1
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Zhang H, Xu N, Su B, Zhang J, Zhang C, Zhang Z, Guo B, Xu S, Wang S, Tang R. Synthesis of Amides via the Amination of Aldehydes with Hydroxylamines Promoted by TBAF·3H 2O. J Org Chem 2024. [PMID: 38781579 DOI: 10.1021/acs.joc.4c00246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
A metal-free, mild, and efficient method for the synthesis of amides has been developed from the amination of aldehydes with hydroxylamines promoted by TBAF·3H2O in the presence of KOH. Control experiments showed that the nitrone was the intermediate of this amination. By this method, a series of amides, biologically active compounds bebenil and a COX inhibitor were obtained in moderate to good yields.
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Affiliation(s)
- Huaiyuan Zhang
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, No. 1 Shandan Street, Lanzhou 730060, P. R. China
| | - Nuo Xu
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, No. 1 Shandan Street, Lanzhou 730060, P. R. China
| | - Botao Su
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, No. 1 Shandan Street, Lanzhou 730060, P. R. China
| | - Jingren Zhang
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, No. 1 Shandan Street, Lanzhou 730060, P. R. China
| | - Chongen Zhang
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, No. 1 Shandan Street, Lanzhou 730060, P. R. China
| | - Zhiyuan Zhang
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, No. 1 Shandan Street, Lanzhou 730060, P. R. China
| | - Binbin Guo
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, No. 1 Shandan Street, Lanzhou 730060, P. R. China
| | - Shengjie Xu
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, No. 1 Shandan Street, Lanzhou 730060, P. R. China
| | - Shouwei Wang
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, No. 1 Shandan Street, Lanzhou 730060, P. R. China
| | - Rongping Tang
- School of Applied Chemical Engineering, Lanzhou Petrochemical University of Vocational Technology, No. 1 Shandan Street, Lanzhou 730060, P. R. China
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2
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Soda Y, Tatsumi K, Forner M, Sato S, Shibuya K, Matagawa T, Simizu S, Chida N, Okamura T, Sato T. Stereodivergent synthesis of 2-oxo-oligopyrrolidines by an iterative coupling strategy. Org Biomol Chem 2024; 22:3230-3236. [PMID: 38564238 DOI: 10.1039/d4ob00350k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Natural linear polyamines play diverse roles in physiological processes by interacting with receptors at the cellular level. Herein, we describe the stereodivergent synthesis of oligopyrrolidines, which are conformationally constrained polyamines. We synthesized dimeric and trimeric 2-oxo-oligopyrrolidines using an iterative coupling strategy. The key to our success is an iridium-catalyzed trans/cis-selective nucleophilic addition and subsequent threo/erythro-stereoselective reduction. The synthesized pyrrolidines show varying cytotoxicities against a human cancer cell line depending on the number of rings and their stereochemistry.
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Affiliation(s)
- Yasuki Soda
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Kumpei Tatsumi
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Matteo Forner
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo, 5, 35131 Padova, PD, Italy
| | - Shunsei Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Kana Shibuya
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Tomoe Matagawa
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Siro Simizu
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Noritaka Chida
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Toshitaka Okamura
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
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3
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Lu J, Li Z, Deng L. Deoxygenative Nucleophilic Phosphonation and Electrophilic Alkylation of Secondary Amides: A Facile Access to Quaternary α-Aminophosphonates. J Am Chem Soc 2024; 146:4357-4362. [PMID: 38334815 DOI: 10.1021/jacs.3c14517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
The widespread occurrence and synthetic accessibility of amides render them valuable precursors for the synthesis of diverse nitrogen-containing compounds. Herein, we present a metal-free and streamlined synthetic strategy for the synthesis of quaternary α-aminophosphonates. This approach involves sequential deoxygenative nucleophilic phosphonation and versatile electrophilic alkylation of secondary amides in a one-pot fashion. Notably, this method enables the direct bis-functionalization of secondary amides with both nucleophiles and electrophiles for the first time, with simple derivatization leading to valuable free α-aminophosphonates by hydrolysis. The protocol has the advantages of operational simplicity, broad functional-group compatibility, environmental friendliness, and scalability to multigram quantities.
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Affiliation(s)
- Jiaxiang Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310030, China
| | - Zhenghua Li
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310030, China
| | - Li Deng
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310030, China
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4
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Sugiyama Y, Yamada K, Kaneko D, Kusagawa Y, Okamura T, Sato T. Iridium-Catalyzed Reductive (3+2) Annulation of Lactams Enabling the Rapid Total Synthesis of (±)-Eburnamonine. Angew Chem Int Ed Engl 2024; 63:e202317290. [PMID: 38088513 DOI: 10.1002/anie.202317290] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Indexed: 12/30/2023]
Abstract
A reductive (3+2) annulation of lactams through iridium-catalyzed hydrosilylation and photoredox coupling with α-bromoacetic acid was developed. The iridium-catalyzed hydrosilylation of the lactam carbonyl group and subsequent elimination provide a transient cyclic enamine, which undergoes iridium-catalyzed photoredox coupling with α-bromoacetic acid in a one-pot process. The developed conditions show high functional-group tolerance and provide cyclic N,O-acetals containing a quaternary carbon center. The resulting N,O-acetals undergo a variety of acid-mediated nucleophilic addition reactions via iminium ions to give substituted cyclic amines. The developed sequence including reductive (3+2) annulation and acid-mediated nucleophilic addition was successfully applied to the four-step total synthesis of (±)-eburnamonine.
