1
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Pati SS, Mishra A, Das JP. Regio- and Stereocontrolled Hydrohalogenation of Ynamides with N-Halosuccinimides (NXS) as the Halogen Source: Synthesis of ( E)-α-Haloenamides. J Org Chem 2024; 89:1727-1735. [PMID: 38237061 DOI: 10.1021/acs.joc.3c02436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Presented herein is a facile stereoselective construction of synthetically versatile chiral and achiral (E)-α-haloenamides under mild conditions utilizing N-halosuccinimides and diphenylphosphine oxide. This reaction is metal-free, mild, efficient, very rapid, and practical and highlights the synthetic versatility of ynamides. The reaction has a broad substrate scope; both chiral and achiral ynamides have been transformed into the corresponding (E)-α-haloenamides within a very short period of time without compromising selectivity or complexity.
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Affiliation(s)
- Subhransu S Pati
- Organic Synthesis and Catalysis Laboratory, Department of Chemistry, Ravenshaw University, Cuttack 753003, India
| | - Archana Mishra
- Organic Synthesis and Catalysis Laboratory, Department of Chemistry, Ravenshaw University, Cuttack 753003, India
| | - Jaya P Das
- Organic Synthesis and Catalysis Laboratory, Department of Chemistry, Ravenshaw University, Cuttack 753003, India
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2
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Maity A, Sahoo AK. Copper-Catalyzed Regio- and Stereoselective Hydroarylation of Ynamide. J Org Chem 2024. [PMID: 38170946 DOI: 10.1021/acs.joc.3c01720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Presented herein is a copper-catalyzed trans-hydroarylation of ynamides. The reaction showcases the assembly of boronic acids across the carbon-carbon triple bond of ynamides. The reaction proceeds under mild conditions offering a complementary approach for the versatile synthesis of multifunctional (E)-α,β-disubstituted enamides. Moreover, the hydroarylation process is highly regio- and stereoselective. The transformation shows a broad scope (30 examples) and tolerates a wide range of labile functional groups. Control experiments provide substantive evidence supporting the mechanistic cycle and the observed selectivity.
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Affiliation(s)
- Avijit Maity
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Akhila K Sahoo
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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3
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Yao L, Li W, Xiao F, Deng GJ. Three-Component Tandem Amidosulfenylation of Alkenes for the Synthesis of β-Succinimide Sulfides. J Org Chem 2023; 88:13956-13966. [PMID: 37699255 DOI: 10.1021/acs.joc.3c01518] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
An environmentally benign multicomponent strategy for the amidosulfenylation of alkenes for the synthesis of β-succinimide sulfides is disclosed. In this process, common disulfides smoothly act as a sulfur-based source, and N-iodosuccinimide (NIS) is used not only as a free radical initiator but also as an N-nucleophile. A broad range of functional groups are tolerated in this reaction system.
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Affiliation(s)
- Lin Yao
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Wenjian Li
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Fuhong Xiao
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Guo-Jun Deng
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
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4
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Ganaie BA, Ara T, Banday JA, Bhat BA. BF 3·OEt 2 Mediated Ethylation of Phenols: A New Protection Group Strategy. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2021.1937237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Tabassum Ara
- National Institute of Technology, Srinagar, Srinagar, India
| | | | - Bilal A. Bhat
- CSIR-Natural Products Medicinal Chemistry Division, Indian Institute of Integrative Medicine Sanatnagar, Srinagar, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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5
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Liang PY, Dai Y, Lu K, Yan CX, Liu Y, Zhou PP, Yang Z. DABCO-mediated [4 + 4]-domino annulation reactions of ynones and α-cyano-α,β-unsaturated ketones: Mechanisms and the role of DABCO. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2021.113396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Chen XY, Yuan S, Chen Y, Sun C, Tang Y, Chen G, Zhu B, Chen K, Zheng S, Cheng X. Solvent-controlled two-step one-pot syntheses of α-X (X = Br or Cl) enamino ketones/esters and 3-(2,5-dioxopyrrolidin-1-yl)acrylate by using terminal carbonyl alkynes. Org Biomol Chem 2021; 19:7914-7919. [PMID: 34549232 DOI: 10.1039/d1ob01308d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new two-step one-pot aminobromination/chlorination of carbonyl alkynes has been achieved via a Michael addition of aliphatic secondary amines and subsequent β-bromination/chlorination of the obtained enamines to afford various α-X (X = Br or Cl) enamino ketones/esters in moderate to good yields. A solvent-controllable protocol has been developed to produce versatile 3-(2,5-dioxopyrrolidin-1-yl)acrylates in moderate yields by using toluene as the solvent and chain alkyl propiolates as alkynyl substrates.
