1
|
Singh G, Marupalli SS, Arockiaraj M, Rajeshkumar V. I 2-Cs 2CO 3 Mediated Intramolecular C2-Amination and Oxidative Rearrangement Cascade of C-3 Phenylthio Indoles: A Route to Synthesize Thiosulfonate-Embedded 2-Iminoindolin-3-ones. J Org Chem 2024; 89:5861-5870. [PMID: 38552213 DOI: 10.1021/acs.joc.4c00056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
An efficient, transition-metal-free protocol employing I2/Cs2CO3 for the synthesis of thiosulfonate containing 2-iminoindolin-3-ones motifs has been developed from C-3 phenylthio indoles. The reaction proceeded through intramolecular cyclization involving C-N bond formation, leading to the formation of indole-fused benzothiazines as a key intermediate. Remarkably, Cs2CO3 played a crucial role in the reaction as an oxygen source, enabling oxidative rearrangement with [1,4]-sulfonyl migration to furnish the final products with the formation of multiple functional groups such as C═O, C═N, and S-SO2.
Collapse
Affiliation(s)
- Gargi Singh
- Organic Synthesis & Catalysis Lab, Department of Chemistry, National Institute of Technology Warangal, Hanumakonda - 506004, Telangana, India
| | - Sasi Sree Marupalli
- Organic Synthesis & Catalysis Lab, Department of Chemistry, National Institute of Technology Warangal, Hanumakonda - 506004, Telangana, India
| | - Mariyaraj Arockiaraj
- Organic Synthesis & Catalysis Lab, Department of Chemistry, National Institute of Technology Warangal, Hanumakonda - 506004, Telangana, India
| | - Venkatachalam Rajeshkumar
- Organic Synthesis & Catalysis Lab, Department of Chemistry, National Institute of Technology Warangal, Hanumakonda - 506004, Telangana, India
| |
Collapse
|
2
|
Khatua A, Jana D, Nandy M, Shyamal P, Bisai A. Total Synthesis of (+)- and (-)-Calycanthine by Means of Thio-Urea-Catalyzed Sequential Michael Reactions of Bis-oxindoles. J Org Chem 2024; 89:4792-4801. [PMID: 38544463 DOI: 10.1021/acs.joc.4c00019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
A unified catalytic asymmetric approach to naturally occurring piperidinoindoline and pyrrololidinoindoline alkaloids has been realized via the development of a thio-urea-catalyzed sequential Michael addition of bis-oxindole onto nitroethylene (up to 93% ee and >20:1 dr). This strategy offers the total syntheses of either enantiomers of naturally occurring calycanthine.
Collapse
Affiliation(s)
- Arindam Khatua
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462 066, Madhya Pradesh, India
| | - Debgopal Jana
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Kalyani, Nadia 741 246, West Bengal, India
| | - Monosij Nandy
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Kalyani, Nadia 741 246, West Bengal, India
| | - Pranay Shyamal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Kalyani, Nadia 741 246, West Bengal, India
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462 066, Madhya Pradesh, India
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Kalyani, Nadia 741 246, West Bengal, India
| |
Collapse
|
3
|
Honda T, Ogata D, Tsurui M, Yoshida S, Sato S, Muraoka T, Kitagawa Y, Hasegawa Y, Yuasa J, Oguri H. Rapid Synthesis of Chiral Figure-Eight Macrocycles Using a Preorganized Natural Product-Based Scaffold. Angew Chem Int Ed Engl 2024; 63:e202318548. [PMID: 38169344 DOI: 10.1002/anie.202318548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 12/26/2023] [Accepted: 01/02/2024] [Indexed: 01/05/2024]
Abstract
Chiral D2 -symmetric figure-eight shaped macrocycles are promising scaffolds for amplifying the chiroptical properties of π-conjugated systems. By harnessing the inherent and adaptable conformational dynamics of a chiral C2 -symmetric bispyrrolidinoindoline (BPI) manifold, we developed an enantio-divergent modular synthetic platform to rapidly generate a diverse range of chiral macrocycles, spanning from 14- to 66-membered rings, eliminating the need for optical resolution. Notably, a 32-membered figure-eight macrocycle showed excellent circularly polarized luminescence (CPL: |glum |=1.1×10-2 ) complemented by a robust emission quantum yield (Φfl =0.74), to achieve outstanding CPL brightness (BCPL : ϵ×Φfl ×|glum |/2=480). Using quadruple Sonogashira couplings, this versatile synthetic platform enables precise adjustments of the angle, distance, and length among intersecting π-conjugated chromophores. Our synthetic strategy offers a streamlined and systematic approach to significantly enhance BCPL values for a variety of chiral D2 -symmetric figure-eight macrocycles.
