1
|
Liu N, Cuan X, Li H, Duan X. Progress in the Study of α-Functionalization of Enaminone. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202207027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
|
2
|
Duan X, Liu K, Meng Z, Guo Y, Li H, Liu N, Qu W, Duan X, Ma J. 1,3-Dibromo-5, 5-dimethylhydantoin (DBDMH)-Promoted Cross-Coupling of Enaminones with Phenols under Metal-Free Conditions. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
3
|
Chen XY, Zhang X, Wan JP. Recent advances in transition metal-free annulation toward heterocycle diversity based on the C-N bond cleavage of enaminone platform. Org Biomol Chem 2022; 20:2356-2369. [DOI: 10.1039/d2ob00126h] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enaminones and analogous stable enamines are well known as platform building blocks in organic synthesis for construction of heterocyclic compounds, especially N-heterocycles. To date, especially enaminones have been successfully...
Collapse
|
4
|
Barve BD, Kuo YH, Li WT. Pd-Catalyzed and ligand-enabled alkene difunctionalization via unactivated C-H bond functionalization. Chem Commun (Camb) 2021; 57:12045-12057. [PMID: 34724518 DOI: 10.1039/d1cc04397h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Palladium-catalyzed and ligand-enabled C-H functionalization methods have emerged as a powerful approach for the preparation of therapeutically important motifs and complex natural products. Olefins, owing to their natural abundance, have been extensively employed for the formation of C-C and C-X bonds and the generation of various heterocycles. Traditionally, activated as well as starting materials with preinstalled functional groups, and also halide substrates under transition metal catalysis, have been employed for olefin difunctionalization. However, strategies for employing unactivated C-H bond functionalization to achieve alkene difunctionalization have rarely been explored. A possible solution to this challenge is the application of bulky ligands which enhances the reductive elimination pathway and inhibits β-hydride elimination to selectively yield difunctionalized alkene products. This feature article summarizes the utilization of unreactive C-H bonds in the Pd-catalyzed and ligand-enabled difunctionalization of alkenes.
Collapse
Affiliation(s)
- Balaji D Barve
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan, Republic of China. .,Department of Chemistry, National Taiwan Normal University, Taipei 10610, Taiwan, Republic of China
| | - Yao-Haur Kuo
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan, Republic of China.
| | - Wen-Tai Li
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan, Republic of China.
| |
Collapse
|
5
|
Zhang T, Yao W, Wan J, Liu Y. Transition‐Metal‐Free C(
sp
2
)‐H Dithiocarbamation and Chromone Annulation Cascade for 3‐Dithiocarbamyl Chromone Synthesis. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100617] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Tao Zhang
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang 330022 People's Republic of China
| | - Weijun Yao
- Department of Chemistry Zhejiang Sci-Tech University Hangzhou 310018 People's Republic of China
| | - Jie‐Ping Wan
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang 330022 People's Republic of China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang 330022 People's Republic of China
| |
Collapse
|
6
|
Cheng D, Xu X, Pu Y, Wang M, Shen Y, Shen J, Yan J. 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)-Mediated Tandem Oxidative-Coupling/Annulation of o-Hydroxyaryl Enaminones with Cycloheptatriene. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1705973] [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
AbstractA DDQ-mediated tandem reaction of easily available o-hydroxyaryl enaminones and cycloheptatriene is disclosed. It provides an effective and convenient method for the synthesis of 3-(cycloheptatrienyl)-substituted chromones in moderate to excellent yields with good functional group tolerance; this reaction involves an oxidative coupling and intramolecular annulation pathway.