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Affiliation(s)
- Xiao Yun Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Mengxi Road No. 2, Zhenjiang, 212003, P. R. China.
| | - Shuxia Yuan
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Mengxi Road No. 2, Zhenjiang, 212003, P. R. China.
| | - Yan Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Mengxi Road No. 2, Zhenjiang, 212003, P. R. China.
| | - Chenyang Sun
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Mengxi Road No. 2, Zhenjiang, 212003, P. R. China.
| | - Yaonan Tang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Mengxi Road No. 2, Zhenjiang, 212003, P. R. China.
| | - Guang Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Mengxi Road No. 2, Zhenjiang, 212003, P. R. China.
| | - Baocheng Zhu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Mengxi Road No. 2, Zhenjiang, 212003, P. R. China.
| | - Kaiwei Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Mengxi Road No. 2, Zhenjiang, 212003, P. R. China.
| | - Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Mengxi Road No. 2, Zhenjiang, 212003, P. R. China.
| | - Xiaofang Cheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Mengxi Road No. 2, Zhenjiang, 212003, P. R. China.
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7
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Chen M, Liang Y, Dong T, Liang W, Liu Y, Zhang Y, Huang X, Kong L, Wang ZX, Peng B. Z-Selective α-Arylation of α,β-Unsaturated Nitriles via [3,3]-Sigmatropic Rearrangement. Angew Chem Int Ed Engl 2021; 60:2339-2345. [PMID: 33017503 DOI: 10.1002/anie.202010740] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/28/2020] [Indexed: 12/19/2022]
Abstract
The Morita-Baylis-Hillman (MBH) reaction and [3, 3]-sigmatropic rearrangement are two paradigms in organic synthesis. We have merged the two types of reactions to achieve [3,3]-rearrangement of aryl sulfoxides with α,β-unsaturated nitriles. The reaction was achieved by sequentially treating both coupling partners with electrophilic activator (Tf2 O) and base, offering an effective approach to prepare synthetically versatile α-aryl α,β-unsaturated nitriles with Z-selectivity through direct α-C-H arylation of unmodified α,β-unsaturated nitriles. The control experiments and DFT calculations support a four-stage reaction sequence, including the assembly of Tf2 O activated aryl sulfoxide with α,β-unsaturated nitrile, MBH-like Lewis base addition, [3,3]-rearrangement, and E1cB-elimination. Among these stages, the Lewis base addition is diastereoselective and E1cB-elimination is cis-selective, which could account for the remarkable Z-selectivity of the reaction.
