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Pan ZZ, Li JH, Tian H, Yin L. Copper(I)-Catalyzed Asymmetric Allylation of Ketones with 2-Aza-1,4-Dienes. Angew Chem Int Ed Engl 2024; 63:e202315293. [PMID: 37955332 DOI: 10.1002/anie.202315293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/13/2023] [Accepted: 11/13/2023] [Indexed: 11/14/2023]
Abstract
Catalytic asymmetric allylation of ketones under proton-transfer conditions is a challenging issue due to the limited pronucleophiles and the electrophilic inertness of ketones. Herein, a copper(I)-catalyzed asymmetric allylation of ketones with 2-aza-1,4-dienes (N-allyl-1,1-diphenylmethanimines) is disclosed, which affords a series of functionalized homoallyl tertiary alcohols in high to excellent enantioselectivity. Interestingly, N-allyl-1,1-diphenylmethanimines work as synthetic equivalents of propanals. Upon the acidic workup, a formal asymmetric β-addition of propanals to ketones is achieved. An investigation on KIE effect indicates that the deprotonation of N-allyl-1,1-diphenylmethanimines is the rate-determining step, which generates nucleophilic allyl copper(I) species. Finally, the synthetic utility of the present method is demonstrated by the asymmetric synthesis of (R)-boivinianin A and (R)-gossonorol.
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Affiliation(s)
- Zhi-Zhou Pan
- Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Jia-Heng Li
- Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Hu Tian
- Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Liang Yin
- Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
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2
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Abstract
2-Azaallyl anions are valuable intermediates which have versatile applications in functionalization with various electrophiles. Decarboxylation of the imines formed from aromatic aldehydes and α,α-diphenylglycine provides an interesting and efficient way to generate delocalized 2-azaallyl anions, which display high reactivity toward different electrophiles with excellent regioselectivity at the diphenylketimino aryl carbon of the 2-azaallyl anions. The transformation produces various amines in good yields under very mild conditions. This Synpacts article highlights the recent advances on the decarboxylative umpolung synthesis of amines from carbonyl compounds.1 Introduction2 Decarboxylative Umpolung Reactions of Carbonyl Compounds with Different Electrophiles2.1 Reaction with π-Allyl–Pd(II) Species2.2 Reaction with Morita–Baylis–Hillman Adducts2.3 Reaction with Imines2.3.1 Intermolecular Reaction with N-Ts Imines2.3.2 Intramolecular Reaction with Chiral N-tert-Butanesulfinyl Imines2.4 Reaction with Aldehydes and Ketones3 Decarboxylative Umpolung Reaction of α,β-Unsaturated Aldehydes with Aldehydes4 Conclusion
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Affiliation(s)
- Baoguo Zhao
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials and College of Chemistry and Materials Science, Shanghai Normal University
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3
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5-Trifluoromethyl-2-formylphenylboronic Acid. Molecules 2020; 25:molecules25040799. [PMID: 32059517 PMCID: PMC7070739 DOI: 10.3390/molecules25040799] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 02/05/2020] [Accepted: 02/06/2020] [Indexed: 02/05/2023] Open
Abstract
2-Formylphenylboronic acids display many interesting features, not only from synthetic but also from an application as well as structural points of view. 5-Trifluoromethyl-2-formyl phenylboronic acid has been synthesized and characterized in terms of its structure and properties. The presence of an electron-withdrawing substituent results in a considerable rise in the acidity in comparison with its analogues. In some solutions, the title compound isomerizes with formation of the corresponding 3-hydroxybenzoxaborole. Taking into account the probable mechanism of antifungal action of benzoxaboroles, which blocks the cytoplasmic leucyl-tRNA synthetase (LeuRS) of the microorganism, docking studies with the active site of the enzymes have been carried out. It showed possible binding of the cyclic isomer into the binding pocket of Candida albicans LeuRS, similar to that of the recently approved benzoxaborole antifungal drug (AN2690, Tavaborole, Kerydin). In case of Escherichia coli LeuRS, the opened isomer displays a much higher inhibition constant in comparison with the cyclic one. The antimicrobial activity of the title compound was also investigated in vitro, showing moderate action against Candida albicans. The compound reveals higher activity against Aspergillus niger as well as bacteria such as Escherichia coli and Bacillus cereus. In case of Bacillus cereus, the determined Minimum Inhibitory Concentration (MIC) value is lower than that of AN2690 (Tavaborole). The results confirm potential of 2-formylphenylboronic acids as antibacterial agents and give a hint of their possible mechanism of action.
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Uphade MB, Reddy AA, Khandare SP, Prasad KR. Stereoselective Addition of a Lithium Anion of 1,1-Diphenyl-2-aza-pentadiene to Sulfinimines: Application to the Synthesis of (-)-Epiquinamide. Org Lett 2019; 21:9109-9113. [PMID: 31691559 DOI: 10.1021/acs.orglett.9b03507] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The addition of a lithium anion of diphenylallylimine to nonracemic sulfinimines was investigated. It was found that the reaction with sulfinimines derived from aliphatic aldehydes afforded the products with excellent diastereoselectivity (>99:1), furnishing the product vicinal diamines in very good yields. Application of the formed product vicinal diamines was demonstrated in the total synthesis of the natural product (-)-epiquinamide.