Collapse
Affiliation(s)
- Tasuku Honda
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Daiji Ogata
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Makoto Tsurui
- Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Satoshi Yoshida
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, FS CREATION, Mitsui LINK Lab Kashiwanoha 1, 6-6-2, Kashiwa, Chiba 227-0882, Japan
| | - Sota Sato
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, FS CREATION, Mitsui LINK Lab Kashiwanoha 1, 6-6-2, Kashiwa, Chiba 227-0882, Japan
- Division of Advanced Molecular Science, Institute for Molecular Science (IMS), 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Takahiro Muraoka
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 183-8538, Japan
| | - Yuichi Kitagawa
- Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Yasuchika Hasegawa
- Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Junpei Yuasa
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Hiroki Oguri
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| |
Collapse
|
4
|
Wang L, Chen L, Qin Z, Ni K, Li X, Yu Z, Kuang Z, Qin X, Duan H, An J. Application of Iodine as a Catalyst in Aerobic Oxidations: A Sustainable Approach for Thiol Oxidations. Molecules 2023; 28:6789. [PMID: 37836632 PMCID: PMC10574728 DOI: 10.3390/molecules28196789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 09/19/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023] Open
Abstract
Iodine is a well-known oxidant that is widely used in organic syntheses. Thiol oxidation by stoichiometric iodine is one of the most commonly employed strategies for the synthesis of valuable disulfides. While recent advancements in catalytic aerobic oxidation conditions have eliminated the need for stoichiometric oxidants, concerns persist regarding the use of toxic or expensive catalysts. In this study, we discovered that iodine can be used as a cheap, low-toxicity catalyst in the aerobic oxidation of thiols. In the catalytic cycle, iodine can be regenerated via HI oxidation by O2 at 70 °C in EtOAc. This protocol harnesses sustainable oxygen as the terminal oxidant, enabling the conversion of primary and secondary thiols with remarkable efficiency. Notably, all 26 tested thiols, encompassing various sensitive functional groups, were successfully converted into their corresponding disulfides with yields ranging from >66% to 98% at a catalyst loading of 5 mol%.
Collapse
Affiliation(s)
- Lijun Wang
- Department of Chemistry and Innovation Center of Pesticide Research, College of Science, China Agricultural University, Beijing 100193, China; (L.W.); (X.L.); (Z.Y.); (Z.K.)
| | - Lingxia Chen
- Department of Nutrition and Health, China Agricultural University, Beijing 100083, China; (L.C.); (Z.Q.); (K.N.); (X.Q.)
| | - Zixuan Qin
- Department of Nutrition and Health, China Agricultural University, Beijing 100083, China; (L.C.); (Z.Q.); (K.N.); (X.Q.)
| | - Ke Ni
- Department of Nutrition and Health, China Agricultural University, Beijing 100083, China; (L.C.); (Z.Q.); (K.N.); (X.Q.)
| | - Xiao Li
- Department of Chemistry and Innovation Center of Pesticide Research, College of Science, China Agricultural University, Beijing 100193, China; (L.W.); (X.L.); (Z.Y.); (Z.K.)
| | - Zhiyuan Yu
- Department of Chemistry and Innovation Center of Pesticide Research, College of Science, China Agricultural University, Beijing 100193, China; (L.W.); (X.L.); (Z.Y.); (Z.K.)
| | - Zichen Kuang
- Department of Chemistry and Innovation Center of Pesticide Research, College of Science, China Agricultural University, Beijing 100193, China; (L.W.); (X.L.); (Z.Y.); (Z.K.)
| | - Xinshu Qin
- Department of Nutrition and Health, China Agricultural University, Beijing 100083, China; (L.C.); (Z.Q.); (K.N.); (X.Q.)
| | - Hongxia Duan
- Department of Chemistry and Innovation Center of Pesticide Research, College of Science, China Agricultural University, Beijing 100193, China; (L.W.); (X.L.); (Z.Y.); (Z.K.)
| | - Jie An
- Department of Nutrition and Health, China Agricultural University, Beijing 100083, China; (L.C.); (Z.Q.); (K.N.); (X.Q.)
| |
Collapse
|
5
|
Jia X, Tian X, Zhuang D, Wan Z, Gu J, Li Z. Copper-Catalyzed Intermolecular Cross-dehydrogenative C-N Coupling at Room Temperature via Remote Activating Group Enabled Radical Relay Strategy. Org Lett 2023; 25:2012-2017. [PMID: 36944029 DOI: 10.1021/acs.orglett.3c00267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Employing N-fluorobenzenesulfonimide (NFSI) as a nitrogen-centered radical (NCR) precursor, an intermolecular C(sp2)-N coupling on heteroarenes or substituted benzenes with remote activated aniline derivatives via copper catalyzed N-N radical relay strategy at room temperature is developed. Good to excellent yields are acquired, and no ligand or additive is required. Reaction scope investigation and preliminary mechanistic studies demonstrate that the remote activating strategy and delicate control on the reactivities of active NCR species are essential to guarantee satisfactory chemo- and site-selectivity.