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Affiliation(s)
- Mengyuan Chen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Yuchen Liang
- School of Chemical Science, University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Taotao Dong
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Weijian Liang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Yanping Liu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Yage Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Xin Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Lichun Kong
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Zhi-Xiang Wang
- School of Chemical Science, University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Bo Peng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
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8
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Chen M, Liang Y, Dong T, Liang W, Liu Y, Zhang Y, Huang X, Kong L, Wang Z, Peng B. Z
‐Selective α‐Arylation of α,β‐Unsaturated Nitriles via [3,3]‐Sigmatropic Rearrangement. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010740] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mengyuan Chen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 China
| | - Yuchen Liang
- School of Chemical Science University of the Chinese Academy of Sciences Beijing 100049 China
| | - Taotao Dong
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 China
| | - Weijian Liang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 China
| | - Yanping Liu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 China
| | - Yage Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 China
| | - Xin Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 China
| | - Lichun Kong
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 China
| | - Zhi‐Xiang Wang
- School of Chemical Science University of the Chinese Academy of Sciences Beijing 100049 China
| | - Bo Peng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 China
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9
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Cai X, Yang M, Guo H. Tertiary Enamides: Versatile and Available Substrates in Synthetic Chemistry. Curr Org Synth 2020; 16:70-97. [PMID: 31965923 DOI: 10.2174/1570179415666181107122814] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 09/29/2018] [Accepted: 10/03/2018] [Indexed: 12/31/2022]
Abstract
BACKGROUND Enamines and their variant enamides as powerful and versatile synthons have attracted great attention in synthetic chemistry. Enamides display unique stability and reduce enaminic reactivity in view of the electron-withdrawing effect of N-acyl group. A great deal of satisfactory achievements in the synthesis and application of enamides has been made in recent years. Especially, tertiary enamides without N-H bond regarded as low reactivity of compounds in the past can act as excellent nucleophiles to react with electrophiles for the construction of various nitrous molecules. OBJECTIVE This review focuses on recent advances on tertiary enamides in the synthetic strategies and applications including addition, coupling reaction, functionalization and electro- or photo-chemical reaction. CONCLUSION Tertiary enamides as electron-deficient nucleophiles display a satisfactory balance between stability and reactivity to offer multiple opportunities for the construction of various functionalized nitrogencontaining compounds. Further exploration of the reactive mechanisms involved tertiary enamides and the development of novel and efficient transformations to generate ever more complex building blocks starting from tertiary enamides are particularly worth pursuing.
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Affiliation(s)
- Xiaohua Cai
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Mengzhi Yang
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Hui Guo
- School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China
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10
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Park K, Matsuda T, Yamada T, Monguchi Y, Sawama Y, Doi N, Sasai Y, Kondo SI, Sawama Y, Sajiki H. Direct Deuteration of Acrylic and Methacrylic Acid Derivatives Catalyzed by Platinum on Carbon in Deuterium Oxide. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800170] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Kwihwan Park
- Laboratory of Organic Chemistry; Gifu Pharmaceutical University; 1-25-4 Daigaku-nishi Gifu 501-1196 Japan
| | - Takumi Matsuda
- Laboratory of Organic Chemistry; Gifu Pharmaceutical University; 1-25-4 Daigaku-nishi Gifu 501-1196 Japan
| | - Tsuyoshi Yamada
- Laboratory of Organic Chemistry; Gifu Pharmaceutical University; 1-25-4 Daigaku-nishi Gifu 501-1196 Japan
| | - Yasunari Monguchi
- Laboratory of Organic Chemistry; Gifu Pharmaceutical University; 1-25-4 Daigaku-nishi Gifu 501-1196 Japan
| | - Yuka Sawama
- Laboratory of Pharmaceutical Physical Chemistry; Gifu Pharmaceutical University; 1-25-4 Daigaku-nishi Gifu 501-1196 Japan
| | - Naoki Doi
- Laboratory of Pharmaceutical Physical Chemistry; Gifu Pharmaceutical University; 1-25-4 Daigaku-nishi Gifu 501-1196 Japan
| | - Yasushi Sasai
- Laboratory of Pharmaceutical Physical Chemistry; Gifu Pharmaceutical University; 1-25-4 Daigaku-nishi Gifu 501-1196 Japan
| | - Shin-ichi Kondo
- Laboratory of Pharmaceutical Physical Chemistry; Gifu Pharmaceutical University; 1-25-4 Daigaku-nishi Gifu 501-1196 Japan
| | - Yoshinari Sawama
- Laboratory of Organic Chemistry; Gifu Pharmaceutical University; 1-25-4 Daigaku-nishi Gifu 501-1196 Japan
| | - Hironao Sajiki
- Laboratory of Organic Chemistry; Gifu Pharmaceutical University; 1-25-4 Daigaku-nishi Gifu 501-1196 Japan
