28/2019] [Indexed: 12/18/2022] Open
Abstract
To understand the mechanism and origin of the stereoselectivity of the [3 + 2] annulation reaction between a carboxylic ester and an isatin generating spirooxindole lactone catalyzed by N-heterocyclic carbene (NHC), density functional theory (DFT) calculations have been carried out. DFT results indicate that the catalytic cycle begins with the coupling of the catalyst with benzotriazole ester, followed by α-deprotonation to produce the enolate intermediate. The subsequent 1,4-proton transfer affords the homoenolate intermediate. The next crucial step is the stereoselective C-C bond formation. Then proton transfer takes place leading to the formation of the lactone intermediate. Finally, the elimination of the catalyst furnishes the final product. The presence of 1-hydroxybenzotriazole (HOBt) dramatically accelerates the proton transfer step. More importantly, HOBt has a non-negligible impact on stereoselective C-C bond formation, and the SR-configured product is the major stereoisomer of the annulation product, which is in good agreement with the experimental observations. The differential π⋯π stacking, C-H⋯π, lone pair (LP)⋯π and repulsion interactions are found to be responsible for the stereoselectivity. The obtained mechanistic insights should provide valuable information for understanding the important roles of the NHC catalyst and HOBt additive and be helpful for designing better NHC catalysts for this kind of reaction.
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Affiliation(s)
- Yan Li
- School of Chemical Engineering, University of Science and Technology Liaoning Anshan 114051 P. R. China +86-412-5929627 +86-18741219506
| | - Zhiqiang Zhang
- School of Chemical Engineering, University of Science and Technology Liaoning Anshan 114051 P. R. China +86-412-5929627 +86-18741219506
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61
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Li S, Tang Z, Wang Y, Wang D, Wang Z, Yu C, Li T, Wei D, Yao C. NHC-Catalyzed Aldol-Like Reactions of Allenoates with Isatins: Regiospecific Syntheses of γ-Functionalized Allenoates. Org Lett 2019; 21:1306-1310. [DOI: 10.1021/acs.orglett.8b04082] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sha Li
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China
| | - Ziwei Tang
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China
| | - Yang Wang
- The College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, P R China
| | - Dan Wang
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China
| | - Zhanlin Wang
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China
| | - Chenxia Yu
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China
| | - Tuanjie Li
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, P R China
| | - Changsheng Yao
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China
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62
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Deng Z, Wang Y, Mou D, Sun Y, Da H, Gao J. Theoretical investigation on acetylene cyclotrimerization catalysed by TiO2and Ti. J PHYS ORG CHEM 2019. [DOI: 10.1002/poc.3934] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Zhe‐Peng Deng
- College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou China
- Running Maintenance DepartmentGansu Computing Center Lanzhou China
| | - Yong‐Cheng Wang
- College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou China
| | - Dan Mou
- Huining, No. 1 Middle School Huining County China
| | - Yu Sun
- Experiment Center of Northwest University for Nationalities Lanzhou China
| | - Hu Da
- Running Maintenance DepartmentGansu Computing Center Lanzhou China
| | - Jian‐De Gao
- Gansu University of Chinese Medicine Lanzhou China
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63
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Motaghi M, Khosravi H, Balalaie S, Rominger F. Catalytic formal [4 + 1] isocyanide-based cycloaddition: an efficient strategy for the synthesis of 1H-cyclopenta[b]quinolin-1-one derivatives. Org Biomol Chem 2019; 17:275-282. [PMID: 30539949 DOI: 10.1039/c8ob02857e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
An unprecedented catalytic isocyanide-based cycloaddition of alkyl and aryl isocyanides with (Z)-2-(2-hydroxy-2-alkylvinyl)quinoline-3-carbaldehydes was developed for the direct and efficient synthesis of 1H-cyclopenta[b]quinolin-1-one derivatives. On the basis of DFT calculations, a mechanism is proposed involving formal [4 + 1] cycloaddition of isocyanides, followed by imine-enamine tautomerization and air oxidation.
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Affiliation(s)
- Milad Motaghi
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, P. O. Box 15875-4416, Tehran, Iran.
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64
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Zhang K, Han H, Wang L, Zhang Z, Wang Q, Zhang W, Bu Z. An unexpected cascade reaction of 3-hydroxyoxindoles with coumarin-3-carboxylates to construct 2,3-dihydrobenzofuran spirooxindoles. Chem Commun (Camb) 2019; 55:13681-13684. [DOI: 10.1039/c9cc07114h] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
An unexpected Michael addition-inspired ring-opening/closure cascade reaction of 3-hydroxyoxindoles with coumarin-3-carboxylates was developed.