Collapse
Affiliation(s)
- Xiaoqi Jia
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Xiangmin Tian
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Dailin Zhuang
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Zhenyang Wan
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Jiahao Gu
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Ziyuan Li
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| |
Collapse
|
6
|
Yang Y, Zhou Y, Jiang Q, Tan Y, Wu W, Han K, Zhu R, Zheng S. Synthesis and Structure–Activity Analysis of Novel Potential Antifungal Cyclotryptamine Alkaloid Derivatives. Molecules 2023; 28:molecules28062617. [PMID: 36985588 PMCID: PMC10053776 DOI: 10.3390/molecules28062617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/28/2023] [Accepted: 03/07/2023] [Indexed: 03/15/2023] Open
Abstract
A total of 39 novel cyclotryptamine alkaloid derivatives were prepared from 2-(1H-indol-3-yl) acetonitrile. The prepared compounds were evaluated against six plant pathogen fungi. Bioassay results revealed that most of the compounds displayed higher in vitro antifungal activities than the positive control. Notably, compound b2 displayed the broadest and most effective activity among the tested cyclotryptamine alkaloid derivatives and might be a novel potential leading compound for further development as an antifungal agent.
Collapse
|
7
|
Kumar R, Khanna Y, Kaushik P, Kamal R, Khokhar S. Recent Advancements on Metal-Free Vicinal Diamination of Alkenes: Synthetic Strategies and Mechanistic Insights. Chem Asian J 2023; 18:e202300017. [PMID: 36869415 DOI: 10.1002/asia.202300017] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/25/2023] [Accepted: 03/03/2023] [Indexed: 03/05/2023]
Abstract
The oxidative aminative vicinal difunctionalization of alkenes or related chemical feedstocks has emerged as sustainable and multipurpose strategies that can efficiently construct two -N bonds, and simultaneously prepare the synthetically fascinating molecules and catalysis in organic synthesis that typically required multi-step reactions. This review summarized the impressive breakthroughs on synthetic methodologies (2015-2022) documented especially over inter/intra-molecular vicinal diamination of alkenes with electron-rich or deficient diverse nitrogen sources. These unprecedented strategies predominantly involved iodine-based reagents/catalysts, which resent the interest of organic chemists due to their impressive role as flexible, non-toxic, and environmentally friendly reagents, resulting in a wide variety of synthetically useful organic molecules. Moreover, the information collected also describes the significant role of catalyst, terminal oxidant, substrate scope, synthetic applications, and their unsuccessful results to highlight the limitations. Special emphasis has been given to proposed mechanistic pathways to determine the key factors governing the issues of regioselectivity, enantioselectivity, and diastereoselectivity ratios.
Collapse
Affiliation(s)
- Ravinder Kumar
- Department of Chemistry, MMEC, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, 133207, Haryana (INDIA
| | - Yugam Khanna
- Department of Chemistry, MMEC, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, 133207, Haryana (INDIA
| | - Parul Kaushik
- Department of Chemistry, MMEC, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, 133207, Haryana (INDIA
| | - Raj Kamal
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136119, Haryana, INDIA
| | - Shiwani Khokhar
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136119, Haryana, INDIA
| |
Collapse
|
8
|
Chen J, Zhang R, Ma C, Zhang P, Zhang Y, Wang B, Xue F, Jin W, Xia Y, Liu C. Sustainable electrochemical dearomatization for the synthesis of diverse 2, 3-functionalized indolines. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
9
|
Chen J, Yang Y, Zhou Y, Wei Y, Zhu R, Zheng S. Synthesis and Antifungal Activity of Chimonanthus praecox Derivatives. Molecules 2022; 27:molecules27175570. [PMID: 36080337 PMCID: PMC9457717 DOI: 10.3390/molecules27175570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 06/02/2022] [Accepted: 06/06/2022] [Indexed: 11/16/2022] Open
Abstract
To search for efficient agricultural antifungal lead compounds, 39 Chimonanthus praecox derivatives were designed, synthesized, and evaluated for their antifungal activities. The structures of target compounds were fully characterized by 1H NMR, 13C NMR, and MS spectra. The preliminary bioassays revealed that some compounds exhibited excellent antifungal activities in vitro. For example, the minimum inhibitory concentration (MIC) of compound b15 against Phytophthora infestans was 1.95 µg mL−1, and the minimum inhibitory concentration (MIC) of compound b17 against Sclerotinia sclerotiorum was 1.95 µg mL−1. Therefore, compounds b15 and b17 were identified as the most promising candidates for further study.