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Affiliation(s)
- Yasukazu Sugiyama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Kento Yamada
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Daiki Kaneko
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Yuya Kusagawa
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Toshitaka Okamura
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
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5
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Huang W, Rao X, Shi L, Yang B, Kuang B, Wu H, Ke S, Liu C. N-Arylation of Amino Acid Esters via an I 2-Mediated Metal-Free Multicomponent Benzannulation Strategy. J Org Chem 2023; 88:16649-16654. [PMID: 37967371 DOI: 10.1021/acs.joc.3c01907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
Herein, we present a novel method for the N-arylation of amino acid esters using α-bromoacetaldehyde acetal and acetoacetate via an I2-mediated metal-free benzannulation strategy, which disclosed the first synthetic application of N-arylation of amino acids using nonaromatic building blocks. The synthesized N-arylated amino acid derivatives were found to possess promising selective inhibition against human hepatocellular liver carcinoma cells, human melanoma cells, and human normal liver cells, with an IC50 value as low as 16.79 μg·mL-1.
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Affiliation(s)
- Wenbo Huang
- Hubei Three Gorges Laboratory, Yichang 443007, China
| | - Xiaofeng Rao
- Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
- Shenzhen Bay Laboratory, Shenzhen 518108, China
| | - Liqiao Shi
- Key Laboratory of Microbial Pesticides, Ministry of Agriculture and Rural Affairs, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Bing Yang
- Hubei Three Gorges Laboratory, Yichang 443007, China
| | - Buxiao Kuang
- Hubei Three Gorges Laboratory, Yichang 443007, China
| | - Hongqu Wu
- Key Laboratory of Microbial Pesticides, Ministry of Agriculture and Rural Affairs, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Shaoyong Ke
- Key Laboratory of Microbial Pesticides, Ministry of Agriculture and Rural Affairs, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Changhui Liu
- School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
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6
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Kehner R, Zhang G, Bayeh-Romero L. Mild Divergent Semireductive Transformations of Secondary and Tertiary Amides via Zirconocene Hydride Catalysis. J Am Chem Soc 2023; 145:4921-4927. [PMID: 36809854 PMCID: PMC10000628 DOI: 10.1021/jacs.2c11786] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Indexed: 02/23/2023]
Abstract
The mild catalytic partial reduction of amides to imines has proven to be a challenging synthetic transformation, with many transition metals directly reducing these substrates to amines. Herein, we report a mild, catalytic method for the semireduction of both secondary and tertiary amides via zirconocene hydride catalysis. Utilizing just 5 mol % of Cp2ZrCl2, the reductive deoxygenation of secondary amides is demonstrated to furnish a diverse array of imines in up to 94% yield with excellent chemoselectivity and without the need for glovebox handling. Moreover, a novel reductive transamination of tertiary amides is also achievable when the catalytic protocol is carried out in the presence of a primary amine at room temperature, providing access to an expanded assortment of imines in up to 98% yield. Through slight procedural tuning, the single-flask conversion of amides to imines, aldehydes, amines or enamines is feasible, including multicomponent syntheses.
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Affiliation(s)
- Rebecca
A. Kehner
- Department of Chemistry and
Biochemistry, Baylor University, Waco, Texas 76706, United States
| | - Ge Zhang
- Department of Chemistry and
Biochemistry, Baylor University, Waco, Texas 76706, United States
| | - Liela Bayeh-Romero
- Department of Chemistry and
Biochemistry, Baylor University, Waco, Texas 76706, United States
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7
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Tang JT, Gan Y, Li X, Ye B. Regioselective reductive transamination of peptidic amides enabled by a dual Zr(IV)–H catalysis. Chem 2022. [DOI: 10.1016/j.chempr.2022.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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8
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Chen H, Wu ZZ, Shao DY, Huang PQ. Multicatalysis protocol enables direct and versatile enantioselective reductive transformations of secondary amides. SCIENCE ADVANCES 2022; 8:eade3431. [PMID: 36417504 PMCID: PMC9683713 DOI: 10.1126/sciadv.ade3431] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
The catalytic asymmetric geminal bis-nucleophilic addition to nonreactive functional groups is a type of highly desirable yet challenging transformation in organic chemistry. Here, we report the first catalytic asymmetric reductive/deoxygenative alkynylation of secondary amides. The method is based on a multicatalysis strategy that merges iridium/copper relay catalysis with organocatalysis. A further combination with the palladium-catalyzed alkyne hydrogenation allows the one-pot enantioselective reductive alkylation of secondary amides. This versatile protocol allows the efficient synthesis of four types of α-branched chiral amines, which are prevalent structural motifs of active pharmaceutical ingredients. The protocol also features excellent enantioselectivity, chemoselectivity, and functional group tolerance to be compatible with more reactive functional groups such as ketone and aldehyde. The synthetic utility of the method was further demonstrated by the late-stage functionalization of two drug derivatives and the concise, first catalytic asymmetric approach to the κ-opioid antagonist aticaprant.
