1
|
Gutman KL, Quintanilla CD, Zhang L. Catalytic Enantioselective Protonation of Gold Enolates Enabled by Cooperative Gold(I) Catalysis. J Am Chem Soc 2024; 146:3598-3602. [PMID: 38295275 DOI: 10.1021/jacs.3c11919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
Enantioselective protonation is a versatile approach to the construction of tertiary α-stereocenters, which are common structural motifs in various natural products and biologically relevant compounds. Herein we report a mild access to these chiral centers using cooperative gold(I) catalysis. From cyclic ketone enol carbonates, this asymmetric catalysis provides highly enantioselective access to cyclic ketones featuring an α tertiary chiral center, including challenging 2-methylsuberone. In combination with the gold-catalyzed formation of cyclopentadienyl carbonates in a one-pot, two-step process, this chemistry enables expedient access to synthetically versatile α'-chiral cyclopentenones with excellent enantiomeric excesses from easily accessible enynyl carbonate substrates.
Collapse
Affiliation(s)
- Kaylaa L Gutman
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Carlos D Quintanilla
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Liming Zhang
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| |
Collapse
|
2
|
Mizutani H, Kawanishi R, Shibatomi K. Enantioselective decarboxylative protonation and deuteration of β-ketocarboxylic acids. Chem Commun (Camb) 2021; 57:6676-6679. [PMID: 34132257 DOI: 10.1039/d1cc01610e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Enantioselective decarboxylative protonation of tetralone-derived β-ketocarboxylic acids was achieved with up to 89% enantiomeric excess (ee)-in the presence of a chiral primary amine catalyst. Furthermore, this method was applied to enantioselective deuteration to afford the corresponding α-deuterioketones with up to 88% ee.
Collapse
Affiliation(s)
- Haruna Mizutani
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan.
| | - Ryouta Kawanishi
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan.
| | - Kazutaka Shibatomi
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan.
| |
Collapse
|
3
|
Łowicki D, Watral J, Jelecki M, Bohusz W, Kwit M. Stereoselective protonation of 2-methyl-1-tetralone lithium enolate catalyzed by salan-type diamines. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
4
|
Hou M, Lin L, Chai X, Zhao X, Qiao B, Jiang Z. Enantioselective photoredox dehalogenative protonation. Chem Sci 2019; 10:6629-6634. [PMID: 31367315 PMCID: PMC6625487 DOI: 10.1039/c9sc02000d] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 05/29/2019] [Indexed: 12/13/2022] Open
Abstract
We report an enantioselective photoredox dehalogenative protonation as a new type of asymmetric protonation. As a paradigm, with a cooperative catalytic system consisting of a chiral H-bonding catalyst and a dicyanopyrazine-derived chromophore (DPZ) photosensitizer that is irradiated with visible light, a range of cyclic and acyclic ketones with labile chiral secondary C-F, C-Cl and C-Br bonds at the α-position were obtained in high yields with good to excellent enantioselectivities (up to >99% ee) by using a secondary amine as the terminal reductant. Given the ready accessibility of halides, the success of this work should provide inspiration for constructing diverse chiral α-tertiary carbonyls and their variants.
Collapse
Affiliation(s)
- Meimei Hou
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Lu Lin
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Xiangpei Chai
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Xiaowei Zhao
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Baokun Qiao
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Zhiyong Jiang
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation , Key Laboratory of Green Chemical Media and Reactions , Ministry of Education , Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals , School of Chemistry and Chemical Engineering , Henan Normal University , Xinxiang , Henan 453007 , China
| |
Collapse
|
5
|
Abstract
Enantioselective protonation, delivery of a proton to a carbanion intermediate, is the most straightforward and fundamental method for the preparation of a chiral tertiary carbon stereocenter. Recent efforts for this objective have been realized through enamine catalysis, which has now become a prominent catalytic strategy enabling a range of fascinating chiral transformations. This review will summarize recent advances in the field of enantioselective enamine protonation for the synthesis of optically active carbonyl compounds. Dynamic kinetic resolutions of α-substituted carbonyl compounds through enamine intermediates will be discussed as well.