Collapse
|
10
|
Wang W, Jiang SY, Song JR, Wu W, Shi J, Li ZY, Wu YA, Chi Q, Pan WD, Ren H. Copper-Catalyzed Selective Oxidative Cross-Coupling of Tryptophols and Tryptamines To Access Heterocyclic 3a,3a'-Bisindolines. Org Lett 2022; 24:2716-2721. [PMID: 35388699 DOI: 10.1021/acs.orglett.2c00821] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The first example of cyclization cross-coupling of tryptophols and tryptamines has been realized by copper catalysis with air or oxone as the terminal oxidant, resulting in the direct construction of a new class of heterocyclic 3a,3a'-bisindolines in moderate to good yields with high chemoselectivities. A series of mechanistic control experiments were also conducted, indicating that the copper catalyst selectively coordinates with the nitrogen moiety of the tryptamine to initiate the oxidation, and a nucleophilic-alkylation process is proposed for the carbon-carbon bond-forming in the reaction. The novel synthetic strategies and molecular skeletons outlined in this work provide new ideas and concepts for the design of other useful reaction and potential drugs.
Collapse
Affiliation(s)
- Wei Wang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550031, China.,Guizhou University, Huaxi Avenue South, Guiyang 550025, China
| | - Shu-Yun Jiang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550031, China
| | - Jun-Rong Song
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550031, China
| | - Wei Wu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550031, China
| | - Jun Shi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550031, China
| | - Zhi-Yao Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550031, China
| | - Ying-Ai Wu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550031, China
| | - Qin Chi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550031, China
| | - Wei-Dong Pan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550031, China.,Guizhou University, Huaxi Avenue South, Guiyang 550025, China
| | - Hai Ren
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550031, China
| |
Collapse
|
11
|
Khatua A, Shyamal P, Pal S, Mondal A, Bisai A. Concise total syntheses of bis(cyclotryptamine) alkaloids via thio-urea catalyzed one-pot sequential Michael addition. Chem Commun (Camb) 2022; 58:3929-3932. [PMID: 35244129 DOI: 10.1039/d2cc01008a] [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
Naturally occurring bis(cyclotryptamine) alkaloids feature vicinal all-carbon quaternary stereocenters with an elongated labile C-3a-C-3a' Sigma bond with impressive biological activities. In this report, we have developed a thio-urea catalyzed one-pot sequential Michael addition of bis-oxindole onto selenone to access enantioenriched dimeric 2-oxindoles with vicinal quaternary stereogenic centers at the pseudobenzylic position (up to 96% ee and >20 : 1 dr). This strategy has been successfully applied for the total syntheses of either enantiomers of chimonanthine, folicanthine, and calycanthine.
Collapse
Affiliation(s)
- Arindam Khatua
- Department of Chemistry, IISER Bhopal, Bhopal Bypass Road, Bhopal - 462 066, Madhya Pradesh, India.
| | - Pranay Shyamal
- Department of Chemistry, IISER Kolkata, Mohanpur Campus, Kalyani, Nadia - 741 246, West Bengal, India
| | - Souvik Pal
- Department of Chemistry, IISER Bhopal, Bhopal Bypass Road, Bhopal - 462 066, Madhya Pradesh, India.
| | - Ayan Mondal
- Department of Chemistry, IISER Kolkata, Mohanpur Campus, Kalyani, Nadia - 741 246, West Bengal, India
| | - Alakesh Bisai
- Department of Chemistry, IISER Bhopal, Bhopal Bypass Road, Bhopal - 462 066, Madhya Pradesh, India. .,Department of Chemistry, IISER Kolkata, Mohanpur Campus, Kalyani, Nadia - 741 246, West Bengal, India
| |
Collapse
|
12
|
Ma Z, Zhou A, Xia C. Strategies for total synthesis of bispyrrolidinoindoline alkaloids. Nat Prod Rep 2022; 39:1015-1044. [PMID: 35297915 DOI: 10.1039/d1np00060h] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Covering up to 2021Complex cyclotryptamine alkaloids with a bispyrrolidino[2,3-b]indoline (BPI) skeleton are an intriguing family of natural products, exhibiting wide systematic occurrences, large structural diversity, and multiple biological activities. Based on their structural characteristics, BPI alkaloids can be classified into chimonanthine-type BPI alkaloids, BPI diketopiperazines, and BPI epipolythiodiketopiperazines. These intricate molecules have captivated great attention soon after their isolation and identification in the 1960s. Due to the structural complexity, the total synthesis of these cyclotryptamine alkaloids is challenging. Nevertheless, remarkable progress has been achieved in the last six decades; in particular, several methods have been successfully established for the construction of vicinal all-carbon quaternary stereocenters. In this review, the structural diversity and chemical synthesis of these BPI alkaloids were summarized. BPI alkaloids are mainly synthesized by the methods of oxidative dimerization, reductive dimerization, and alkylation of bisoxindole. The purpose of this review is to present overall strategies for assembling the BPI skeleton and efforts towards controlling the stereocenters.
