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Zhou S, Zhang Z, Bai D, Li J, Cui X, Xu ZJ, Tang Y, Tang X, Liu W. A Discrete 3d-4f Metallacage as an Efficient Catalytic Nanoreactor for a Three-Component Aza-Darzens Reaction. Inorg Chem 2022; 61:4009-4017. [PMID: 35188386 DOI: 10.1021/acs.inorgchem.1c03729] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The exploration and development of coordination nanocages can provide an approach to control chemical reactions beyond the bounds of the flask, which has aroused great interest due to their significant applications in the field of molecular recognition, supramolecular catalysis, and molecular self-assembly. Herein, we take the advantage of a semirigid and nonsymmetric bridging ligand (H5L) with rich metal-chelating sites to construct an unusual and discrete 3d-4f metallacage, [Zn2Er4(H2L)4(NO3)Cl2(H2O)]·NO3·xCH3OH·yH2O (Zn2Er4). The 3d-4f Zn2Er4 cage possesses a quadruple-stranded structure, and all of the ligands wrap around an open spherical cavity within the core. The self-assembly of the unique cage not only ensures the structural stability of the Zn2Er4 cage as a nanoreactor in solution but also makes the bimetallic lanthanide cluster units active sites that are exposed in the medium-sized cavity. It is important to note that the Zn2Er4 cage as a homogeneous catalyst has been successfully applied to catalyze three-component aza-Darzens reactions of formaldehyde, anilines, and α-diazo esters without another additive under mild conditions, displaying better catalytic activity, higher specificity, short reaction time, and low catalyst loadings. A possible mechanism for this three-component aza-Darzens reaction catalyzed by the Zn2Er4 cage has been proposed. These experimental results have demonstrated the great potential of the discrete 3d-4f metallacage as a host nanoreactor for the development of supramolecular or molecular catalysis.
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Affiliation(s)
- Shengbin Zhou
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Zhichao Zhang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Dongjie Bai
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Jingzhe Li
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Xiang Cui
- College of Chemistry and Chemical Engineering, Qinghai Normal University, Xining 810016, People's Republic of China
| | - Zhichuan J Xu
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Yu Tang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Xiaoliang Tang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Weisheng Liu
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China
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Ashokkumar V, Siva A, Ramaswamy Chidambaram R. A highly enantioselective asymmetric Darzens reaction catalysed by proline based efficient organocatalysts for the synthesis of di- and tri-substituted epoxides. Chem Commun (Camb) 2018; 53:10926-10929. [PMID: 28930307 DOI: 10.1039/c7cc06194c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new class of easily available and readily tunable proline based chiral organocatalysts was found to efficiently catalyse an unprecedented highly enantioselective asymmetric Darzens reaction of α-chloroketones and substituted α-chloroketones with various aldehydes, which directly produces optically active di- and tri-substituted chiral epoxides with higher product yields (up to 97%) and excellent ee's (up to 99%) under mild reaction conditions.
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Affiliation(s)
- Veeramanoharan Ashokkumar
- Supramolecular and Organometallic Chemistry Lab, Department of Inorganic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, Tamil Nadu-625 021, India.
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Gu QS, Yang D. Enantioselective Synthesis of (+)-Mitomycin K by a Palladium-Catalyzed Oxidative Tandem Cyclization. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701895] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qiang-Shuai Gu
- Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P.R. China
| | - Dan Yang
- Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P.R. China
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Gu QS, Yang D. Enantioselective Synthesis of (+)-Mitomycin K by a Palladium-Catalyzed Oxidative Tandem Cyclization. Angew Chem Int Ed Engl 2017; 56:5886-5889. [PMID: 28425184 DOI: 10.1002/anie.201701895] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Indexed: 11/08/2022]
Abstract
The mitomycins, a family of bioactive natural products, feature a compact 6/5/5-fused polycyclic ring structure densely decorated with highly reactive and/or fragile quinone, amino ketal, and aziridine as well as carbamate moieties. It is this striking feature that has defeated numerous synthetic attempts towards these apparently small molecules, rendering them one of the most formidable targets for total synthesis. We herein report the first enantioselective synthesis of (+)-mitomycin K, a representative of G series mitomycins. The key step of this synthesis is an enantioselective oxidative cyclization catalyzed by a palladium/(+)-sparteine system that had previously been developed by our group. The robustness of this method bodes well for further applications in the asymmetric total synthesis of natural products, particularly those with characteristic 6/5/5-fused pyrroloindole skeletons.
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Affiliation(s)
- Qiang-Shuai Gu
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
| | - Dan Yang
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
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Guan Y, López‐Alberca MP, Lu Z, Zhang Y, Desai AA, Patwardhan AP, Dai Y, Vetticatt MJ, Wulff WD. Catalytic Asymmetric Synthesis of Alkynyl Aziridines: Both Enantiomers of
cis
‐Aziridines from One Enantiomer of the Catalyst. Chemistry 2014; 20:13894-900. [DOI: 10.1002/chem.201404587] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Indexed: 11/12/2022]
Affiliation(s)
- Yong Guan
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA), Fax: (001) 517‐3353‐1793 http://www2.chemistry.msu.edu/faculty/wulff/myweb26/index.htm
| | - Maria P. López‐Alberca
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA), Fax: (001) 517‐3353‐1793 http://www2.chemistry.msu.edu/faculty/wulff/myweb26/index.htm
| | - Zhenjie Lu
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA), Fax: (001) 517‐3353‐1793 http://www2.chemistry.msu.edu/faculty/wulff/myweb26/index.htm
| | - Yu Zhang
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA), Fax: (001) 517‐3353‐1793 http://www2.chemistry.msu.edu/faculty/wulff/myweb26/index.htm
| | - Aman A. Desai
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA), Fax: (001) 517‐3353‐1793 http://www2.chemistry.msu.edu/faculty/wulff/myweb26/index.htm
| | - Aniruddha P. Patwardhan
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA), Fax: (001) 517‐3353‐1793 http://www2.chemistry.msu.edu/faculty/wulff/myweb26/index.htm
| | - Yijing Dai
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA), Fax: (001) 517‐3353‐1793 http://www2.chemistry.msu.edu/faculty/wulff/myweb26/index.htm
| | | | - William D. Wulff
- Department of Chemistry, Michigan State University, East Lansing, MI 48824 (USA), Fax: (001) 517‐3353‐1793 http://www2.chemistry.msu.edu/faculty/wulff/myweb26/index.htm
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Kim DS, Park JW, Jun CH. Synthesis of Isoquinoline Derivatives through Rhodium(III)- Catalyzed Reactions of Benzylamines with Non-Terminal Alkynes. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300377] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Brucelle F, Renaud P. Synthesis of a Leucomitosane via a Diastereoselective Radical Cascade. J Org Chem 2013; 78:6245-52. [DOI: 10.1021/jo4009904] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- François Brucelle
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Philippe Renaud
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
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