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Affiliation(s)
- Kuan Zhang
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- China
| | - Huabin Han
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- China
| | - Lele Wang
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- China
| | - Ziying Zhang
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- China
| | - Qilin Wang
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- China
| | - Wenjing Zhang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Zhanwei Bu
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- China
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65
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Murugesh N, Haribabu J, Arumugam K, Balachandran C, Swaathy R, Aoki S, Sreekanth A, Karvembu R, Vedachalam S. NHC-catalyzed green synthesis of functionalized chromones: DFT mechanistic insights and in vitro activities in cancer cells. NEW J CHEM 2019. [DOI: 10.1039/c9nj02650a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A simple green protocol for the synthesis of 3-aminochromone derivatives using a NHC catalyzed intramolecular hydroacylation reaction was developed. Further functional 3-aminochromes were evaluated for their anticancer activity.
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Affiliation(s)
- Nithya Murugesh
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
| | - Jebiti Haribabu
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
| | | | | | - Rajagopal Swaathy
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
| | - Shin Aoki
- Faculty of Pharmaceutical Sciences
- Tokyo University of Science
- 2641 Yamazaki
- Japan
- Research Institute of Science and Technology
| | - Anandaram Sreekanth
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
| | - Ramasamy Karvembu
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
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66
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Wang Y, Wu QY, Lai TH, Zheng KJ, Qu LB, Wei D. Prediction on the origin of selectivities of NHC-catalyzed asymmetric dearomatization (CADA) reactions. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02238k] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The mechanism and origin of selectivities of NHC-catalyzed dearomatization reaction have been theoretically studied.
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Affiliation(s)
- Yang Wang
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Qiu-Yu Wu
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Tian-Hua Lai
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Kai-Jun Zheng
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Ling-Bo Qu
- College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P.R. China
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67
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Zhang QC, Li X, Wang X, Li SJ, Qu LB, Lan Y, Wei D. Insights into highly selective ring expansion of oxaziridines under Lewis base catalysis: a DFT study. Org Chem Front 2019. [DOI: 10.1039/c8qo01370e] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The possible mechanism and stereoselectivity of the NHC-catalyzed ring expansion reaction of oxaziridines have been theoretically studied for the first time.
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Affiliation(s)
- Qiao-Chu Zhang
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Xue Li
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Xinghua Wang
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Shi-Jun Li
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Ling-Bo Qu
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Yu Lan
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
- School of Chemistry and Chemical Engineering
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
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68
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Gao J, Wang Y. Mechanistic studies on the N-heterocyclic carbene-catalyzed reaction of isatin-derived enals with hydrazones. Org Biomol Chem 2019; 17:7442-7447. [DOI: 10.1039/c9ob01317b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The detailed mechanism and origin of stereoselectivity of the NHC-catalyzed annulation reaction were investigated.
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Affiliation(s)
- Jinxin Gao
- Department of Cooking Food
- Henan Polytechnic
- Zhengzhou
- P. R. China
| | - Yang Wang
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P. R. China
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69
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Zhao M, Xiao Y, Qiao Y. Mechanistic insights and origin of chemoselectivity for S–O bond cleavage in dinitrobenzenesulfonic carbamates. NEW J CHEM 2019. [DOI: 10.1039/c9nj03770e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A computational study on the NHC-catalyzed chemoselective S–O bond cleavage in dinitrobenzenesulfonic carbamates.
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Affiliation(s)
- Miao Zhao
- Department of Pathophysiology
- School of Basic Medical Sciences
- Zhengzhou University
- Zhengzhou
- China
| | - Yang Xiao
- Department of Pathophysiology
- School of Basic Medical Sciences
- Zhengzhou University
- Zhengzhou
- China
| | - Yan Qiao
- Department of Pathophysiology
- School of Basic Medical Sciences
- Zhengzhou University
- Zhengzhou
- China
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70
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Li S, Yao Y, Tang Z, Sun B, Yu C, Li T, Yao C. An enantioselective assembly of naphthopyran via NHC-catalyzed [3 + 3] annulation of bromoenal with β-tetralone. Org Biomol Chem 2019; 17:268-274. [DOI: 10.1039/c8ob02192a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An asymmetric assembly of naphthopyran was realized via the N-heterocyclic carbene (NHC)-catalyzed formal [3 + 3] annulation of bromoenal and β-tetralone. The key advantages of this protocol include ready availability of starting materials, mild reaction conditions, good yields.