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9
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Electrophile-Dependent Reactivity of Lithiated N-Benzylpyrene-1-Carboxamide. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27123930. [PMID: 35745055 PMCID: PMC9227622 DOI: 10.3390/molecules27123930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 06/13/2022] [Accepted: 06/16/2022] [Indexed: 11/16/2022]
Abstract
In this paper, we describe the lithiation of N-benzylpyrene-1-carboxamide with RLi-TMEDA. We found that the reaction outcome strongly depends on the electrophile used in the quenching step. The electrophile can be introduced at either the benzylic position or at the C-2 position in the pyrene nucleus. Furthermore, when H+ was used as the quencher, the product of the intramolecular carbolithiation of the pyrene K-region was formed. Dehydrogenation of the obtained compound with DDQ allowed the synthesis of a novel nitrogen polycyclic compound with an aza-benzo[c,d]pyrene (azaolympicene) skeleton. Attempts to extend the reaction scope to the amides substituted in the phenyl ring 8a and 8b gave an unexpected result. The reaction of both compounds with BuLi gave 1-valerylpyrene (9) in good yield. Photophysical properties, including absorption spectra, emission spectra and quantum yields of the emission of selected products, were studied and discussed.
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10
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Ablajan K, Tian L, Zhang Q. Iodine-Promoted N-Acylation of Amines with Hydrazide: An Efficient Metal-Free Amidation. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1838-9491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractAn efficient protocol for the amidation of hydrazide with amine has been developed by utilizing I2 as an oxidant under metal- and base-free conditions at room temperature. N-Acylation products of amines were obtained in good to excellent yields without using toxic reagents. This method is operationally straightforward and tolerates aliphatic/aromatic and primary/secondary amines with different hydrazides.
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11
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Agrawal T, Perez-Morales KD, Cort JA, Sieber JD. Asymmetric Synthesis of Propargylic α-Stereogenic Tertiary Amines by Reductive Alkynylation of Tertiary Amides Using Ir/Cu Tandem Catalysis. J Org Chem 2022; 87:6387-6392. [PMID: 35435681 DOI: 10.1021/acs.joc.2c00131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The development of an asymmetric protocol for the reductive alkynylation of amides to access important α-stereogenic tertiary propargylic amines is reported using a tandem Ir-catalyzed hydrosilylation/enantioselective Cu-catalyzed alkynylation. The reaction utilizes a Cu/PyBox catalyst system in the alkynylation step to achieve asymmetry and affords excellent yields with moderate to good levels of enantiocontrol while employing low Ir-catalyst loadings (0.5 mol %).
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Affiliation(s)
- Toolika Agrawal
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284, United States
| | - Kimberly D Perez-Morales
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284, United States
| | - Jermaine A Cort
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284, United States
| | - Joshua D Sieber
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284, United States
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12
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Zha J, Wang Z, Liu B, Tan Q, Xu B. Multicomponent Reaction of Isocyanide, Ditelluride, and Mn(III) Carboxylate: Synthesis of N-Acyl Tellurocarbamate. Org Lett 2022; 24:2863-2867. [PMID: 35420436 DOI: 10.1021/acs.orglett.2c00824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A multicomponent reaction of isocyanides, ditellurides and manganese(III) carboxylates under mild reaction conditions leads to the synthesis of various N-acyl tellurocarbamates. This method demonstrates good functional tolerance and broad substrate scope and, as a result, is especially suitable for the postfunctionalization of complicated molecules such as drugs. The given method can be further extended to the synthesis of selenocarbamates.
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Affiliation(s)
- Jianjian Zha
- Department of Chemistry, Innovative Drug Research Center, Shanghai Engineering Research Center of Organ Repair, Shanghai University, Shanghai 200444, China
| | - Zhuoer Wang
- Department of Chemistry, Innovative Drug Research Center, Shanghai Engineering Research Center of Organ Repair, Shanghai University, Shanghai 200444, China
| | - Bingxin Liu
- Department of Chemistry, Innovative Drug Research Center, Shanghai Engineering Research Center of Organ Repair, Shanghai University, Shanghai 200444, China
| | - Qitao Tan
- Department of Chemistry, Innovative Drug Research Center, Shanghai Engineering Research Center of Organ Repair, Shanghai University, Shanghai 200444, China
| | - Bin Xu
- Department of Chemistry, Innovative Drug Research Center, Shanghai Engineering Research Center of Organ Repair, Shanghai University, Shanghai 200444, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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13
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Liu L, Liu Y, Shen X, Zhang X, Deng S, Chen Y. KO tBu-Mediated Reductive Cyanation of Tertiary Amides for Synthesis of α-Aminonitriles. J Org Chem 2022; 87:6321-6329. [PMID: 35394785 DOI: 10.1021/acs.joc.1c02835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A simple, mild, catalyst-free, and efficacious KOtBu-mediated reductive cyanation reaction of tertiary amides under hydrosilylation conditions has been described. A series of α-aminonitriles is obtained in moderate to high yield with good functional group tolerance. The reaction works well with a readily available amide substrate, a cheap and versatile base KOtBu, and a commercially available hydrosilane (EtO)3SiH and is convenient for workup and purification.
