1
|
Enantioselective cyclopropanation of conjugated cyanosulfones using carbohydrate-based crown ether catalysts. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.130965] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
2
|
Michiyuki T, Komeyama K. Recent Advances in Four‐Coordinated Planar Cobalt Catalysis in Organic Synthesis. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900625] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Takuya Michiyuki
- Department of Applied ChemistryGraduate School of EngineeringHiroshima University 1-4-1 Kagamiyama, Higashi-Hiroshima Hiroshima 739-8527 Japan
| | - Kimihiro Komeyama
- Department of Applied ChemistryGraduate School of EngineeringHiroshima University 1-4-1 Kagamiyama, Higashi-Hiroshima Hiroshima 739-8527 Japan
| |
Collapse
|
3
|
Affiliation(s)
- Guojiao Wu
- Department of ChemistryUniversity of Hamburg Martin Luther King Pl 6 20146 Hamburg Germany
| | - Jennifer Börger
- Department of ChemistryUniversity of Hamburg Martin Luther King Pl 6 20146 Hamburg Germany
| | | |
Collapse
|
4
|
Wu G, Börger J, Jacobi von Wangelin A. A Carbene-Extended ATRA Reaction. Angew Chem Int Ed Engl 2019; 58:17241-17245. [PMID: 31613415 PMCID: PMC6900008 DOI: 10.1002/anie.201909872] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 09/03/2019] [Indexed: 12/27/2022]
Abstract
Atom-transfer radical addition (ATRA) reactions have gained a strong foothold in organic synthesis by virtue of their operational simplicity, synthetic versatility, and perfect atom economy. A rich chemical space can be accessed through clever combinations of the simple starting materials. Many variations of this general motif have been reported. However, the vast majority involve the addition of an organic halide across a C=C double bond, resulting in the formation of 1,2-bifunctional products. This report introduces a significant expansion of this general reactivity concept to give 1,3-bifunctional adducts through the combination of 1,1-ATRA to a carbenoid and 1,2-ATRA to an alkyne. Both processes operate under mild conditions (RT, 5 h) with the same commercial catalyst (CoBr2 , dppbz).
Collapse
Affiliation(s)
- Guojiao Wu
- Department of ChemistryUniversity of HamburgMartin Luther King Pl 620146HamburgGermany
| | - Jennifer Börger
- Department of ChemistryUniversity of HamburgMartin Luther King Pl 620146HamburgGermany
| | | |
Collapse
|
5
|
Li C, Lang K, Lu H, Hu Y, Cui X, Wojtas L, Zhang XP. Catalytic Radical Process for Enantioselective Amination of C(sp 3 )-H Bonds. Angew Chem Int Ed Engl 2018; 57:16837-16841. [PMID: 30347505 PMCID: PMC6339699 DOI: 10.1002/anie.201808923] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Indexed: 12/20/2022]
Abstract
A new catalytic radical system involving CoII -based metalloradical catalysis is effective in activating sulfamoyl azides for enantioselective radical 1,6-amination of C(sp3 )-H bonds, affording six-membered chiral heterocyclic sulfamides in high yields with excellent enantioselectivities. The CoII -catalyzed C-H amination features an unusual degree of functional-group tolerance and chemoselectivity. The unique reactivity and stereoselectivity is attributed to the underlying stepwise radical pathway. The resulting optically active cyclic sulfamides can be readily converted into synthetically useful chiral 1,3-diamine derivatives without loss in enantiopurity.