Collapse
Affiliation(s)
- Zhixian Ma
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, and Yunnan University Library, Yunnan University, Kunming 650091, China.
| | - Ankun Zhou
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, and Yunnan University Library, Yunnan University, Kunming 650091, China.
| | - Chengfeng Xia
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, and Yunnan University Library, Yunnan University, Kunming 650091, China.
| |
Collapse
|
13
|
Sunke R, Ahmed Khan S, Kumara Swamy KC. Pd-catalysed intramolecular transformations of indolylbenzenesulfonamides: ortho-sulfonamido-bi(hetero)aryls via C2-arylation and polycyclic sultams via C3 arylation. Org Biomol Chem 2022; 20:9148-9160. [DOI: 10.1039/d2ob01610a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Indolyl substituted iodo-sulfonamides deliver 2-aryl(sulfonamido)indoles in the presence of Pd(OAc)2/Ph3P/Et3N; the same reactants, using Pd(OAc)2/Ph3P/K2CO3, afford indole-fused sultams.
Collapse
Affiliation(s)
- Rajnikanth Sunke
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India
| | - Shabbir Ahmed Khan
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India
| | - K. C. Kumara Swamy
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India
| |
Collapse
|
14
|
Corrieri M, De Crescentini L, Mantellini F, Mari G, Santeusanio S, Favi G. Synthesis of Azacarbolines via PhIO 2-Promoted Intramolecular Oxidative Cyclization of α-Indolylhydrazones. J Org Chem 2021; 86:17918-17929. [PMID: 34871002 PMCID: PMC8689645 DOI: 10.1021/acs.joc.1c02217] [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] [Indexed: 11/30/2022]
Abstract
![]()
An unprecedented
synthesis of polysubstituted indole-fused pyridazines
(azacarbolines) from α-indolylhydrazones under oxidative conditions
using a combination of iodylbenzene (PhIO2) and trifluoroacetic
acid (TFA) has been developed. This transformation is conducted without
the need for transition metals, harsh conditions, or an inert atmosphere.
Collapse
Affiliation(s)
- Matteo Corrieri
- Department of Biomolecular Sciences, Section of Chemistry and Pharmaceutical Technologies, University of Urbino "Carlo Bo", Via I Maggetti 24, 61029 Urbino, Italy
| | - Lucia De Crescentini
- Department of Biomolecular Sciences, Section of Chemistry and Pharmaceutical Technologies, University of Urbino "Carlo Bo", Via I Maggetti 24, 61029 Urbino, Italy
| | - Fabio Mantellini
- Department of Biomolecular Sciences, Section of Chemistry and Pharmaceutical Technologies, University of Urbino "Carlo Bo", Via I Maggetti 24, 61029 Urbino, Italy
| | - Giacomo Mari
- Department of Biomolecular Sciences, Section of Chemistry and Pharmaceutical Technologies, University of Urbino "Carlo Bo", Via I Maggetti 24, 61029 Urbino, Italy
| | - Stefania Santeusanio
- Department of Biomolecular Sciences, Section of Chemistry and Pharmaceutical Technologies, University of Urbino "Carlo Bo", Via I Maggetti 24, 61029 Urbino, Italy
| | - Gianfranco Favi
- Department of Biomolecular Sciences, Section of Chemistry and Pharmaceutical Technologies, University of Urbino "Carlo Bo", Via I Maggetti 24, 61029 Urbino, Italy
| |
Collapse
|
15
|
Bai L, Ma Y, Jiang X. Total Synthesis of (-)-Calycanthine via Iron-Catalyzed Stereoselective Oxidative Dimerization. J Am Chem Soc 2021; 143:20609-20615. [PMID: 34871491 DOI: 10.1021/jacs.1c10498] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dimeric cyclotryptamine alkaloids typically feature vicinal all-carbon quaternary stereocenters and four nitrogen atoms. In comparison with the actual biosynthetic tryptophan derivatives, we designed the 2N-featured monomer 7, aiming to construct vicinal all-carbon quaternary stereocenters via a one-step dimerization process to access the 4N-featured isomeric members of this family. In this work, we disclose the first synthetic route to access the skeleton of (-)-isocalycanthine, featuring an iron-catalyzed oxidative dimerization reaction in a catalytic single-step operation with an overwhelming control of the absolute and relative stereochemistry. This strategy has been successfully applied to the total synthesis of (-)-calycanthine and 16 isocalycanthine derivatives, which demonstrates a new synthetic pathway for dimeric cyclotryptamine alkaloids.