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Affiliation(s)
- Liwen Liu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Yu Liu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Xue Shen
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Xiao Zhang
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Shengqi Deng
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Yang Chen
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
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14
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Interception of enamine intermediates in reductive functionalization of lactams by sodium hydride: Synthesis of 2-cyano-3-iodo piperidines and pyrrolidines. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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15
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Synthesis of tetrazole derivatives through conversion of amide and thioamide functionalities. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03059-w] [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]
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16
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Biallas P, Yamazaki K, Dixon DJ. Difluoroalkylation of Tertiary Amides and Lactams by an Iridium-Catalyzed Reductive Reformatsky Reaction. Org Lett 2022; 24:2002-2007. [PMID: 35258311 PMCID: PMC9082613 DOI: 10.1021/acs.orglett.2c00438] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An iridium-catalyzed, reductive alkylation of abundant tertiary lactams and amides using 1-2 mol % of Vaska's complex (IrCl(CO)(PPh3)2), tetramethyldisiloxane (TMDS), and difluoro-Reformatsky reagents (BrZnCF2R) for the general synthesis of medicinally relevant α-difluoroalkylated tertiary amines is described. A broad scope (46 examples), including N-aryl- and N-heteroaryl-substituted lactams, demonstrated an excellent functional group tolerance. Furthermore, late-stage drug functionalizations, a gram-scale synthesis, and common downstream transformations proved the potential synthetic relevance of this new methodology.
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Affiliation(s)
- Phillip Biallas
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 2JD, U.K
| | - Ken Yamazaki
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 2JD, U.K
| | - Darren J Dixon
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 2JD, U.K
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17
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Sugiyama Y, Soda Y, Yoritate M, Tajima H, Takahashi Y, Shibuya K, Ogihara C, Yokoyama T, Oishi T, Sato T, Chida N. Lactam Strategy Using Amide-Selective Nucleophilic Addition for the Quick Access to Complex Amines: Unified Total Synthesis of Stemoamide-Type Alkaloids. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20210372] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yasukazu Sugiyama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yasuki Soda
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Makoto Yoritate
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Hayato Tajima
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yoshito Takahashi
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kana Shibuya
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Chisato Ogihara
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Takashi Yokoyama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Takeshi Oishi
- School of Medicine, Keio University, 4-1-1, Hiyoshi, Kohoku-ku, Yokohama 223-8521, Japan
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Noritaka Chida
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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18
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SINGH JITENDER, Sharma A. Green and Sustainable Visible Light-Mediated Formation of Amide Bonds: An Emerging Niche in Organic Chemistry. NEW J CHEM 2022. [DOI: 10.1039/d2nj02406c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amide bond is one of the most fascinating functional groups in nature due to its stability, conformational diversity, high bond polarity, and abundance in numerous natural products and drug candidates,...
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19
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Chen J, Lim JW, Ong DY, Chiba S. Iterative addition of carbon nucleophiles to N, N-dialkyl carboxamides for synthesis of α-tertiary amines. Chem Sci 2021; 13:99-104. [PMID: 35059156 PMCID: PMC8694388 DOI: 10.1039/d1sc05876b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 11/25/2021] [Indexed: 12/27/2022] Open
Abstract
A protocol for the synthesis of α-tertiary amines was developed by iterative addition of carbon nucleophiles to N,N-dialkyl carboxamides. Nucleophilic 1,2-addition of organolithium reagents to carboxamides forms anionic tetrahedral carbinolamine (hemiaminal) intermediates, which are subsequently treated with bromotrimethylsilane (Me3SiBr) followed by organomagnesium (Grignard) reagents, organolithium reagents or tetrabutylammonium cyanide, affording α-tertiary amines. Employment of (trimethylsilyl)methylmagnesium bromide as the 2nd nucleophile allowed for aza-Peterson olefination of the resulting α-tertiary (trimethylsilyl)methylamines with acidic work-up, resulting in the formation of 1,1-diarylethylenes.
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Affiliation(s)
- Jiahua Chen
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Jun Wei Lim
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
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20
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Li Z, Zhao F, Ou W, Huang P, Wang X. Asymmetric Deoxygenative Alkynylation of Tertiary Amides Enabled by Iridium/Copper Bimetallic Relay Catalysis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Zhaokun Li
- State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Feng Zhao
- State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Wei Ou
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Pei‐Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
- School of Chemistry and Materials Science Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences 1 Sub-lane Xiangshan Hangzhou 310024 China
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21
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Li Z, Zhao F, Ou W, Huang PQ, Wang X. Asymmetric Deoxygenative Alkynylation of Tertiary Amides Enabled by Iridium/Copper Bimetallic Relay Catalysis. Angew Chem Int Ed Engl 2021; 60:26604-26609. [PMID: 34596947 DOI: 10.1002/anie.202111029] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Indexed: 12/15/2022]
Abstract
A variety of inert tertiary amides have been successfully transformed into synthetically important chiral propargylamines in high yields with good to excellent enantioselectivities via a relayed sequence of Ir catalyzed partial reduction and Cu/GARPHOS catalyzed asymmetric alkynylation with terminal alkynes. The reaction was readily extended to some drug molecules and the transformations of representative products have been demonstrated, thus attesting the practical utilities and the robust nature of the protocol.