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Affiliation(s)
- Sha Li
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Yibiao Yao
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Ziwei Tang
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Baomin Sun
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Chenxia Yu
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Tuanjie Li
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Changsheng Yao
- School of Chemistry and Materials Science
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
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71
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Yan CX, Wu RZ, Lu K, Yang FL, Yang XS, Wang R, Yang X, Zhou PP, Shao X. Why electrostatically enhanced thiourea is better than Schreiner's thiourea in both catalytic activity and regioselectivity? Org Chem Front 2019. [DOI: 10.1039/c9qo00251k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrostatically enhanced thiourea is more active and efficient than Schreiner's thiourea in the ring-opening aminolysis of styrene oxide with aniline, and the underlying reasons were explored by DFT calculations.
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Affiliation(s)
- Chao-Xian Yan
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Rui-Zhi Wu
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Ka Lu
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Fang-Ling Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Xiao-Shan Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Rui Wang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Xing Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Pan-Pan Zhou
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Xiangfeng Shao
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
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72
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Shi Q, Wang W, Wang Y, Lan Y, Yao C, Wei D. Prediction on the origin of chemoselectivity in Lewis base-mediated competition cyclizations between allenoates and chalcones: a computational study. Org Chem Front 2019. [DOI: 10.1039/c9qo00606k] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The HOMOTSs and p-orbital contributions of the center atoms were used to predict the origin of chemoselectivity in this work.
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Affiliation(s)
- Qianqian Shi
- College of Chemistry and Molecular Engineering
- and School of Basic Medical Sciences
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Wei Wang
- College of Chemistry and Molecular Engineering
- and School of Basic Medical Sciences
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Yang Wang
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P. R. China
| | - Yu Lan
- College of Chemistry and Molecular Engineering
- and School of Basic Medical Sciences
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Changsheng Yao
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials
- School of Chemistry & Materials Science
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering
- and School of Basic Medical Sciences
- Zhengzhou University
- Zhengzhou
- P. R. China
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73
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Bai H, Zhang H, Guo Y, Chen H, Wei D, Li S, Zhu Y, Zhang W. Understanding theZselectivity of the metal-free intermolecular aminoarylation of alkynes: a DFT study. Org Chem Front 2019. [DOI: 10.1039/c8qo01093e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The unusualZselectivity of the title reaction is revealed to be determined by the inherent requirements of dynamic preference of pathways that promise theZ-geometry product, rather than the isomerization of theE-productin situ.
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Affiliation(s)
- Huining Bai
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Huimin Zhang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Yuen Guo
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Hui Chen
- Institute of Chemistry, Henan Academy of Sciences
- Zhengzhou 450002
- P.R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Shijun Li
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Yanyan Zhu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Wenjing Zhang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
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74
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Li X, Li SJ, Wang Y, Wang Y, Qu LB, Li Z, Wei D. Insights into NHC-catalyzed oxidative α-C(sp3)–H activation of aliphatic aldehydes and cascade [2 + 3] cycloaddition with azomethine imines. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00526a] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The NHC catalyst is identified to promote [2 + 3] cycloaddition by avoiding the poor FMO overlap mode in theory.
