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Jyoti Roy V, Pathania V, Raha Roy S. Making and Breaking of C-N Bonds: Applications in the Synthesis of Unsymmetric Tertiary Amines and α-Amino Carbonyl Derivatives. Chem Asian J 2023; 18:e202200998. [PMID: 36373843 DOI: 10.1002/asia.202200998] [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: 09/30/2022] [Revised: 10/31/2022] [Indexed: 11/16/2022]
Abstract
An operationally simple process has been developed for the synthesis of unsymmetrical amines and α-amino carbonyl derivatives in the absence of a catalyst, ligand, oxidant, or any additives. Contrary to known reductive amination methods, this protocol is amenable to substrates containing other reducible groups. This process effectively results in consecutive cleavage and formation of C-N bonds. DFT studies and Hammett analysis provide useful insight into the mechanism. The role of noncovalent interactions as a stabilizing factor have been examined in the protocol. A wide range of alkyl-bromides have been coupled efficiently with a variety of dimethyl anilines to get unsymmetric tertiary amines with yields up to 90%. This methodology was further extended to the synthesis of α-amino carbonyl derivatives with yields up to 93%.
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Affiliation(s)
- Vishal Jyoti Roy
- Department of Chemistry, Indian Institute of Technology Delhi, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Vishali Pathania
- Department of Chemistry, Indian Institute of Technology Delhi, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Sudipta Raha Roy
- Department of Chemistry, Indian Institute of Technology Delhi, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
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Liu C, Tan X, Zhan L, Jing Y, Wu W, Ke Z, Jiang H. Palladium-Catalyzed Cascade Cyclization for the Synthesis of Fused Benzo-Aza-Oxa-[5-6-5] Tetracycles. Angew Chem Int Ed Engl 2022; 61:e202215020. [PMID: 36283979 DOI: 10.1002/anie.202215020] [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: 10/12/2022] [Indexed: 11/07/2022]
Abstract
A novel and expedient cascade strategy has been demonstrated for the synthesis of fused benzo-aza-oxa-[5-6-5] tetracycles in high yields and diastereoselectivities (up to 20 : 1 dr). The strategy was fulfilled through palladium-catalyzed oxidative convergent assembly of functionally divergent anilines and 3-butenoic acid with five chemical bonds constructed. Coupled with control experiments and deuterium labelled studies, DFT calculations were performed for the proposed mechanism. The utility of the illustrated strategy is emphasized by gram-scale syntheses, late-stage functionalization, and the transformation to a key core of natural products such as martinellic acid and seneciobipyrrolidine.
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Affiliation(s)
- Chao Liu
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Xiangwen Tan
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Lingzhi Zhan
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Yaru Jing
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou, 510275, China
| | - Wanqing Wu
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Zhuofeng Ke
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou, 510275, China
| | - Huanfeng Jiang
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
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Lai YL, Yan SX, Zhang SL, Huang YH, Hu RX, Chen YC, Luo JM, Li J. Palladium-Catalyzed Cascade Cyclization/Alkylation of Oxime Ethers: Assembly of 4-Alkylisoxazoles by "Chain-Walking" Strategy. Chem Asian J 2022; 17:e202200806. [PMID: 36000512 DOI: 10.1002/asia.202200806] [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: 08/02/2022] [Revised: 08/23/2022] [Indexed: 11/08/2022]
Abstract
A reliable and efficient palladium-catalyzed cascade cyclization/alkylation of oxime ethers with unactivated alkenes is described, affording a whole variety of structurally diverse isoxazole derivatives in moderate to good yields with excellent functional group compatibility. Ionic liquid [Aeim]Br not only acts as an environmentally friendly solvent but also acts as an accelerating agent to provide excess bromine source to eliminate bromomethane from oxime ethers. More importantly, the use of "chain-walking" strategy provides a novel methodology in organic synthesis to rapid generation of molecular complexity from readily available starting materials.
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Affiliation(s)
- Yin-Long Lai
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Shao-Xi Yan
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Sheng-Ling Zhang
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Yu-Hong Huang
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Ru-Xin Hu
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Yang-Chong Chen
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Jian-Min Luo
- Shaoguan University, School of Chemistry and Chemical Engineering, CHINA
| | - Jianxiao Li
- South China University of Technology, School of Chemistry and Chemical Engineering, wushan road, 510640, Guangzhou, CHINA
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Abstract
A catalytic enantioselective β-O-elimination reaction is reported in the form of a zirconium-catalyzed asymmetric opening of meso-ketene acetals. Furthermore, a regiodivergent β-O-elimination is demonstrated. The reaction proceeds under mild conditions, at low catalyst loadings, and produces chiral monoprotected cis-1,2-diols in good yield and enantiomeric excess. The combination with a Mitsunobu reaction or a one-pot hydroboration/Suzuki reaction sequence then gives access to additional diol and aminoalcohol building blocks. A stereochemical analysis supported by DFT calculations reveals that a high selectivity in the hydrozirconation step is also important for achieving high enantioselectivity, although it does not constitute the asymmetric step. This insight is crucial for the future development of related asymmetric β-elimination reactions.