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Affiliation(s)
- Zhaokun Li
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Feng Zhao
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Wei Ou
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China.,School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou, 310024, China
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22
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Mao ZY, Nie XD, Feng YM, Si CM, Wei BG, Lin GQ. Cu(OTf) 2 catalyzed Ugi-type reaction of N, O-acetals with isocyanides for the synthesis of pyrrolidinyl and piperidinyl 2-carboxamides. Chem Commun (Camb) 2021; 57:9248-9251. [PMID: 34519320 DOI: 10.1039/d1cc03113a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The Cu(OTf)2 catalyzed Ugi-type reactions of N,O-acetals with isocyanides have been described for the synthesis of pyrrolidinyl and piperidinyl 2-carboxamides. 4-Hydroxy-5-substituted-prolinamides can be obtained in high diastereoselectivities (2,4-cis/trans > 19 : 1) and a stereoselective model was proposed for 2,4-cis selectivity. Moreover, 4-F-VH 032, a novel analog of the VHL ligand, was conveniently obtained by utilizing the present method.
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Affiliation(s)
- Zhuo-Ya Mao
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 220 Handan Road, Shanghai, 200433, China.
| | - Xiao-Di Nie
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 220 Handan Road, Shanghai, 200433, China.
| | - Yi-Man Feng
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 220 Handan Road, Shanghai, 200433, China.
| | - Chang-Mei Si
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 220 Handan Road, Shanghai, 200433, China.
| | - Bang-Guo Wei
- School of Pharmacy and Institutes of Biomedical Sciences, Fudan University, 220 Handan Road, Shanghai, 200433, China.
| | - Guo-Qiang Lin
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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23
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Matheau‐Raven D, Dixon DJ. General α-Amino 1,3,4-Oxadiazole Synthesis via Late-Stage Reductive Functionalization of Tertiary Amides and Lactams*. Angew Chem Int Ed Engl 2021; 60:19725-19729. [PMID: 34191400 PMCID: PMC8457168 DOI: 10.1002/anie.202107536] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Indexed: 01/25/2023]
Abstract
An iridium-catalyzed reductive three-component coupling reaction for the synthesis of medicinally relevant α-amino 1,3,4-oxadiazoles from abundant tertiary amides or lactams, carboxylic acids, and (N-isocyanimino) triphenylphosphorane, is described. Proceeding under mild conditions using (<1 mol %) Vaska's complex (IrCl(CO)(PPh3 )2 ) and tetramethyldisiloxane to access the key reactive iminium ion intermediates, a broad range of α-amino 1,3,4-oxadiazole architectures were accessed from carboxylic acid feedstock coupling partners. Extension to α-amino heterodiazole synthesis was readily achieved by exchanging the carboxylic acid coupling partner for C-, S-, or N-centered Brønsted acids, and provided rapid and modular access to these desirable, yet difficult-to-access, heterocycles. The high chemoselectivity of the catalytic reductive activation step allowed late-stage functionalization of 10 drug molecules, including the synthesis of heterodiazole-fused drug-drug conjugates.
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Affiliation(s)
- Daniel Matheau‐Raven
- Chemistry Research LaboratoryDepartment of ChemistryUniversity of Oxford12 Mansfield RoadOxfordUK
| | - Darren J. Dixon
- Chemistry Research LaboratoryDepartment of ChemistryUniversity of Oxford12 Mansfield RoadOxfordUK
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24
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Matheau‐Raven D, Dixon DJ. General α‐Amino 1,3,4‐Oxadiazole Synthesis via Late‐Stage Reductive Functionalization of Tertiary Amides and Lactams**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107536] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Daniel Matheau‐Raven
- Chemistry Research Laboratory Department of Chemistry University of Oxford 12 Mansfield Road Oxford UK
| | - Darren J. Dixon
- Chemistry Research Laboratory Department of Chemistry University of Oxford 12 Mansfield Road Oxford UK
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25
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Gabriel P, Almehmadi YA, Wong ZR, Dixon DJ. A General Iridium-Catalyzed Reductive Dienamine Synthesis Allows a Five-Step Synthesis of Catharanthine via the Elusive Dehydrosecodine. J Am Chem Soc 2021; 143:10828-10835. [PMID: 34254792 PMCID: PMC8397322 DOI: 10.1021/jacs.1c04980] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Indexed: 02/08/2023]
Abstract
A new reductive strategy for the stereo- and regioselective synthesis of functionalized isoquinuclidines has been developed. Pivoting on the chemoselective iridium(I)-catalyzed reductive activation of β,γ-unsaturated δ-lactams, the efficiently produced reactive dienamine intermediates readily undergo [4 + 2] cycloaddition reactions with a wide range of dienophiles, resulting in the formation of bridged bicyclic amine products. This new synthetic approach was extended to aliphatic starting materials, resulting in the efficient formation of cyclohexenamine products, and readily applied as the key step in the shortest (five-step) total synthesis of vinca alkaloid catharanthine to date, proceeding via its elusive biosynthetic precursor, dehydrosecodine.