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Affiliation(s)
- Xue Li
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Shi-Jun Li
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Yanyan Wang
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Yang Wang
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Ling-Bo Qu
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Zhongjun Li
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
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75
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Wang Y, Qu L, Wei D. Prediction on the Origin of Selectivities in Base‐controlled Switchable NHC‐catalyzed Transformations. Chem Asian J 2018; 14:293-300. [DOI: 10.1002/asia.201801583] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 11/28/2018] [Indexed: 12/26/2022]
Affiliation(s)
- Yang Wang
- Department of Material and Chemical EngineeringZhengzhou University of Light Industry 136 Science Avenue Zhengzhou Henan Province 450002 P. R. China
| | - Ling‐Bo Qu
- College of Chemistry and Molecular EngineeringZhengzhou University 100 Science Avenue Zhengzhou Henan Province 450002 P. R. China
| | - Donghui Wei
- College of Chemistry and Molecular EngineeringZhengzhou University 100 Science Avenue Zhengzhou Henan Province 450002 P. R. China
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76
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Selg C, Kraft FB, Welcke L, Zeitler K. A Catalytic Strategy for α,ω‐Functionalization: NHC‐Mediated Fragmentation/Umpolung Cascades to Access Hydroxytrifluoromethyl Ynones and Allenones. ChemCatChem 2018. [DOI: 10.1002/cctc.201801454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Christoph Selg
- Institut für Organische ChemieUniversität Leipzig Johannisallee 29 04103 Leipzig Germany
| | - Fabian B. Kraft
- Institut für Organische ChemieUniversität Leipzig Johannisallee 29 04103 Leipzig Germany
| | - Linda Welcke
- Institut für Organische ChemieUniversität Leipzig Johannisallee 29 04103 Leipzig Germany
| | - Kirsten Zeitler
- Institut für Organische ChemieUniversität Leipzig Johannisallee 29 04103 Leipzig Germany
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77
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Luo Z, Gao Z, Zhang C, Chen K, Ye S. Enantioselective Synthesis of Cyclic α‐Aminophosphonates through N‐Heterocyclic Carbene‐Catalyzed [4+2] Annulation of Enals with α‐Iminophosphonates. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800604] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhi Luo
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and Function CAS Research/Education Center for Excellence in Molecular SciencesInstitute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Zhong‐Hua Gao
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and Function CAS Research/Education Center for Excellence in Molecular SciencesInstitute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Chun‐Lin Zhang
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and Function CAS Research/Education Center for Excellence in Molecular SciencesInstitute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Kun‐Quan Chen
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and Function CAS Research/Education Center for Excellence in Molecular SciencesInstitute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Song Ye
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and Function CAS Research/Education Center for Excellence in Molecular SciencesInstitute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
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78
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Liu C, Sang S, Chen F, Yan Y, Zhang C, Huang W. Me3
SiBr/InCl3
catalyzed allylation of alcohols: Identifying the combined Lewis structure and investigating the reaction mechanism. J PHYS ORG CHEM 2018. [DOI: 10.1002/poc.3902] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Changmei Liu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Nanjing Tech University (NanjingTech); Nanjing People's Republic of China
| | - Shenglong Sang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Nanjing Tech University (NanjingTech); Nanjing People's Republic of China
| | - Fei Chen
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Nanjing Tech University (NanjingTech); Nanjing People's Republic of China
| | - Yan Yan
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Nanjing Tech University (NanjingTech); Nanjing People's Republic of China
| | - Cong Zhang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Nanjing Tech University (NanjingTech); Nanjing People's Republic of China
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Nanjing Tech University (NanjingTech); Nanjing People's Republic of China
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79
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Liu Q, Li SJ, Li. X, Qu LB, Wei D. A Computational Study on the 4-Dimethylaminopyridine (DMAP)-Catalyzed Regioselective [2+4] Cyclization of Allenic Ester with Cyclic Ketimine. ChemistrySelect 2018. [DOI: 10.1002/slct.201802267] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Qiuli Liu
- The College of Chemistry and Molecular Engineering; Center of Computational Chemistry; Zhengzhou University; 100 Science Avenue Zhengzhou Henan Province 450001 P. R. China
| | - Shi-Jun Li
- The College of Chemistry and Molecular Engineering; Center of Computational Chemistry; Zhengzhou University; 100 Science Avenue Zhengzhou Henan Province 450001 P. R. China
| | - Xue Li.