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11
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Cheng C, Zhang J, Wang X, Miao Z. DBU-Promoted [4 + 4] Domino Cycloaddition of Ynones with Benzylidenepyrazolones To Access Eight-Membered Cyclic Ethers. J Org Chem 2018; 83:5450-5457. [DOI: 10.1021/acs.joc.8b00352] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Cheng Cheng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China
| | - Jiayong Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China
| | - Xue Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China
| | - Zhiwei Miao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China
- Collaborative
Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
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12
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Bhat MA, Malik RA, Prakash P, Lone AM. Preparation and evaluation of antibacterial potential of Pithecellobium dulce root extract against Gram positive and Gram negative bacteria. Microb Pathog 2018; 116:49-53. [DOI: 10.1016/j.micpath.2018.01.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 01/08/2018] [Accepted: 01/09/2018] [Indexed: 10/18/2022]
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13
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14
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Synthesis and in vitro evaluation of 2-(((2-ether)amino)methylene)-dimedone derivatives as potential antimicrobial agents. Microb Pathog 2018; 114:431-435. [DOI: 10.1016/j.micpath.2017.12.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 12/06/2017] [Accepted: 12/08/2017] [Indexed: 11/18/2022]
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15
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Jin H, Li E, Huang Y. Divergent synthesis of hydropyridine derivatives via nitrogen-containing Lewis base mediated regioselective [4 + 2] cyclizations. Org Chem Front 2017. [DOI: 10.1039/c7qo00596b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A nitrogen-containing Lewis base mediated regioselective [4 + 2] cyclization strategy between allenic esters and α,β-unsaturated ketimines was discovered.
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Affiliation(s)
- Hongxing Jin
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 30071
- China
| | - Erqing Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 30071
- China
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 30071
- China
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16
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Jiang H, Huang W, Yu Y, Yi S, Li J, Wu W. Transition-metal-free synthesis of β-trifluoromethylated enamines with trifluoromethanesulfinate. Chem Commun (Camb) 2017. [DOI: 10.1039/c7cc03125d] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Direct olefinic C–H trifluoromethylation of enamines is developed under transition metal-free conditions by using Langlois' reagent (NaSO2CF3).
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Affiliation(s)
- Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Wei Huang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Yue Yu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Songjian Yi
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Jiawei Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
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17
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Carpenter C, Sorenson RJ, Jin Y, Klossowski S, Cierpicki T, Gnegy M, Showalter HD. Design and synthesis of triarylacrylonitrile analogues of tamoxifen with improved binding selectivity to protein kinase C. Bioorg Med Chem 2016; 24:5495-5504. [PMID: 27647375 DOI: 10.1016/j.bmc.2016.09.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 08/30/2016] [Accepted: 09/01/2016] [Indexed: 12/11/2022]
Abstract
The clinical selective estrogen receptor modulator tamoxifen is also a modest inhibitor of protein kinase C, a target implicated in several untreatable brain diseases such as amphetamine abuse. This inhibition and tamoxifen's ability to cross the blood brain barrier make it an attractive scaffold to conduct further SAR studies toward uncovering effective therapies for such diseases. Utilizing the known compound 6a as a starting template and guided by computational tools to derive physicochemical properties known to be important for CNS permeable drugs, the design and synthesis of a small series of novel triarylacrylonitrile analogues have been carried out providing compounds with enhanced potency and selectivity for PKC over the estrogen receptor relative to tamoxifen. Shortened synthetic routes compared to classical procedures have been developed for analogues incorporating a β-phenyl ring, which involve installing dialkylaminoalkoxy side chains first off the α and/or α' rings of a precursor benzophenone and then condensing the resultant ketones with phenylacetonitrile anion. A second novel, efficient and versatile route utilizing Suzuki chemistry has also been developed, which will allow for the introduction of a wide range of β-aryl or β-heteroaryl moieties and side-chain substituents onto the acrylonitrile core. For analogues possessing a single side chain off the α- or α'-ring, novel 2D NMR experiments have been carried out that allow for unambiguous assignment of E- and Z-stereochemistry. From the SAR analysis, one compound, 6c, shows markedly increased potency and selectivity for inhibiting PKC with an IC50 of 80nM for inhibition of PKC protein substrate and >10μM for binding to the estrogen receptor α (tamoxifen IC50=20μM and 222nM, respectively). The data on 6c provide support for further exploration of PKC as a druggable target for the treatment of amphetamine abuse.