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Affiliation(s)
- Pablo Gabriel
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Yaseen A. Almehmadi
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
- Department
of Chemistry, Rabigh College of Science and Arts, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Zeng Rong Wong
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Darren J. Dixon
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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26
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Yamazaki K, Gabriel P, Di Carmine G, Pedroni J, Farizyan M, Hamlin TA, Dixon DJ. General Pyrrolidine Synthesis via Iridium-Catalyzed Reductive Azomethine Ylide Generation from Tertiary Amides and Lactams. ACS Catal 2021; 11:7489-7497. [PMID: 34306810 PMCID: PMC8291578 DOI: 10.1021/acscatal.1c01589] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/19/2021] [Indexed: 02/06/2023]
Abstract
![]()
An
iridium-catalyzed reductive generation of both stabilized and
unstabilized azomethine ylides and their application to functionalized
pyrrolidine synthesis via [3 + 2] dipolar cycloaddition reactions
is described. Proceeding under mild reaction conditions from both
amide and lactam precursors possessing a suitably positioned electron-withdrawing
or a trimethylsilyl group, using 1 mol% Vaska’s complex [IrCl(CO)(PPh3)2] and tetramethyldisiloxane (TMDS) as a terminal
reductant, a broad range of (un)stabilized azomethine ylides were
accessible. Subsequent regio- and diastereoselective, inter- and intramolecular
dipolar cycloaddition reactions with variously substituted electron-deficient
alkenes enabled ready and efficient access to structurally complex
pyrrolidine architectures. Density functional theory (DFT) calculations
of the dipolar cycloaddition reactions uncovered an intimate balance
between asynchronicity and interaction energies of transition structures,
which ultimately control the unusual selectivities observed in certain
cases.
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Affiliation(s)
- Ken Yamazaki
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), and Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Pablo Gabriel
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Graziano Di Carmine
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Julia Pedroni
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Mirxan Farizyan
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Trevor A. Hamlin
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), and Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Darren J. Dixon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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27
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Wood MD, Klosowski DW, Martin SF. Tandem vinylogous Mannich and hetero Diels-Alder reactions: Concise total synthesis of (±)-Alstoscholarisine E. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132150] [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]
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28
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Czerwiński PJ, Furman B. Reductive Functionalization of Amides in Synthesis and for Modification of Bioactive Compounds. Front Chem 2021; 9:655849. [PMID: 33981672 PMCID: PMC8107389 DOI: 10.3389/fchem.2021.655849] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 02/23/2021] [Indexed: 11/13/2022] Open
Abstract
In this review, applications of the amide reductive functionalization methodology for the synthesis and modification of bioactive compounds are covered. A brief summary of the different protocols is presented in the introduction, followed by the synthetic application of these in late-stage functionalization, leading to known pharmaceuticals or to their derivatives, including bioisosteres, with potential higher activity as the main axis of the article. The synthetic approach to natural products based on amide reduction is also discussed; however, this is given in a condensed form focusing on recent or as yet unexplored applications due to a number of recently published excellent reviews covering this topic. The aim of this review is to illustrate the potential of reductive functionalization of amides as an elegant and useful tool in the synthesis of bioactive compounds and inspire further work in this field.
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Affiliation(s)
- Paweł J Czerwiński
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Bartłomiej Furman
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland
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29
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Katahara S, Sugiyama Y, Yamane M, Komiya Y, Sato T, Chida N. Five-Step Total Synthesis of (±)-Aspidospermidine by a Lactam Strategy via an Azomethine Ylide. Org Lett 2021; 23:3058-3063. [DOI: 10.1021/acs.orglett.1c00735] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Seiya Katahara
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yasukazu Sugiyama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Mina Yamane
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yukinori Komiya
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Noritaka Chida
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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30
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Więcław MM, Furman B. Direct synthesis of anomeric tetrazolyl iminosugars from sugar-derived lactams. Beilstein J Org Chem 2021; 17:115-123. [PMID: 33519998 PMCID: PMC7814180 DOI: 10.3762/bjoc.17.12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 12/16/2020] [Indexed: 11/23/2022] Open
Abstract
Herein we present the direct asymmetric synthesis of tetrazole-functionalized 1-deoxynojirimycin derivatives from simple sugars via a Schwartz’s reagent-mediated reductive amide functionalization followed by a variant of the Ugi–azide multicomponent reaction. The anomeric configurations of two products were unambiguously confirmed by X-ray analysis. This work also describes examples of interesting further transformations of the title products. Finally, some surprising observations regarding the mechanism of their formation were made.
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Affiliation(s)
- Michał Mateusz Więcław
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Bartłomiej Furman
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
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31
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Boit TB, Mehta MM, Kim J, Baker EL, Garg NK. Reductive Arylation of Amides via a Nickel‐Catalyzed Suzuki–Miyaura‐Coupling and Transfer‐Hydrogenation Cascade. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202012048] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Timothy B. Boit
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Milauni M. Mehta
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Junyong Kim
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Emma L. Baker
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Neil K. Garg
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
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32
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Boit TB, Mehta MM, Kim J, Baker EL, Garg NK. Reductive Arylation of Amides via a Nickel-Catalyzed Suzuki-Miyaura-Coupling and Transfer-Hydrogenation Cascade. Angew Chem Int Ed Engl 2021; 60:2472-2477. [PMID: 33029868 PMCID: PMC7855255 DOI: 10.1002/anie.202012048] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 09/26/2020] [Indexed: 12/11/2022]
Abstract
We report a means to achieve the addition of two disparate nucleophiles to the amide carbonyl carbon in a single operational step. Our method takes advantage of non-precious-metal catalysis and allows for the facile conversion of amides to chiral alcohols via a one-pot Suzuki-Miyaura cross-coupling/transfer-hydrogenation process. This study is anticipated to promote the development of new transformations that allow for the conversion of carboxylic acid derivatives to functional groups bearing stereogenic centers via cascade processes.
