1
|
Modern Approaches to Synthetic Design of Chiral α-Tertiary Amines Based on Trifluoromethylcontaining Ketimines: A Review. THEOR EXP CHEM+ 2022. [DOI: 10.1007/s11237-022-09710-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
2
|
Yasukawa N, Yamanoue A, Takehara T, Suzuki T, Nakamura S. Asymmetric synthesis of tetrasubstituted cyclic amines via aza-Henry reaction using cinchona alkaloid sulfonamide/zinc(II) catalysts. Chem Commun (Camb) 2021; 58:1318-1321. [PMID: 34950940 DOI: 10.1039/d1cc06492d] [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
The first enantioselective aza-Henry reaction of non-activated cyclic iminoesters, derived from cyclic amino acids, has been developed. Good yields and enantioselectivities were observed for the reaction using our original cinchona alkaloid sulfonamide/zinc(II) catalyst. The transition state was proposed to explain the stereoselectivity based on experiments and DFT calculations.
Collapse
Affiliation(s)
- Naoki Yasukawa
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan.
| | - Ami Yamanoue
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan.
| | - Tsunayoshi Takehara
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
| | - Takeyuki Suzuki
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
| | - Shuichi Nakamura
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan. .,Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan
| |
Collapse
|
3
|
Onyeagusi CI, Malcolmson SJ. Strategies for the Catalytic Enantioselective Synthesis of α-Trifluoromethyl Amines. ACS Catal 2020; 10:12507-12536. [PMID: 34306806 PMCID: PMC8302206 DOI: 10.1021/acscatal.0c03569] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The exploitation of the α-trifluoromethylamino group as an amide surrogate in peptidomimetics and drug candidates has been on the rise. In a large number of these cases, this moiety bears stereochemistry with the stereochemical identity having important consequences on numerous molecular properties, such as the potency of the compound. Yet, the majority of stereoselective syntheses of α-CF3 amines rely on diastereoselective couplings with chiral reagents. Concurrent with the rapid expansion of fluorine into pharmaceuticals has been the development of catalytic enantioselective means of preparing α-trifluoromethyl amines. In this work, we outline the strategies that have been employed for accessing these enantioenriched amines, including normal polarity approaches and several recent developments in imine umpolung transformations.
Collapse
Affiliation(s)
- Chibueze I Onyeagusi
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Steven J Malcolmson
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| |
Collapse
|
4
|
Gagarin AA, Suntsova PO, Minin AS, Pozdina VA, Slepukhin PA, Benassi E, Belskaya NP. Two Approaches for the Synthesis of Fused Dihydropyridines via a 1,6-Electrocyclic Reaction: Fluorescent Properties and Prospects for Application. J Org Chem 2020; 85:13837-13852. [PMID: 33107738 DOI: 10.1021/acs.joc.0c01934] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reactions of penta-2,4-dienethioamides with acetylenedicarboxylic acid, methyl and ethyl esters, and methyl propiolate were systematically studied, and a number of new 2,3-dihydro-5H-thiazolo[3,2-a]pyridines (DTPs) and 4H,6H-pyrido[2,1-b][1,3]thiazines (PTZs) were prepared. A possible mechanism for a multistep domino transformation is suggested, and the key step is the 1,6-electrocyclic reaction. An additional alternative method for the synthesis of new heterocyclic systems was achieved. Evidence of the electrocyclic mechanism of a key step was collected from the analysis of the spatial structure of the synthesized bicyclic nonaromatic pyridines by X-ray diffraction and quantum chemical calculations, as well as from the thermodynamic quantities. DTPs exhibited yellow fluorescence in solution and yellow to red emissions in the solid state. Biological investigations demonstrated the ability of DTPs to penetrate living and fixed cells and presumably accumulate in lysosomes.
Collapse
Affiliation(s)
- Aleksey A Gagarin
- Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russian Federation
| | - Polina O Suntsova
- Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russian Federation
| | - Artem S Minin
- Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russian Federation.,M. N. Mikheev Institute of Metal Physics, Ural Branch of Russian Academy of Science, 18 South Kovalevskaya Street, Yekaterinburg 620219, Russian Federation
| | - Varvara A Pozdina
- Institute of Immunology and Physiology, Pervomayskaya Str. 106, Ekaterinburg 620049, Russian Federation
| | - Pavel A Slepukhin
- Postovsky Institute of Organic Synthesis, Ural Branch of Russian Academy of Science, 22 South Kovalevskaya Street, Yekaterinburg 620219, Russian Federation
| | - Enrico Benassi
- Shihezi University, 280 North Fourth Road, Shihezi, Xinjiang 832000, China
| | - Nataliya P Belskaya
- Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russian Federation.,Postovsky Institute of Organic Synthesis, Ural Branch of Russian Academy of Science, 22 South Kovalevskaya Street, Yekaterinburg 620219, Russian Federation
| |
Collapse
|