Collapse
Affiliation(s)
- Chaoqun Li
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Kai Lang
- Department of Chemistry, Merkert Chemistry Center Boston College, Chestnut Hill, MA 02467 (USA)
| | - Hongjian Lu
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Yang Hu
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Xin Cui
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Lukasz Wojtas
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - X. Peter Zhang
- Department of Chemistry, Merkert Chemistry Center Boston College, Chestnut Hill, MA 02467 (USA)
| |
Collapse
|
6
|
Li C, Lang K, Lu H, Hu Y, Cui X, Wojtas L, Zhang XP. Catalytic Radical Process for Enantioselective Amination of C(sp
3
)−H Bonds. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808923] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chaoqun Li
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Kai Lang
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Hongjian Lu
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Yang Hu
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Xin Cui
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Lukasz Wojtas
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - X. Peter Zhang
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| |
Collapse
|
7
|
Tsuruda K, Tokumoto T, Inoue N, Nakajima M, Nemoto T. Synthesis of 7-Membered Ring Carbocycles via a Palladium-Catalyzed Intramolecular Allylic Alkylation-Isomerization-Cope Rearrangement Cascade. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800230] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Kazuki Tsuruda
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1, Inohana, Chuo-ku 260-8675 Chiba Japan
| | - Takahisa Tokumoto
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1, Inohana, Chuo-ku 260-8675 Chiba Japan
| | - Naoya Inoue
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1, Inohana, Chuo-ku 260-8675 Chiba Japan
| | - Masaya Nakajima
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1, Inohana, Chuo-ku 260-8675 Chiba Japan
| | - Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1, Inohana, Chuo-ku 260-8675 Chiba Japan
- Molecular Chirality Research Center; Chiba University; 1-33, Yayoi-cho, Inage-ku 263-8522 Chiba Japan
| |
Collapse
|
8
|
Karns AS, Goswami M, de Bruin B. Catalytic Synthesis of Indolines by Hydrogen Atom Transfer to Cobalt(III)-Carbene Radicals. Chemistry 2018; 24:5253-5258. [PMID: 29143995 PMCID: PMC5915749 DOI: 10.1002/chem.201704626] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Indexed: 11/28/2022]
Abstract
We report a new method for the synthesis of indolines from o-aminobenzylidine N-tosylhydrazones proceeding through a cobalt(III)-carbene radical intermediate. This methodology employs the use of inexpensive commercially available reagents and allows for the transformation of easily derivatized benzaldehyde-derived precursors to functionalized indoline products. This transformation takes advantage of the known propensity of radicals to undergo rapid intramolecular 1,5-hydrogen atom transfer (1,5-HAT) to form more stabilized radical intermediates. Computational investigations using density functional theory identify remarkably low barriers for 1,5-HAT and subsequent radical rebound displacement, providing support for the proposed mechanism. We explore the effect of a variety of nitrogen substituents, and highlight the importance of adequate resonance stabilization of radical intermediates to the success of the transformation. Furthermore, we evaluate the steric and electronic effects of substituents on the aniline ring. This transformation is the first reported example of the synthesis of nitrogen-containing heterocycles from cobalt(III)-carbene radical precursors.
Collapse
Affiliation(s)
- Alexander S. Karns
- Department of ChemistryUniversity of California, Irvine1102 Natural Sciences IIIrvineCA92697-2025USA
| | - Monalisa Goswami
- Van't Hoff Institute for Molecular Sciences (HIMS)Homogeneous and Supramolecular Catalysis groupUniversity of AmsterdamScience Park 9041098XHAmsterdamThe Netherlands
| | - Bas de Bruin
- Van't Hoff Institute for Molecular Sciences (HIMS)Homogeneous and Supramolecular Catalysis groupUniversity of AmsterdamScience Park 9041098XHAmsterdamThe Netherlands
| |
Collapse
|
9
|
Richrath RB, Olyschläger T, Hildebrandt S, Enny DG, Fianu GD, Flowers RA, Gansäuer A. Cp 2 TiX Complexes for Sustainable Catalysis in Single-Electron Steps. Chemistry 2018; 24:6371-6379. [PMID: 29327511 DOI: 10.1002/chem.201705707] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Indexed: 12/18/2022]
Abstract
We present a combined electrochemical, kinetic, and synthetic study with a novel and easily accessible class of titanocene catalysts for catalysis in single-electron steps. The tailoring of the electronic properties of our Cp2 TiX-catalysts that are prepared in situ from readily available Cp2 TiX2 is achieved by varying the anionic ligand X. Of the complexes investigated, Cp2 TiOMs proved to be either equal or substantially superior to the best catalysts developed earlier. The kinetic and thermodynamic properties pertinent to catalysis have been determined. They allow a mechanistic understanding of the subtle interplay of properties required for an efficient oxidative addition and reduction. Therefore, our study highlights that efficient catalysts do not require the elaborate covalent modification of the cyclopentadienyl ligands.