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Affiliation(s)
- Timothy B Boit
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Milauni M Mehta
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Junyong Kim
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Emma L Baker
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Neil K Garg
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
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33
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He Y, Wang X. Synthesis of Cyclic Amidines by Iridium-Catalyzed Deoxygenative Reduction of Lactams and Tandem Reaction with Sulfonyl Azides. Org Lett 2020; 23:225-230. [DOI: 10.1021/acs.orglett.0c03953] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Youliang He
- State Key Laboratory of Oganometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences (CAS), 345 Lingling Road, Shanghai 200032, P. R. China
| | - Xiaoming Wang
- State Key Laboratory of Oganometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences (CAS), 345 Lingling Road, Shanghai 200032, P. R. China
- School of Chemistry and Material Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, P. R. China
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34
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Ong DY, Chen JH, Chiba S. Reductive Functionalization of Carboxamides: A Recent Update. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200182] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Jia-hua Chen
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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35
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Shiri M, Farajinia-Lehi N, Salehi P, Tanbakouchian Z. Transition Metal and Inner Transition Metal Catalyzed Amide Derivatives Formation through Isocyanide Chemistry. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractThe synthesis of amides is a substantial research area in organic chemistry because of their ubiquitous presence in natural products and bioactive molecules. The use of easily accessible isocyanides as amidoyl (carbamoyl) synthons in cross-coupling reactions using transition metal and inner transition metöal catalysts is a current trend in this area. Isocyanides, owing to their coordination ability as a ligand and inherent electronic properties for reactions with various partners, have expanded the potential application of these transformations for the preparation of novel synthetic molecules and pharmaceutical candidates. This review gives an overview of the achievements in isocyanide-based transition metal and inner transition metal catalyzed amide formation and discusses highlights of the proposed distinct mechanisms.1 Introduction2 Synthesis of Arenecarboxamides3 Synthesis of Alkanamides4 Synthesis of Cyclic Amides5 Formation of Alkynamides6 Formation of Acrylamide-like Molecules7 Formation of Ureas and Carbamates8 Conclusion
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Affiliation(s)
- Morteza Shiri
- Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University
- Department of R&D, Pakshoo Industrial Group, Second Alley
| | | | - Parvin Salehi
- Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University
| | - Zahra Tanbakouchian
- Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University
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36
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Boit TB, Bulger AS, Dander JE, Garg NK. Activation of C-O and C-N Bonds Using Non-Precious-Metal Catalysis. ACS Catal 2020; 10:12109-12126. [PMID: 33868770 PMCID: PMC8049354 DOI: 10.1021/acscatal.0c03334] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Timothy B Boit
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Ana S Bulger
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Jacob E Dander
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Neil K Garg
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
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37
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Soda Y, Sugiyama Y, Yoritate M, Tajima H, Shibuya K, Ogihara C, Oishi T, Sato T, Chida N. Unified Total Synthesis of Pentacyclic Stemoamide-type Alkaloids. Org Lett 2020; 22:7502-7507. [DOI: 10.1021/acs.orglett.0c02697] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yasuki Soda
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yasukazu Sugiyama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Makoto Yoritate
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Hayato Tajima
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kana Shibuya
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Chisato Ogihara
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Takeshi Oishi
- School of Medicine, Keio University, 4-1-1, Hiyoshi,
Kohoku-ku, Yokohama 223-8521, Japan
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Noritaka Chida
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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38
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Rogova T, Gabriel P, Zavitsanou S, Leitch JA, Duarte F, Dixon DJ. Reverse Polarity Reductive Functionalization of Tertiary Amides via a Dual Iridium-Catalyzed Hydrosilylation and Single Electron Transfer Strategy. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03089] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Tatiana Rogova
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Pablo Gabriel
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Stamatia Zavitsanou
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Jamie A. Leitch
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Fernanda Duarte
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Darren J. Dixon
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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39
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Matheau-Raven D, Gabriel P, Leitch JA, Almehmadi YA, Yamazaki K, Dixon DJ. Catalytic Reductive Functionalization of Tertiary Amides using Vaska’s Complex: Synthesis of Complex Tertiary Amine Building Blocks and Natural Products. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02377] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Daniel Matheau-Raven
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Pablo Gabriel
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Jamie A. Leitch
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Yaseen A. Almehmadi
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Ken Yamazaki
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Darren J. Dixon
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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40
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Link A, Zhou Y, Buchwald SL. CuH-Catalyzed Asymmetric Reductive Amidation of α,β-Unsaturated Carboxylic Acids. Org Lett 2020; 22:5666-5670. [PMID: 32628019 PMCID: PMC8027949 DOI: 10.1021/acs.orglett.0c02064] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The direct enantioselective copper hydride (CuH)-catalyzed synthesis of β-chiral amides from α,β-unsaturated carboxylic acids and secondary amines under mild reaction conditions is reported. The method utilizes readily accessible carboxylic acids and tolerates a variety of functional groups in the β-position including several heteroarenes. A subsequent iridium-catalyzed reduction to γ-chiral amines can be performed in the same flask without purification of the intermediate amides.