- The College of Chemistry and Molecular Engineering; Center of Computational Chemistry; Zhengzhou University; 100 Science Avenue Zhengzhou Henan Province 450001 P. R. China
| | - Ling-Bo Qu
- The College of Chemistry and Molecular Engineering; Center of Computational Chemistry; Zhengzhou University; 100 Science Avenue Zhengzhou Henan Province 450001 P. R. China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering; Center of Computational Chemistry; Zhengzhou University; 100 Science Avenue Zhengzhou Henan Province 450001 P. R. China
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80
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Zhang PH, Pu M, Gao Y, Zhang YF, Lei M, Yang ZY. Theoretical Study of the Histidine-catalyzed Asymmetric Aldol Reaction of Acetone and Benzaldehyde. J Phys Chem A 2018; 122:7842-7851. [PMID: 30188712 DOI: 10.1021/acs.jpca.8b07229] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The mechanism of histidine-catalyzed asymmetrical aldol reaction of acetone with benzaldehyde was studied by using B3LYP method of density functional theory at the levels of 6-31G(d,p) and cc-pvdz basis sets. The calculation results showed that the reaction mechanism included four steps: (I) nucleophilic attack of histidine on acetone to form alcohol intermediate Inter-A through the transition state TS1 (considered a rate control step because the activation energy (49.95 kcal/mol) was relatively high); (II) dehydration of the alcohol intermediate to form the cis- or trans-enamine through the transition states TS3 and TS4 with the energy barriers of 36.12 and 38.15 kcal/mol; (III) electrophilic addition of cis-enamine or trans-enamine with benzaldehyde to form imine Inter-C or Inter-E through the transition states TS8, TS9, TS10, and TS11 (energy barriers 18.43, 22.34, 13.24, and 13.24 kcal/mol, respectively); (IV) after combination of the imine intermediate with water through the transition states TS12, TS13, TS14, and TS15 (energy barriers 22.79, 34.6, 28.2, 25.12 kcal/mol, respectively), removal of the histidine catalys to obtain the final S or R aldol product. Through analyzing the potential energy profile of reaction, we found that the histidine-catalyzed reaction of acetone with benzaldehyde was more energetically favorable to obtain the R-product (ee value >99%). Solvent effects computed with a polarizable continuum model (PCM) indicated that the DMSO and water can reduce the reaction energy barrier.
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Affiliation(s)
- Pei-Huan Zhang
- State Key Laboratory of Chemical Resource Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
| | - Min Pu
- State Key Laboratory of Chemical Resource Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
| | - Yang Gao
- State Key Laboratory of Chemical Resource Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
| | - Yu-Feng Zhang
- State Key Laboratory of Chemical Resource Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
| | - Ming Lei
- State Key Laboratory of Chemical Resource Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
| | - Zuo-Yin Yang
- State Key Laboratory of Chemical Resource Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
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81
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Liu N, Xie YF, Wang C, Li SJ, Wei D, Li M, Dai B. Cooperative Multifunctional Organocatalysts for Ambient Conversion of Carbon Dioxide into Cyclic Carbonates. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01925] [Citation(s) in RCA: 145] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ning Liu
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, North Fourth Road, Shihezi, Xinjiang 832003, People’s Republic of China
| | - Ya-Fei Xie
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, North Fourth Road, Shihezi, Xinjiang 832003, People’s Republic of China
| | - Chuan Wang
- Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, People’s Republic of China
| | - Shi-Jun Li
- College of Chemistry and Molecular Engineering, Center of Computational Chemistry, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering, Center of Computational Chemistry, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Min Li
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, North Fourth Road, Shihezi, Xinjiang 832003, People’s Republic of China
| | - Bin Dai
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, North Fourth Road, Shihezi, Xinjiang 832003, People’s Republic of China
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82
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Zaragozá RJ, Aurell MJ, González-Cardenete MA. A theoretical study on NHC-catalysed enantioselective cycloaddition of ketenes and 3-aroylcoumarins: mechanism and enantioselectivity. Org Biomol Chem 2018; 16:5474-5482. [PMID: 30022178 DOI: 10.1039/c8ob01035h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
NHC-catalysed enantioselective cycloaddition of ketenes to 3-aroylcoumarins to yield dihydrocoumarin-fused dihydropyranones has been investigated using DFT methods at the B3LYP/6-31G* and MPWB1K/6-311G** computational levels. Two plausible mechanisms have been studied: the "ketene-first" mechanism A and the "coumarin-first" mechanism B. An analysis of the activation Gibbs free energies involved in the two competitive pathways makes it possible to rule out the pathway associated with the "coumarin-first" mechanism B. The first step of the "ketene-first" mechanism A is the formation of zwitterionic intermediate IN1-Zvia a nucleophilic attack of NHC 1 on ketene 2. A [4 + 2] cycloaddition through the nucleophilic attack of enolate IN1-Z on the conjugated double bond of the benzoyl group of coumarin 3, viaTS3-SS-a2 or TS3-RR-a2, yields IN3. Finally, the extrusion of the catalyst through TS5 leads to the final products, either 4-SS or 4-RR. Enantioselectivity observed in the experimental results is determined in the transition states TS3-SS-a2/TS3-RR-a2. In this pathway, the intramolecular hydrogen-bonding between the hydroxyl group of the IN1-Z adduct and the carbonyl oxygen of the original ketene group directs the final stereochemistry throughout the entire process.