Collapse
Affiliation(s)
- Leiyang Bai
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, People's Republic of China
| | - Yinhao Ma
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, People's Republic of China
| | - Xuefeng Jiang
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, People's Republic of China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China.,State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| |
Collapse
|
16
|
Li ZY, Wang W, Song JR, Wang RA, Shi J, Chi Q, Li Y, Ren H, Pan WD. Copper-Catalyzed Cyclization/Dimerization of Tryptamines with O 2/Air as the Sole Oxidant: Direct Access to Complex Bispyrrolidino[2,3- b]indoline. J Org Chem 2021; 86:17164-17172. [PMID: 34709032 DOI: 10.1021/acs.joc.1c02277] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The first transition metal catalytic one-step synthesis of the 3a, 3a'-bispyrrolidino [2,3-b] indoline scaffold via tandem cyclization/dimerization of tryptamines has been realized with the environmentally friendly O2/air as the sole oxidant. Different from the traditional direct oxidation of indole "N-H" group by excess amount of metal salts, a copper-catalyzed oxidative cyclization reaction is developed for the formation of the radical pyrrolidinoindoline intermediate in the current strategy. The robustness and practicality of this methodology is demonstrated by the step-economic, divergent total synthesis of natural products (±)-folicanthine and meso-folicanthine.
Collapse
Affiliation(s)
- Zhi-Yao Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, The Key laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550014, China
| | - Wei Wang
- Guizhou University, Huaxi Avenue South, Guiyang 550014, China
| | - Jun-Rong Song
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, The Key laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550014, China
| | - Rui-An Wang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, The Key laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550014, China
| | - Jun Shi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, The Key laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550014, China
| | - Qin Chi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, The Key laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550014, China
| | - Yan Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, The Key laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550014, China
| | - Hai Ren
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, The Key laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550014, China
| | - Wei-Dong Pan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, The Key laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Science, Guiyang 550014, China.,Guizhou University, Huaxi Avenue South, Guiyang 550014, China
| |
Collapse
|
17
|
|
18
|
Heravi MM, Abedian‐Dehaghani N, Zadsirjan V, Rangraz Y. Catalytic Function of Cu (I) and Cu (II) in Total Synthesis of Alkaloids. ChemistrySelect 2021. [DOI: 10.1002/slct.202101130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Majid M. Heravi
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
| | - Neda Abedian‐Dehaghani
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
| | - Vahideh Zadsirjan
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
| | - Yalda Rangraz
- Department of Chemistry School of Physics and Chemistry Alzahra University, PO.Box 1993891176, Vanak Tehran Iran
| |
Collapse
|
19
|
Zhu R, Wei Y, Han K, Shi XW, Gu YD, Bai HJ, Zheng SJ. Synthesis and biological profiling of half-calycanthaceous alkaloid analogues. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2021; 23:859-865. [PMID: 32686494 DOI: 10.1080/10286020.2020.1791100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 06/23/2020] [Accepted: 06/27/2020] [Indexed: 06/11/2023]
Abstract
During our continuous efforts to pursue antifungal agents, some calycanthaceous alkaloid analogs showed diverse and promising bioactivities. Therefore, 34 new calycanthaceous alkaloid derivatives were further prepared and screened for bioactivities. As a result of the evaluation against a great deal of plant pathogen fungi, bacteria and human pathogenic fungi, a majority of them displayed potent bioactivity. In particular, compound b6 displayed remarkably activity and might be novel potential leading compound for further development of antifungal agent. The relationship between structure and biological activity was also discussed.