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Affiliation(s)
- Christof Matt
- Department of Chemistry—BMCUppsala UniversityHusargatan 375237UppsalaSweden
- Institut für Organische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstr. 2179104Freiburg im BreisgauGermany
| | - Andreas Orthaber
- Department of Chemistry—Ångström LaboratoryUppsala UniversityLägerhyddsvägen 175237UppsalaSweden
| | - Jan Streuff
- Department of Chemistry—BMCUppsala UniversityHusargatan 375237UppsalaSweden
- Institut für Organische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstr. 2179104Freiburg im BreisgauGermany
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5
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Matt C, Orthaber A, Streuff J. Catalytic Asymmetric β‐Oxygen Elimination**. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Christof Matt
- Department of Chemistry—BMC Uppsala University Husargatan 3 75237 Uppsala Sweden
- Institut für Organische Chemie Albert-Ludwigs-Universität Freiburg Albertstr. 21 79104 Freiburg im Breisgau Germany
| | - Andreas Orthaber
- Department of Chemistry—Ångström Laboratory Uppsala University Lägerhyddsvägen 1 75237 Uppsala Sweden
| | - Jan Streuff
- Department of Chemistry—BMC Uppsala University Husargatan 3 75237 Uppsala Sweden
- Institut für Organische Chemie Albert-Ludwigs-Universität Freiburg Albertstr. 21 79104 Freiburg im Breisgau Germany
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Zhou F, Li M, Jiang H, Wu W. Recent Advances in Transformations Involving Electron‐Rich Alkenes: Functionalization, Cyclization, and Cross‐Metathesis Reactions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100585] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Fei Zhou
- State Key Laboratory of Luminescent Materials and Devices School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Meng Li
- State Key Laboratory of Luminescent Materials and Devices School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Huanfeng Jiang
- State Key Laboratory of Luminescent Materials and Devices School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
- State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Wanqing Wu
- State Key Laboratory of Luminescent Materials and Devices School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
- State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 People's Republic of China
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Hu M, Wu W, Jiang H. Palladium-Catalyzed Oxidation Reactions of Alkenes with Green Oxidants. CHEMSUSCHEM 2019; 12:2911-2935. [PMID: 30989816 DOI: 10.1002/cssc.201900397] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 04/09/2019] [Indexed: 06/09/2023]
Abstract
Transition-metal-catalyzed oxidative functionalization of alkenes has emerged as a powerful and valuable tool in modern organic synthesis. Recently, many methods have been established for the assembly of C-C and C-heteroatom bonds, which provides tremendous possibility for application in biology, medicine, and materials science. However, the use of stoichiometric amounts of strong oxidants leads to poor selectivity, low atom economy, and a series of undesired waste products. By contrast, green oxidants, such as O2 , H2 O2 , or tert-butyl hydroperoxide (TBHP), have bright prospects due to their attributes of mild, low cost, and great sustainability in transition-metal-catalyzed oxidation reactions. Based on the great and unique potential for the development of aerobic reactions, this review mainly highlights homogenous palladium-catalyzed green oxidations of alkenes that have been reported in recent years. These methods provide new strategies for the transformation and functionalization of alkenes; some of them have also been successfully applied to the synthesis of the core structures of drugs and natural products. Additionally, through in-depth studies of the reaction mechanisms in this field, it is believed that palladium-catalyzed green oxidation reactions of alkenes with O2 , H2 O2 , or TBHP will create added value for organic synthetic chemistry.
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Affiliation(s)
- Miao Hu
- Key Laboratory of Functional Molecular Engineering of, Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, PR China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of, Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, PR China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of, Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, PR China
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Li J, Huang R, Li C, Lin S, Wu W, Jiang H. Assembly of Functionalized 4‐Alkynylisoxazoles by Palladium‐Catalyzed Three‐Component Cascade Cyclization/Alkynylation. Chem Asian J 2019; 14:2309-2315. [DOI: 10.1002/asia.201900476] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Revised: 05/03/2019] [Indexed: 01/07/2023]
Affiliation(s)
- Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510640 P. R. China
| | - Ruikang Huang
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510640 P. R. China
| | - Can Li
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510640 P. R. China
| | - Shao Lin
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510640 P. R. China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510640 P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510640 P. R. China
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Zhou M, Zhu S, Zhou Q. Iodine‐Catalyzed Oxidative Rearrangement of Amines to α‐Amino Acetals and α‐Amino Aldehydes. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801670] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Min‐Jie Zhou
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of ChemistryNankai University Tianjin 300071 People's Republic of China
| | - Shou‐Fei Zhu
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of ChemistryNankai University Tianjin 300071 People's Republic of China
| | - Qi‐Lin Zhou
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of ChemistryNankai University Tianjin 300071 People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)Nankai University Tianjin 300071 People's Republic of China
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