Collapse
Affiliation(s)
- Dongping Cheng
- College of Pharmaceutical Science, Zhejiang University of Technology
| | - Xiaoliang Xu
- College of Chemical Engineering, Zhejiang University of Technology
| | - Yueqi Pu
- College of Pharmaceutical Science, Zhejiang University of Technology
| | - Mingliang Wang
- College of Pharmaceutical Science, Zhejiang University of Technology
| | - Yinqiang Shen
- College of Pharmaceutical Science, Zhejiang University of Technology
| | - Jing Shen
- College of Pharmaceutical Science, Zhejiang University of Technology
| | - Jizhong Yan
- College of Pharmaceutical Science, Zhejiang University of Technology
| |
Collapse
|
7
|
Wang Y, Hu B, Zhang Q, Zhao S, Zhao Y, Zhang B, Yu F. Selectfluor-triggered fluorination/cyclization of o-hydroxyarylenaminones: A facile access to 3-fluoro-chromones. JOURNAL OF CHEMICAL RESEARCH 2020. [DOI: 10.1177/1747519820923084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A fast and efficient Selectfluor-triggered fluorination/cyclization reaction of o-hydroxyarylenaminones has been successfully developed. The reaction successfully provides an expedient method for the synthesis of 3-fluoro-chromones promoted by potassium carbonate, which shows readily available starting materials and is easy to operate. In addition, a plausible mechanism of this tandem cyclization reaction was proposed where 4 H-chromen-4-one, 2-(dimethylamino)-3,3-difluorochroman-4-one, and 3,3-difluoro-2-hydroxychroman-4-one were not found to be the reactive intermediates. Moreover, these novel compounds have been obtained in moderate to good yields, and their structures have been confirmed by 1H NMR, 13C NMR, and high-resolution mass spectrometry.
Collapse
Affiliation(s)
- Yanqin Wang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, P.R. China
| | - Biao Hu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, P.R. China
| | - Qiaohe Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, P.R. China
| | - Siyun Zhao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, P.R. China
| | - Yuxuan Zhao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, P.R. China
| | - Biao Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, P.R. China
| | - Fuchao Yu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, P.R. China
| |
Collapse
|
8
|
Mkrtchyan S, Iaroshenko VO. Photoredox Functionalization of 3-Halogenchromones, 3-Formylchromones, and Chromone-3-carboxylic Acids: Routes to 3-Acylchromones. J Org Chem 2020; 85:7152-7174. [DOI: 10.1021/acs.joc.0c00537] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Satenik Mkrtchyan
- Laboratory of Homogeneous Catalysis and Molecular Design at the Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90-363 Łodź, Poland
| | - Viktor O. Iaroshenko
- Laboratory of Homogeneous Catalysis and Molecular Design at the Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, PL-90-363 Łodź, Poland
| |
Collapse
|
9
|
Affiliation(s)
- Jungeun Lee
- College of PharmacyGachon University (21936) 191 Hambakmoero, Yeonsu-gu Incheon Republic of Korea
| | - Sangil Kwon
- College of PharmacyGachon University (21936) 191 Hambakmoero, Yeonsu-gu Incheon Republic of Korea
| | - Seung‐Yong Seo
- College of PharmacyGachon University (21936) 191 Hambakmoero, Yeonsu-gu Incheon Republic of Korea
| |
Collapse
|
10
|
Luo T, Wan JP, Liu Y. Toward C2-nitrogenated chromones by copper-catalyzed β-C(sp2)–H N-heteroarylation of enaminones. Org Chem Front 2020. [DOI: 10.1039/d0qo00065e] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The synthesis of C2-nitrogenated chromones has been performed via reactions of enaminones and nitrogen nucleophiles based on an unconventional β-C–H bond functionalization and a featured chromone annulation of enaminones.
Collapse
Affiliation(s)
- Tian Luo
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang 330022
- P. R. China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang 330022
- P. R. China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang 330022
- P. R. China
| |
Collapse
|
11
|
Yu Q, Liu Y, Wan JP. Transition metal-free synthesis of 3-trifluoromethyl chromones via tandem C–H trifluoromethylation and chromone annulation of enaminones. Org Chem Front 2020. [DOI: 10.1039/d0qo00855a] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The synthesis of 3-trifluoromethyl chromones has been realized via transition metal-free reactions of o-hydroxyphenyl enaminones and the Langlois reagent via cascade C–H trifluoromethylation and chromone annulation.