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Affiliation(s)
- Manoj B Uphade
- Department of Organic Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Arava Amaranadha Reddy
- Department of Organic Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Sopan P Khandare
- Department of Organic Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Kavirayani R Prasad
- Department of Organic Chemistry , Indian Institute of Science , Bangalore 560012 , India
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Chen J, Tian J, Liu F, Liu Y, Zhao G, Yuan W, Zhao B. Intramolecular Umpolung Synthesis of Exocyclic β-Amino Alcohols through Decarboxylative Amination. ACS OMEGA 2018; 3:14671-14679. [PMID: 31458145 PMCID: PMC6644024 DOI: 10.1021/acsomega.8b02324] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Accepted: 10/22/2018] [Indexed: 06/10/2023]
Abstract
An intramolecular aminative Umpolung cyclization strategy has been developed by using α,α-diphenylglycine (2) as the amination and Umpolung reagent. Aldehydes (1) bearing an additional carbonyl group underwent condensation with α,α-diphenylglycine to form an imine, decarboxylation to generate a delocalized 2-azaallylanion, and subsequent intramolecular Umpolung cyclization to produce a variety of exocyclic β-amino alcohols (6) in 60-93% yields with up to >20:1 trans/cis selectivity under mild conditions.
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Affiliation(s)
- Jianfeng Chen
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, 16 South Yihuan Road, Chengdu 610041, China
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
- University
of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
| | - Jiaxin Tian
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Feng Liu
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Yong Liu
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Guoqing Zhao
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Weicheng Yuan
- National
Engineering Research Center of Chiral Drugs, Chengdu Institute of
Organic Chemistry, Chinese Academy of Sciences, 16 South Yihuan Road, Chengdu 610041, China
| | - Baoguo Zhao
- The
Education Ministry Key Lab of Resource Chemistry and Shanghai Key
Laboratory of Rare Earth Functional Materials, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
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6
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Liu F, Zhao G, Cai W, Xu D, Zhao B. Aminative Umpolung cyclization for synthesis of chiral exocyclic vicinal diamines. Org Biomol Chem 2018; 16:7498-7502. [PMID: 30276411 DOI: 10.1039/c8ob02000k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Chiral exocylic vicinal diamines are biologically and chemically important compounds, but they are not easy to make. In this paper, an interesting aminative Umpolung cyclization process has been developed. Aromatic aldehydes 6 bearing an electrophilic chiral sulfinimine group underwent imine formation with 2,2-diphenylglycine (2), decarboxylation, and subsequent Umpolung cyclization, producing various trans-diamines 10 in 84-96% yields with high trans/cis ratios under very mild conditions. This work not only provides an efficient, clean, and mild method for the synthesis of chiral exocyclic vicinal diamines in one step but also represents a new application of aminative Umpolung strategy on intramolecular reactions.
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Affiliation(s)
- Feng Liu
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, P. R. China.
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7
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Tang S, Zhang X, Sun J, Niu D, Chruma JJ. 2-Azaallyl Anions, 2-Azaallyl Cations, 2-Azaallyl Radicals, and Azomethine Ylides. Chem Rev 2018; 118:10393-10457. [PMID: 30302999 DOI: 10.1021/acs.chemrev.8b00349] [Citation(s) in RCA: 164] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This review covers the use of 2-azaallyl anions, 2-azaallyl cations, and 2-azaallyl radicals in organic synthesis up through June 2018. Particular attention is paid to both foundational studies and recent advances over the past decade involving semistabilized and nonstabilized 2-azaallyl anions as key intermediates in various carbon-carbon and carbon-heteroatom bond-forming processes. Both transition-metal-catalyzed and transition-metal-free transformations are covered. Azomethine ylides, which have received significant attention elsewhere, are discussed briefly with the primary focus on critical comparisons with 2-azaallyl anions in regard to generation and use.
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Affiliation(s)
- Shaojian Tang
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry, Sino-British Materials Research Institute, College of Physical Sciences & Technology, and State Key Laboratory of Biotherapy, West China Hospital , Sichuan University , Chengdu , Sichuan 610064 , People's Republic of China
| | - Xia Zhang
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry, Sino-British Materials Research Institute, College of Physical Sciences & Technology, and State Key Laboratory of Biotherapy, West China Hospital , Sichuan University , Chengdu , Sichuan 610064 , People's Republic of China
| | - Jiayue Sun
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry, Sino-British Materials Research Institute, College of Physical Sciences & Technology, and State Key Laboratory of Biotherapy, West China Hospital , Sichuan University , Chengdu , Sichuan 610064 , People's Republic of China
| | - Dawen Niu
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry, Sino-British Materials Research Institute, College of Physical Sciences & Technology, and State Key Laboratory of Biotherapy, West China Hospital , Sichuan University , Chengdu , Sichuan 610064 , People's Republic of China
| | - Jason J Chruma
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry, Sino-British Materials Research Institute, College of Physical Sciences & Technology, and State Key Laboratory of Biotherapy, West China Hospital , Sichuan University , Chengdu , Sichuan 610064 , People's Republic of China
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