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Affiliation(s)
- Ramón J Zaragozá
- Departamento de Química Orgánica, Universidad de Valencia, Dr. Moliner 50, 46100 Burjassot, Valencia, Spain.
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83
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Li X, Wang Y, Wang Y, Tang M, Qu LB, Li Z, Wei D. Insights into the N-Heterocyclic Carbene (NHC)-Catalyzed Oxidative γ-C(sp 3)-H Deprotonation of Alkylenals and Cascade [4 + 2] Cycloaddition with Alkenylisoxazoles. J Org Chem 2018; 83:8543-8555. [PMID: 29927597 DOI: 10.1021/acs.joc.8b01112] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The N-heterocyclic carbene (NHC)-catalyzed oxidative C-H deprotonations have attracted increasing attention; however, the general mechanism regarding this kind of oxidative organocatalysis remains unclear. In this paper, the competing mechanisms and origin of the stereoselectivity of the NHC-catalyzed oxidative γ-C(sp3)-H deprotonation of alkylenals and cascade [4 + 2] cycloaddition with alkenylisoxazoles were systematically investigated for the first time using density functional theory (DFT). The computed results indicate that the oxidation of the Breslow intermediate by 3,3',5,5'-tetra- tert-butyl diphenoquinone (DQ) via a hydride transfer to oxygen (HTO) pathway is the most favorable among the four competing pathways. In addition, the analyses demonstrate that oxidant DQ plays a double role, i.e., strengthening the acidity of the hydrogen of the γ-carbon of alkylenal and forming π···π interactions with conjugated C═C bonds to promote the γ-C(sp3)-H deprotonation. The NHC catalyst acts as a Lewis base, and the hydrogen-bond network between the NHC and the substrate formed in the key Michael addition step is responsible for the origin of the stereoselectivity. Further DFT calculations reveal that the nonpolar solvent can stabilize the nonpolar R isomer but destabilize the polar S isomer for the stereoselectivity-determining transition states, thus improving the stereoselectivity.
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84
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Li X, Tang M, Wang Y, Wang Y, Li Z, Qu LB, Wei D. Insights into the N-Heterocyclic Carbene (NHC)-Catalyzed Intramolecular Cyclization of Aldimines: General Mechanism and Role of Catalyst. Chem Asian J 2018; 13:1710-1718. [PMID: 29667337 DOI: 10.1002/asia.201800313] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/02/2018] [Indexed: 12/14/2022]
Abstract
One of the most challenging questions in the Lewis base organocatalyst field is how to predict the most electrophilic carbon for the complexation of N-heterocyclic carbene (NHC) and reactant. This study provides a valuable case for this issue. Multiple mechanisms (A, B, C, D, and E) for the intramolecular cyclization of aldimine catalyzed by NHC were investigated by using density functional theory (DFT). The computed results reveal that the NHC energetically prefers attacking the iminyl carbon (AIC mode, which is associated with mechanisms A and C) rather than attacking the olefin carbon (AOC mode, which is associated with mechanisms B and D) or attacking the carbonyl carbon (ACC mode, which is associated with mechanism E) of aldimine. The calculated results based on the different reaction models indicate that mechanism A (AIC mode), which is associated with the formation of the aza-Breslow intermediate, is the most favorable pathway. For mechanism A, there are five steps: (1) nucleophilic addition of NHC to the iminyl carbon of aldimine; (2) [1,2]-proton transfer to form an aza-Breslow intermediate; (3) intramolecular cyclization; (4) the other [1,2]-proton transfer; and (5) regeneration of NHC. The analyses of reactivity indexes have been applied to explain the chemoselectivity, and the general principles regarding the possible mechanisms would be useful for the rational design of NHC-catalyzed chemoselective reactions.
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Affiliation(s)
- Xue Li
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
| | - Mingsheng Tang
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
| | - Yanyan Wang
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
| | - Yang Wang
- Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, No. 100 Kexue Street, Zhengzhou, Henan, 450002, P. R. China
| | - Zhongjun Li
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
| | - Ling-Bo Qu
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Kexue Street, Zhengzhou, Henan, 450001, P. R. China
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85
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Zhang H, Xu H, Bai H, Wei D, Zhu Y, Zhang W. Theoretical study on the mechanism and enantioselectivity of NHC-catalyzed intramolecular SN2′ nucleophilic substitution: what are the roles of NHC and DBU? Org Chem Front 2018. [DOI: 10.1039/c8qo00129d] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A possible catalytic mechanism was proposed and studied in very detail by using the DFT method for a recently reported enantioselective intramolecular SN2′ substitution of aldehydes with trisubstituted allylic bromides.