Collapse
Affiliation(s)
- Qing Yu
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang 330022
- P. R. China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang 330022
- P. R. China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang 330022
- P. R. China
| |
Collapse
|
12
|
Liang YE, Lu CL, Li WT. Pd-Catalyzed sequential hydroarylation and olefination reactions of 3-allylchromones. Org Biomol Chem 2019; 17:7569-7583. [PMID: 31384851 DOI: 10.1039/c9ob01147a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, a novel approach to regioselective α- or γ-hydroarylation of 3-allylchromones with electron-rich arenes has been presented. Results of this study indicated that the regioselectivity was dependent on the substituent at the γ-position of the allyl group. Hydrogen or alkyl substitution favored α-hydroarylation, whereas aryl substitution favored γ-hydroarylation. This methodology provides an efficient means to achieve the α- or γ-selective hydroarylation of 3-allylchromones. Application of α-hydroarylation to perform Pd-catalyzed one-pot sequential α-hydroarylation and π-chelation-assisted olefination has also been reported.
Collapse
Affiliation(s)
- Yi-En Liang
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan, Republic of China.
| | - Chia-Ling Lu
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan, Republic of China.
| | - Wen-Tai Li
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan, Republic of China.
| |
Collapse
|
13
|
Cheng D, Wang M, Deng Z, Yan X, Xu X, Yan J. 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone Mediated Tandem Oxidative-Coupling/Annulation of Enaminones with 1,3-Diarylpropenes for the Synthesis of 3-Allylchromones. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900793] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Dongping Cheng
- College of Pharmaceutical Science; Zhejiang University of Technology; 18 Chaowang Road 310014 Hangzhou Zhejiang P. R. China
| | - Mingliang Wang
- College of Pharmaceutical Science; Zhejiang University of Technology; 18 Chaowang Road 310014 Hangzhou Zhejiang P. R. China
| | - Zhiteng Deng
- College of Pharmaceutical Science; Zhejiang University of Technology; 18 Chaowang Road 310014 Hangzhou Zhejiang P. R. China
| | - Xianhang Yan
- College of Pharmaceutical Science; Zhejiang University of Technology; 18 Chaowang Road 310014 Hangzhou Zhejiang P. R. China
| | - Xiaoliang Xu
- College of Chemical Engineering; Zhejiang University of Technology; 18 Chaowang Road 310014 Hangzhou Zhejiang P. R. China
| | - Jizhong Yan
- College of Pharmaceutical Science; Zhejiang University of Technology; 18 Chaowang Road 310014 Hangzhou Zhejiang P. R. China
| |
Collapse
|
14
|
Mrug GP, Myshko NV, Bondarenko SP, Sviripa VM, Frasinyuk MS. One-Pot Synthesis of B-Ring Ortho-Hydroxylated Sappanin-Type Homoisoflavonoids. J Org Chem 2019; 84:7138-7147. [DOI: 10.1021/acs.joc.9b00814] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Galyna P. Mrug
- Department of Chemistry of Bioactive Nitrogen-Containing Heterocyclic Bases, V. P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, Kyiv 02094, Ukraine
| | - Nataliia V. Myshko
- Institute of High Technologies, Taras Shevchenko Kyiv National University, Kyiv 03022, Ukraine
| | - Svitlana P. Bondarenko
- Department of Food Chemistry, National University of Food Technologies, Kyiv 01601, Ukraine
| | | | - Mykhaylo S. Frasinyuk
- Department of Chemistry of Bioactive Nitrogen-Containing Heterocyclic Bases, V. P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, Kyiv 02094, Ukraine
| |
Collapse
|
15
|
Fu L, Wan J. C3‐Functionalized Chromones Synthesis by Tandem C−H Elaboration and Chromone Annulation of Enaminones. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900196] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Leiqing Fu
- College of Chemistry and Chemical EngineeringJiangxi Normal University Nanchang 330022 P. R. China
| | - Jie‐Ping Wan
- College of Chemistry and Chemical EngineeringJiangxi Normal University Nanchang 330022 P. R. China
| |
Collapse
|
16
|