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Affiliation(s)
- Achim Link
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yujing Zhou
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Stephen L. Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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41
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Ong DY, Fan D, Dixon DJ, Chiba S. Transition-Metal-Free Reductive Functionalization of Tertiary Carboxamides and Lactams for α-Branched Amine Synthesis. Angew Chem Int Ed Engl 2020; 59:11903-11907. [PMID: 32329555 DOI: 10.1002/anie.202004272] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Indexed: 12/29/2022]
Abstract
A new method for the synthesis of α-branched amines by reductive functionalization of tertiary carboxamides and lactams is described. The process relies on the efficient and controlled reduction of tertiary amides by a sodium hydride/sodium iodide composite, in situ treatment of the resulting anionic hemiaminal with trimethylsilyl chloride and subsequent coupling with nucleophilic reagents including Grignard reagents and tetrabutylammonium cyanide. The new method exhibits broad functional-group compatibility, operates under transition-metal-free reaction conditions, and is suitable for various synthetic applications on both sub-millimole and on multigram scales.
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Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Dongyang Fan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Darren J Dixon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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42
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Ong DY, Fan D, Dixon DJ, Chiba S. Transition‐Metal‐Free Reductive Functionalization of Tertiary Carboxamides and Lactams for α‐Branched Amine Synthesis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004272] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Dongyang Fan
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Darren J. Dixon
- Department of Chemistry Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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43
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Tahara A, Nagashima H. Recent topics of iridium-catalyzed hydrosilylation of tertiary amides to silylhemiaminals. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151423] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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44
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Yurino T, Tange Y, Tani R, Ohkuma T. Ag2O-catalysed nucleophilic isocyanation: selective formation of less-stable benzylic isonitriles. Org Chem Front 2020. [DOI: 10.1039/d0qo00336k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Both primary and secondary benzylic isonitriles were exclusively produced by the Ag2O-catalysed reaction of benzylic phosphates and trimethylsilyl cyanide without formation of the thermodynamically favoured regioisomers, benzylic nitriles.
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Affiliation(s)
- Taiga Yurino
- Division of Applied Chemistry and Frontier Chemistry Centre
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
| | - Yuji Tange
- Graduate School of Chemical Sciences and Engineering
- Hokkaido University
- Sapporo
- Japan
| | - Ryutaro Tani
- Graduate School of Chemical Sciences and Engineering
- Hokkaido University
- Sapporo
- Japan
| | - Takeshi Ohkuma
- Division of Applied Chemistry and Frontier Chemistry Centre
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
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45
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Li D, Shen X, Lei J. Metal-Free Iodine/TEMPO-Mediated Aerobic Oxidative Ugi-Type Multicomponent Reactions with Tertiary Amines. J Org Chem 2019; 85:2466-2475. [DOI: 10.1021/acs.joc.9b03168] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Dengke Li
- College of Chemistry and Environmental Science; Center for Yunnan-Guizhou Plateau Chemical Functional Materials and Pollution Control, Qujing Normal University, Qujing 655011, Yunnan, China
| | - Xianfu Shen
- College of Chemistry and Environmental Science; Center for Yunnan-Guizhou Plateau Chemical Functional Materials and Pollution Control, Qujing Normal University, Qujing 655011, Yunnan, China
| | - Jian Lei
- College of Chemical Engineering and Material, Quanzhou Normal University, Quanzhou 362000, Fujian, China
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46
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Ou W, Lu GS, An D, Han F, Huang PQ. Two-Step Catalytic Transformation of N
-Benzyllactams to Alkaloids (±)-Solenopsin, (±)-Solenopsin A, and (+)-Julifloridine. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901752] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Wei Ou
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian P. R. China
| | - Guang-Sheng Lu
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian P. R. China
| | - Dong An
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian P. R. China
| | - Feng Han
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry; Fujian Provincial Key Laboratory of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian P. R. China
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47
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Wood MD, Klosowski DW, Martin SF. Stereoselective Total Synthesis of (±)-Alstoscholarisine E. Org Lett 2019; 22:786-790. [DOI: 10.1021/acs.orglett.9b04093] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Michael D. Wood
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Daniel W. Klosowski
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Stephen F. Martin
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
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48
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Baráth E, Mejía E. Ein Fest der Wissenschaft inmitten der Natur: Die 54. Bürgenstock‐Konferenz. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Eszter Baráth
- Department ChemieZentralforschungsinstitut für KatalyseTechnische Universität München Lichtenbergstraße 4 85748 Garching Deutschland
| | - Esteban Mejía
- Leibniz-Institut für Katalyse (LIKAT) Albert-Einstein-Straße 29a 18059 Rostock Deutschland
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49
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Baráth E, Mejía E. A Celebration of Science amidst Nature: The 54th Bürgenstock Conference. Angew Chem Int Ed Engl 2019; 58:17107-17113. [PMID: 31441577 DOI: 10.1002/anie.201906781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Eszter Baráth
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748, Garching, Germany
| | - Esteban Mejía
- Leibniz Institute for Catalysis (LIKAT), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
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50
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Liu YP, Zhu CJ, Yu CC, Wang AE, Huang PQ. Tf2
O-Mediated Intermolecular Coupling of Secondary Amides with Enamines or Ketones: A Versatile and Direct Access to β-Enaminones. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901354] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yong-Peng Liu
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian China
| | - Cheng-Jie Zhu
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian China
| | - Cun-Cun Yu
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian China
| | - Ai-E Wang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian China
- College of Chemistry and Chemical Engineering; State Key Laboratory of Applied Organic Chemistry Lanzhou University; 730000 Lanzhou China
| | - Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology; College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian China
- College of Chemistry and Chemical Engineering; State Key Laboratory of Applied Organic Chemistry Lanzhou University; 730000 Lanzhou China
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