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Affiliation(s)
- Colleen Carpenter
- Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, United States
| | - Roderick J Sorenson
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, MI 48109, United States; Vahlteich Medicinal Chemistry Core, University of Michigan, Ann Arbor, MI 48109, United States
| | - Yafei Jin
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, MI 48109, United States; Vahlteich Medicinal Chemistry Core, University of Michigan, Ann Arbor, MI 48109, United States
| | - Szymon Klossowski
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109, United States
| | - Tomasz Cierpicki
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109, United States
| | - Margaret Gnegy
- Department of Pharmacology, University of Michigan, Ann Arbor, MI 48109, United States
| | - Hollis D Showalter
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, MI 48109, United States; Vahlteich Medicinal Chemistry Core, University of Michigan, Ann Arbor, MI 48109, United States.
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18
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Chen L, Yu L, Deng Y, Cui Y, Bian G, Cao J. Synthesis of α-haloenamides via zinc halide mediated direct addition of benzhydryl halides to ynamides. Org Biomol Chem 2016; 14:564-569. [PMID: 26511901 DOI: 10.1039/c5ob01950h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A regio- and stereoselective synthesis of highly substituted α-haloenamides was described via the zinc halide mediated direct addition of benzhydryl halides to ynamides under mild conditions. The products α-haloenamides were further transformed into multisubstituted enamides via Suzuki and Sonogashira cross-coupling reactions.
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Affiliation(s)
- Ling Chen
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, No. 1378, Wenyi West Road, Science Park of HZNU, Hangzhou, P.R. China.
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19
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Xiao Q, He Q, Li J, Wang J. 1,4-Diazabicyclo[2.2.2]octane-Promoted Aminotrifluoromethylthiolation of α,β-Unsaturated Carbonyl Compounds: N-Trifluoromethylthio-4-nitrophthalimide Acts as Both the Nitrogen and SCF3 Sources. Org Lett 2015; 17:6090-3. [DOI: 10.1021/acs.orglett.5b03116] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Qing Xiao
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Qijie He
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Juncheng Li
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Jun Wang
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
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20
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Xing L, Li C. Stereoselective Chlorination and Bromination of Enamides and Enamines via an Electrostatic Attraction Effect Using (1,1-Diacetoxyiodo)benzene and a Halide Source. J Org Chem 2015; 80:10000-8. [DOI: 10.1021/acs.joc.5b01603] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Linlin Xing
- Department of Chemistry,
School of Science, Tianjin University, Tianjin 300072, China
| | - Chunbao Li
- Department of Chemistry,
School of Science, Tianjin University, Tianjin 300072, China
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21
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Liang L, Li E, Dong X, Huang Y. DABCO-Mediated [4 + 4]-Domino Annulation: Access to Functionalized Eight-Membered Cyclic Ethers. Org Lett 2015; 17:4914-7. [DOI: 10.1021/acs.orglett.5b02498] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Ling Liang
- State Key Laboratory and
Institute of Elemento-Organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 30071, China
| | - Erqing Li
- State Key Laboratory and
Institute of Elemento-Organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 30071, China
| | - Xuelin Dong
- State Key Laboratory and
Institute of Elemento-Organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 30071, China
| | - You Huang
- State Key Laboratory and
Institute of Elemento-Organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 30071, China
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