Abegaz BM, Kinfe HH. Naturally Occurring Homoisoflavonoids: Phytochemistry, Biological Activities, and Synthesis (Part II). Nat Prod Commun 2019. [DOI: 10.1177/1934578x19845813] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
This review documents all the new homoisoflavonoids (HIFs) that have been reported since 2007, whose total number has grown from 159 in 2007 to 295 at the present time. This review contains their structures, biological sources, plant parts they are obtained from, and, if reported, their optical rotations and melting points. The same classification is followed as an earlier review to ease reference to both reviews. This review takes note of the recent revision of plant families that were known to contain HIFs that have now been merged into one big family, Asparagaceae. Homoisoflavonoids also occur in Fabaceae and others. Two taxa, Ophiopogoan japonicus (Asparagaceae) and Caesalpinia sappan (Fabaceae), have been the source of many HIFs. These are briefly summarized. The biological properties of HIFs are also reviewed under the topics such as antioxidant, anti-inflammatory, antimicrobial, antidiabetic, and cytotoxic. The review also surveys the total synthesis of natural HIFs. All new compounds are classified and tabulated following the same style as the previous review. Dedicated to Professor Andrew Paul Krapcho on the occasion of his 87th Birthday.
Collapse
Affiliation(s)
- Berhanu M Abegaz
- Stellenbosch Institute for Advanced Study, Wallenberg Research Centre at Stellenbosch University, South Africa
- Department of Chemistry, Center of Synthesis and Catalysis, University of Johannesburg, South Africa
| | - Henok H Kinfe
- Department of Chemistry, Center of Synthesis and Catalysis, University of Johannesburg, South Africa
| |
Collapse
|
17
|
Mkrtchyan S, Iaroshenko VO. New Entries to 3-Acylchromones: TM-Catalysed Decarboxylative Cross-Coupling of α-Keto Acids with ortho
-Hydroxyarylenaminones, 2,3-Unsubstituted Chromones and 3-Iodochromones. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801231] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Satenik Mkrtchyan
- Laboratory of Homogeneous Catalysis and Molecular Design at the Centre of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112, PL -90-363 Łodź Poland
| | - Viktor O. Iaroshenko
- Laboratory of Homogeneous Catalysis and Molecular Design at the Centre of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112, PL -90-363 Łodź Poland
| |
Collapse
|
18
|
Annamalai P, Hsu KC, Raju S, Hsiao HC, Chou CW, Lin GY, Hsieh CM, Chen PL, Liu YH, Chuang SC. Palladium(II)-Catalyzed Mono- and Bis-alkenylation of N-Acetyl-2-aminobiaryls through Regioselective C-H Bond Activation. J Org Chem 2018. [PMID: 29521504 DOI: 10.1021/acs.joc.8b00194] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We developed palladium-catalyzed oxidative coupling of olefins with N-acyl 2-aminobiaryls through a sequence of ortho C-H bond activation/alkene insertion/reductive elimination. Furthermore, we controlled the selectivity of mono- and bis-alkenylation products with the solvent effect. The developed protocol was promising for a broad substrate scope ranging from activated olefins with a wide variety of functional groups to unactivated olefins.
Collapse
Affiliation(s)
| | - Kou-Chi Hsu
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30013 , Taiwan
| | - Selvam Raju
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30013 , Taiwan
| | - Huan-Chang Hsiao
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30013 , Taiwan
| | - Chih-Wei Chou
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30013 , Taiwan
| | - Gu-Ying Lin
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30013 , Taiwan
| | - Cheng-Ming Hsieh
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30013 , Taiwan
| | - Pei-Ling Chen
- Department of Chemistry , National Tsing Hua University , Hsinchu , Taiwan 30013
| | - Yi-Hung Liu
- Instrumentation Center , National Taiwan University , Taipei , Taiwan 30010
| | - Shih-Ching Chuang
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30013 , Taiwan
| |
Collapse
|