Collapse
Affiliation(s)
- Ruben B Richrath
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Str. 1, 53121, Bonn, Germany
| | - Theresa Olyschläger
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Str. 1, 53121, Bonn, Germany
| | - Sven Hildebrandt
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Str. 1, 53121, Bonn, Germany
| | - Daniel G Enny
- Department of Chemistry, Lehigh University, Bethlehem, PA, 18015, USA
| | - Godfred D Fianu
- Department of Chemistry, Lehigh University, Bethlehem, PA, 18015, USA
| | - Robert A Flowers
- Department of Chemistry, Lehigh University, Bethlehem, PA, 18015, USA
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Str. 1, 53121, Bonn, Germany
| |
Collapse
|
10
|
Zhang Y, Lin L, Chen Y, Liu X, Feng X. N
,N′
-Dioxide-Lanthanum(III)-Catalyzed Asymmetric Cyclopropanation of 2-Cyano-3-arylacrylates with 2-Bromomalonates. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700212] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Yuheng Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 People's Republic of China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 People's Republic of China
| | - Yushuang Chen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 People's Republic of China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 People's Republic of China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry; Sichuan University; Chengdu 610064 People's Republic of China
| |
Collapse
|
11
|
Miyabe H. Unique Strategies for Controlling Enantioselective Stereochemistry of Cyclizations via Radical Intermediates. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Hideto Miyabe
- School of Pharmacy; Hyogo University of Health Sciences; 650-8530 Minatojima, Chuo-ku Kobe Japan
| |
Collapse
|
12
|
Designing ‘Totem’C2-Symmetrical Iron Porphyrin Catalysts for Stereoselective Cyclopropanations. Chemistry 2016; 22:13599-612. [DOI: 10.1002/chem.201602289] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Indexed: 11/07/2022]
|
13
|
Affiliation(s)
- Igor V. Trushkov
- Department of Chemistry; M. V. Lomonosov Moscow State University; Leninskie Gory 1-3 Moscow 119991 Russia
- Federal Research Center of Pediatric Hematology, Oncology and Immunology n.a. Dmitry Rogachev; Samory Mashela 1 Moscow 117997 Russia
| |
Collapse
|
14
|
Wu X, Lei C, Yue G, Zhou JS. Palladium-Catalyzed Direct Cyclopropylation of Heterocycles. Angew Chem Int Ed Engl 2015; 54:9601-5. [DOI: 10.1002/anie.201504735] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Indexed: 12/19/2022]
|
15
|
Wu X, Lei C, Yue G, Zhou JS. Palladium-Catalyzed Direct Cyclopropylation of Heterocycles. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504735] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
16
|
Zhang J, Jiang J, Xu D, Luo Q, Wang H, Chen J, Li H, Wang Y, Wan X. Interception of Cobalt-Based Carbene Radicals with α-Aminoalkyl Radicals: A Tandem Reaction for the Construction of β-Ester-γ-amino Ketones. Angew Chem Int Ed Engl 2014; 54:1231-5. [DOI: 10.1002/anie.201408874] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2014] [Indexed: 12/22/2022]
|
17
|
Zhang J, Jiang J, Xu D, Luo Q, Wang H, Chen J, Li H, Wang Y, Wan X. Interception of Cobalt-Based Carbene Radicals with α-Aminoalkyl Radicals: A Tandem Reaction for the Construction of β-Ester-γ-amino Ketones. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408874] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
18
|
Shen JJ, Zhu SF, Cai Y, Xu H, Xie XL, Zhou QL. Enantioselective iron-catalyzed intramolecular cyclopropanation reactions. Angew Chem Int Ed Engl 2014; 53:13188-91. [PMID: 25283384 DOI: 10.1002/anie.201406853] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Revised: 08/15/2014] [Indexed: 12/30/2022]
Abstract
An iron-catalyzed asymmetric intramolecular cyclopropanation was realized in high yields and excellent enantioselectivity (up to 97% ee) by using the iron complexes of chiral spiro-bisoxazoline ligands as catalysts. The superiority of iron catalysts exhibited in this reaction demonstrated the potential abilities of this sustainable metal in asymmetric carbenoid transformation reactions.
Collapse
Affiliation(s)
- Jun-Jie Shen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071 (China)
| | | | | | | | | | | |
Collapse
|
19
|
Shen JJ, Zhu SF, Cai Y, Xu H, Xie XL, Zhou QL. Enantioselective Iron-Catalyzed Intramolecular Cyclopropanation Reactions. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406853] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
20
|
Otte M, Kuijpers PF, Troeppner O, Ivanović-Burmazović I, Reek JNH, de Bruin B. Encapsulated Cobalt-Porphyrin as a Catalyst for Size-Selective Radical-type Cyclopropanation Reactions. Chemistry 2014; 20:4880-4. [DOI: 10.1002/chem.201400055] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Indexed: 01/02/2023]
|