Collapse
Affiliation(s)
- Niankai Fu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
| | | | | |
Collapse
|
6
|
Paladhi S, Liu Y, Kumar BS, Jung MJ, Park SY, Yan H, Song CE. Fluoride Anions in Self-Assembled Chiral Cage for the Enantioselective Protonation of Silyl Enol Ethers. Org Lett 2017; 19:3279-3282. [DOI: 10.1021/acs.orglett.7b01429] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sushovan Paladhi
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Yidong Liu
- Innovative
Drug Research Centre, Chongqing University, Chongqing 401331, China
| | - B. Senthil Kumar
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Min-Jung Jung
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Sang Yeon Park
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Hailong Yan
- Innovative
Drug Research Centre, Chongqing University, Chongqing 401331, China
| | - Choong Eui Song
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| |
Collapse
|
7
|
Pollice R, Schnürch M. Expansion of the Concept of Nonlinear Effects in Catalytic Reactions Beyond Asymmetric Catalysis. Chemistry 2016; 22:5637-42. [DOI: 10.1002/chem.201504970] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Indexed: 01/01/2023]
Affiliation(s)
- Robert Pollice
- Institute of Applied Synthetic Chemistry; TU Wien; Getreidemarkt 9/163-OC Vienna 1060 Austria
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry; TU Wien; Getreidemarkt 9/163-OC Vienna 1060 Austria
| |
Collapse
|
8
|
Borah A, Goswami L, Neog K, Gogoi P. DMF Dimethyl Acetal as Carbon Source for α-Methylation of Ketones: A Hydrogenation–Hydrogenolysis Strategy of Enaminones. J Org Chem 2015; 80:4722-8. [DOI: 10.1021/acs.joc.5b00084] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Ashwini Borah
- Medicinal Chemistry Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
| | - Limi Goswami
- Medicinal Chemistry Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
| | - Kashmiri Neog
- Medicinal Chemistry Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
| | - Pranjal Gogoi
- Medicinal Chemistry Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
| |
Collapse
|
9
|
Heredia AA, Soria-Castro SM, Bouchet LM, Oksdath-Mansilla G, Barrionuevo CA, Caminos DA, Bisogno FR, Argüello JE, Peñéñory AB. Stereoselective one-pot synthesis of β-alkylsulfide enol esters. Base-triggered rearrangement under mild conditions. Org Biomol Chem 2014; 12:6516-26. [PMID: 25029604 DOI: 10.1039/c4ob01011f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A stereoselective one-pot procedure was developed to prepare S-substituted (Z)-enol esters through a base-triggered rearrangement. This transition metal-free multicomponent approach can be performed under an air atmosphere at room temperature, tolerates a wide set of chemical functionalities and generally affords high isolated yields. The (Z)-selectivity arises from the [1,4]-S- to O-acyl migration.
Collapse
Affiliation(s)
- Adrián A Heredia
- INFIQC-CONICET, Dpto. de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina.
| | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Neubauer TM, van Leeuwen T, Zhao D, Lubbe AS, Kistemaker JCM, Feringa BL. Asymmetric synthesis of first generation molecular motors. Org Lett 2014; 16:4220-3. [PMID: 25079823 PMCID: PMC5055213 DOI: 10.1021/ol501925f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
A general
enantioselective route to functionalized first generation
molecular motors is described. An enantioselective protonation of
the silyl enol ethers of indanones by a Au(I)BINAP complex sets the
stage for a highly diastereoselective McMurry coupling as a second
enhancement step for enantiomeric excess. In this way various functionalized
overcrowded alkenes could be synthesized in good yields (up to 78%)
and good to excellent enantiomeric excess (85% ee–>98% ee)
values.
Collapse
Affiliation(s)
- Thomas M Neubauer
- Centre for System Chemistry, Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen , Nijenborgh 4, 9747AG Groningen, The Netherlands
| | | | | | | | | | | |
Collapse
|
11
|
|