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Affiliation(s)
- Huimin Zhang
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Hao Xu
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Huining Bai
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Yanyan Zhu
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Wenjing Zhang
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
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86
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Ma D, Song Y, Fu C, Zhang F, Guo Y, Huang X, Ma S. E-Selective N-heterocyclic carbene-catalyzed reaction of aldehydes and butadienoates: effect of water and chloroform as the proton shuttle. Org Chem Front 2018. [DOI: 10.1039/c8qo00579f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
An N-heterocyclic carbene-catalyzed reaction of aldehydes and butadienoates affording (E)-4-oxo-2-butenoates highly stereoselectively has been developed. Some key intermediates have been detected by an MS study.
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Affiliation(s)
- Dengke Ma
- Laboratory of Molecular Recognition and Synthesis
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Yulong Song
- Laboratory of Molecular Recognition and Synthesis
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Chunling Fu
- Laboratory of Molecular Recognition and Synthesis
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Fang Zhang
- State Key Laboratory of Organometallic Chemistry and National Center for Organic Mass Spectrometry in Shanghai
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Yinlong Guo
- State Key Laboratory of Organometallic Chemistry and National Center for Organic Mass Spectrometry in Shanghai
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Xin Huang
- Laboratory of Molecular Recognition and Synthesis
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Shengming Ma
- Laboratory of Molecular Recognition and Synthesis
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- P. R. China
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87
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Bai H, Xu H, Zhang H, Guo Y, Shan J, Wei D, Zhu Y, Zhang S, Zhang W. Theoretical investigations of the Ir-catalyzed direct borylation of B(3,6)–H of o-carborane: the actual catalyst, mechanism, and origin of regioselectivity. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01322e] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The IrIII species is proved to be the actual catalyst. The electron-delocalized structure and the inductive effects of the carbon centers is account for the regioselectivity.
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Affiliation(s)
- Huining Bai
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Hao Xu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Huimin Zhang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Yuen Guo
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Jiankai Shan
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Yanyan Zhu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Shouren Zhang
- Henan Provincial Key Laboratory of Nanocomposites and Applications
- Institute of Nanostructured Functional Materials
- Huanghe Science and Technology College
- Zhengzhou
- China
| | - Wenjing Zhang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
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88
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Wang Y, Wang Y, Wang X, Li X, Qu LB, Wei D. Competing mechanisms and origins of chemo- and stereo-selectivities of NHC-catalyzed reactions of enals with 2-aminoacrylates. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01272e] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A DFT study on competing mechanisms of NHC-catalyzed reactions of enals with 2-aminoacrylates has been performed for the first time.
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Affiliation(s)
- Yang Wang
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Yanyan Wang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Xinghua Wang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Xue Li
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Ling-Bo Qu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
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89
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Shi Q, Wang Y, Wang Y, Qu LB, Qiao Y, Wei D. Insights into N-heterocyclic carbene-catalyzed [3 + 4] annulation reactions of 2-bromoenals with N-Ts hydrazones. Org Chem Front 2018. [DOI: 10.1039/c8qo00716k] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A DFT study toward N-heterocyclic carbene-catalyzed [3 + 4] annulation reactions of 2-bromoenals has been performed for the first time.
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Affiliation(s)
- Qianqian Shi
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Yang Wang
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Yanyan Wang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Ling-Bo Qu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Yan Qiao
- School of Basic Medical Sciences
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
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90
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Wang Y, Zhang SR, Wang Y, Qu LB, Wei D. Insights into the NHC-catalyzed cascade Michael/aldol/lactamization reaction: mechanism and origin of stereoselectivity. Org Chem Front 2018. [DOI: 10.1039/c8qo00398j] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A DFT study of the NHC-catalyzed cascade Michael/aldol/lactamization reaction has been performed for the first time.