Collapse
Affiliation(s)
- Rui Zhu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Yang Wei
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Ke Han
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Xin-Wei Shi
- Engineering Center of Qinling Mountains Natural Products, Shaanxi Academy of Sciences, Institute of Botany of Shaanxi Province, Xi'an 710061, China
| | - Yong-Dong Gu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Hong-Jin Bai
- Key Laboratory of Protection & Utilization of Biological Resources in Tarim Basin of Xinjiang Production and Construction Corps/College of Life Sciences, Tarim University, Alar 843300, China
| | - Shao-Jun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| |
Collapse
|
20
|
Zhu R, Yang C, Han K, Gu Y, Zhang J, Zheng S, Bai H. Synthesis and Antimicrobial Activity of Calycanthaceous Derivatives. Nat Prod Commun 2021. [DOI: 10.1177/1934578x211032611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A series of calycanthaceous alkaloid analogs have been synthesized in excellent yields. All the target compounds were evaluated in vitro for biological activity against a broad range of plant pathogen fungi, bacteria and human pathogenic fungi, and some of the designed compounds exhibited potential activity in the primary assays. Notably, Compound b7 illustrated higher degrees of activity against Aspergillu sflavu than amphotericin B, with a minimal inhibitory concentration value of 15.63 µg·mL−1. Compound b7 displayed the most effective activity among the tested calycanthaceous analogs and might be a novel potential leading compound for further development of antifungal agent.
Collapse
Affiliation(s)
- Rui Zhu
- Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps/School of Chemistry and Chemical Engineering, Tarim University, Xinjiang, China
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Cheng Yang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Ke Han
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Yongdong Gu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Jiwen Zhang
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Shaanxi, China
| | - Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Hongjin Bai
- Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps/School of Chemistry and Chemical Engineering, Tarim University, Xinjiang, China
| |
Collapse
|
21
|
Liu Y, Xu H, Wu H. Synthesis of benzo[f]pyrido[1,2-a]indole-6,11-diones via the I2-promoted reactions of methyl ketones with pyridines and 1,4-naphthoquinone. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
22
|
Xie T, Sui QB, Qin LZ, Wen X, Sun H, Xu QL, Zhen L. Cu-Catalyzed Dimerization of Indole Derived Oxime Acetate for Synthesis of Biimidazo[1,2- a]indoles. J Org Chem 2021; 86:5518-5529. [PMID: 33779172 DOI: 10.1021/acs.joc.1c00010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A copper-mediated cyclization and dimerization of indole derived oxime acetate was developed to generate a series of biimidazo[1,2-a]indole scaffolds with two contiguous stereogenic quaternary carbons in one step.
Collapse
Affiliation(s)
- Tao Xie
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases and State Key Laboratory of Natural Medicines, Center of Drug Discovery, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Qi-Bang Sui
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases and State Key Laboratory of Natural Medicines, Center of Drug Discovery, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Lu-Zhe Qin
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases and State Key Laboratory of Natural Medicines, Center of Drug Discovery, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Xiaoan Wen
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases and State Key Laboratory of Natural Medicines, Center of Drug Discovery, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Hongbin Sun
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases and State Key Laboratory of Natural Medicines, Center of Drug Discovery, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Qing-Long Xu
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases and State Key Laboratory of Natural Medicines, Center of Drug Discovery, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Le Zhen
- Key Laboratory of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| |
Collapse
|
23
|
Uyanik M, Tanaka H, Ishihara K. I
+
/TBHP Catalysis For Tandem Oxidative Cyclization To Indolo[2,3‐
b
]quinolines. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000570] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Muhammet Uyanik
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Hiroki Tanaka
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering Nagoya University Chikusa Nagoya 464-8603 Japan
| |
Collapse
|
24
|
Pardeshi VAS, Chundawat NS, Pathan SI, Sukhwal P, Chundawat TPS, Singh GP. A review on synthetic approaches of benzimidazoles. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1841239] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
| | | | | | - Priyal Sukhwal
- Department of Chemistry, Bhupal Nobles’ University, Udaipur, Rajasthan, India
| | | | - Girdhar Pal Singh
- Department of Chemistry, Bhupal Nobles’ University, Udaipur, Rajasthan, India
| |
Collapse
|
25
|
Zheng W, Tan M, Yang L, Zhou L, Zeng Q. I2
-Catalyzed N-Sulfonylation of Sulfoximines with Sulfinates in Water at Room Temperature. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000120] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Wenting Zheng
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection; College of Materials, Chemistry & Chemical Engineering; Chengdu University of Technology; 610059 Chengdu China
| | - Mingchao Tan
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection; College of Materials, Chemistry & Chemical Engineering; Chengdu University of Technology; 610059 Chengdu China
| | - Lu Yang
- Department of Chemistry; Graduate School of Science; Tohoku University; 980-8578 Sendai Japan
| | - Lihong Zhou
- College of Environment and Ecology; College of Materials, Chemistry & Chemical Engineering; Chengdu University of Technology; 610059 Chengdu China
| | - Qingle Zeng
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection; College of Materials, Chemistry & Chemical Engineering; Chengdu University of Technology; 610059 Chengdu China
| |
Collapse
|
26
|
Roy A, Maity A, Giri R, Bisai A. Efficient Alkynylation of 2‐Oxindoles with Alkynyl Dibenzothiophenium Triflates: Total Synthesis of (±)‐Deoxyeseroline. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Avishek Roy
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462 066 Madhya Pradesh India
| | - Arindam Maity
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462 066 Madhya Pradesh India
| | - Rahul Giri
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462 066 Madhya Pradesh India
| | - Alakesh Bisai
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462 066 Madhya Pradesh India
- Department of Chemical SciencesIndian Institute of Science Education and Research Kolkata Mohanpur, Haringhata Kalyani, Nadia 741 246 West Bengal India
| |
Collapse
|
27
|
Chen SK, Yang JS, Dai KL, Zhang FM, Zhang XM, Tu YQ. Exploration of a KI-catalyzed oxidation system for direct construction of bispyrrolidino[2,3-b]indolines and the total synthesis of (+)-WIN 64821. Chem Commun (Camb) 2020; 56:121-124. [DOI: 10.1039/c9cc08646c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A facile and environmentally benign KI(cat.)/NaBO3·4H2O oxidation system has been developed for the tandem oxidative aminocyclization/coupling of tryptamines, affording a series of 3a,3a′-bispyrrolidino[2,3-b]indolines with high efficiency (up to 94% yield).