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Affiliation(s)
- Yang Wang
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Shou-Ren Zhang
- Henan Provincial Key Laboratory of Nanocomposites and Applications
- Institute of Nanostructured Functional Materials
- Huanghe Science and Technology College
- Zhengzhou
- China
| | - Yanyan Wang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Ling-Bo Qu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
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91
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Yan CX, Zhou PP, Yang FL, Wu RZ, Yang X, Yang F, Shao X. Chiral bisoxazoline catalyzed decarboxylative aldol reactions between β-carbonyl acids and trifluoroacetaldehyde hemiacetals as well as trifluoroacetaldehyde: the mechanism, the origin of enantioselectivity and the role of a catalyst. Org Chem Front 2018. [DOI: 10.1039/c8qo00578h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The role of a catalyst in the decarboxylative aldol reactions between β-carbonyl acids and trifluoroacetaldehyde hemiacetals as well as trifluoroacetaldehyde catalyzed by chiral bisoxazoline were unveiled theoretically.
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Affiliation(s)
- Chao-Xian Yan
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Pan-Pan Zhou
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Fang-Ling Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Rui-Zhi Wu
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Xing Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Fan Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Xiangfeng Shao
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
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92
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Wang FR, Li ZY, Wei DH, Niu YY, Hou HW, Wu BL. The conformational behavior of multivalent tris(imidazolium)cyclophanes in the hybrids with metal (pseudo)halides or polyoxometalates. CrystEngComm 2018. [DOI: 10.1039/c8ce01372a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Three 3D imidazole or benzimidazole-bearing cages as trivalent cationic templates react with metal (pseudo)halides or polyoxometalates to obtain a series of different organic–inorganic hybrids in which the cages exhibit breathing behavior of expansion and contraction.
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Affiliation(s)
- Fu-Rong Wang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- P. R. China
| | - Zi-Yan Li
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- P. R. China
| | - Dong-Hui Wei
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- P. R. China
| | - Yun-Yin Niu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- P. R. China
| | - Hong-Wei Hou
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- P. R. China
| | - Ben-Lai Wu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- P. R. China
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93
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Lin JB, Cheng XN, Tian XD, Xu GQ, Luo YC, Xu PF. A C1-symmetric N-heterocyclic carbene catalysed oxidative spiroannulation of isatin-derived enals: highly enantioselective synthesis of spirooxindole δ-lactones. RSC Adv 2018; 8:15444-15447. [PMID: 35539478 PMCID: PMC9080099 DOI: 10.1039/c8ra02009d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 04/02/2018] [Indexed: 01/04/2023] Open
Abstract
A C1-symmetric N-heterocyclic carbene (NHC)-catalysed activation of isatin-derived enals under oxidative conditions was achieved. The in situ generated α,β-unsaturated acyl azolium species was efficiently trapped by 1,3-dicarbonyl compounds via a Michael addition/spiroannualtion cascade, delivering a series of synthetically important spirooxindole δ-lactones with up to 96% enantioselectivity. A NHC-catalysed spiroannulation of isatin-derived enals and 1,3-dicarbonyl compounds has been developed, enabling enantioselective synthesis of synthetically important spirooxindole δ-lactones.![]()
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Affiliation(s)
- Jun-Bing Lin
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xi-Na Cheng
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xiao-Dong Tian
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Yong-Chun Luo
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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94
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Tu PC, Zhou L, Kirillov AM, Fang R, Yang L. Computational study on the NHC-catalyzed synthesis of 2,3-disubstituted indoles: mechanism, key intermediate and the role of the catalyst. Org Chem Front 2018. [DOI: 10.1039/c8qo00139a] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Mechanism, key intermediate and role of NHC for NHC-catalyzed umpolung of imines are clarified through our calculations.
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Affiliation(s)
- Peng-Cheng Tu
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Lin Zhou
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Alexander M. Kirillov
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Universidade de Lisboa
- Lisbon
| | - Ran Fang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Lizi Yang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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95
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Wang Y, Wei D, Tang M. Computational Study on γ-C–H Functionalization of α,β-Unsaturated Ester Catalyzed by N-Heterocyclic Carbene: Mechanisms, Origin of Stereoselectivity, and Role of Catalyst. J Org Chem 2017; 82:13043-13050. [DOI: 10.1021/acs.joc.7b01992] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Yang Wang
- Department
of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan Province 450002, People’s Republic of China
| | - Donghui Wei
- The
College of Chemistry and Molecular Engineering, Center of Computational
Chemistry, Zhengzhou University, Zhengzhou, Henan Province 450001, People’s Republic of China
| | - Mingsheng Tang
- The
College of Chemistry and Molecular Engineering, Center of Computational
Chemistry, Zhengzhou University, Zhengzhou, Henan Province 450001, People’s Republic of China
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