Collapse
Affiliation(s)
- Si-Kai Chen
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Ju-Song Yang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Kun-Long Dai
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
- School of Chemistry and Chemical Engineering
| |
Collapse
|
28
|
Li Y, Guo J, Lu X, Zhong F. One-step assembly of alkoxypyrroloindolines via iodine-catalyzed alkoxycyclization of indole derivatives. Org Biomol Chem 2019; 18:32-35. [PMID: 31761916 DOI: 10.1039/c9ob02287b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we report an iodine-catalyzed alkoxycyclization of tryptamine derivatives under mild reaction conditions. This method distinguished itself by providing a catalytic, one-step assembly of diversely functionalized C3a-alkoxypyrroloindolines as well as dihydrofuran and lactone fused indolines. Mechanistic studies suggest that an ionic pathway is operative and this probably accounts for the diastereospecificity of all isolated cycloadducts.
Collapse
Affiliation(s)
- Yan Li
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu road, Wuhan 430074, China.
| | | | | | | |
Collapse
|
29
|
Zheng S, Zhu R, Zhou X, Chen L, Bai H, Zhang J. Synthesis and biological evaluation of calycanthaceous alkaloid analogs. Bioorg Med Chem 2019; 27:115088. [DOI: 10.1016/j.bmc.2019.115088] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 08/20/2019] [Accepted: 09/03/2019] [Indexed: 11/29/2022]
|
30
|
Zheng S, Zhu R, Tang B, Chen L, Bai H, Zhang J. Synthesis and biological evaluations of a series of calycanthaceous analogues as antifungal agents. Nat Prod Res 2019; 35:1816-1824. [PMID: 31378086 DOI: 10.1080/14786419.2019.1644635] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Starting from indole-3-acetonitrile, a total of 66 new calycanthaceous alkaloid analogues were synthesised in excellent yields. The prepared compounds were evaluated for their biological activities against a broad range of plant pathogen fungi. The results of bioassays indicated that the majority of tested compounds displayed comparable or better in vitro bioactivities than the positive control. Notably, Compound a1 displayed a significant activities against B. cereus, Escherichia sp and R. solanacearum, even better than the positive control streptomycin and Penicillin, with the same MIC value of 15.63 µg mL-1. Compound a1 displayed a broad spectrum and remarkably activities among the tested calycanthaceous analogues and might be a novel potential leading compound for further development of antifungal agents. The results obtained in the study will be very helpful for further design and structural optimisation of calycanthaceous alkaloids as potential agrochemical lead for plant disease control.
Collapse
Affiliation(s)
- Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China
| | - Rui Zhu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China
| | - Bing Tang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China
| | - Lizhuang Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China
| | - Hongjin Bai
- Key Laboratory of Protection & Utilization of Biological Resources in Tarim Basin of Xinjiang Production and Construction Corps/College of Life Sciences, Tarim University, Alar, Xinjiang, China
| | - Jiwen Zhang
- Key Laboratory of Botanical Pesticide R & D in Shaanxi Province, Yangling, Shaanxi, China
| |
Collapse
|
31
|
Shen X, Peng T, Zhou Y, Xi Y, Zhao J, Yang X, Zhang H. Progress in Total Syntheses of Dimeric Cyclotryptamine Alkaloids. CHINESE J ORG CHEM 2019. [DOI: 10.6023/cjoc201903058] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
32
|
Deka B, Baruah PK, Deb ML. Multi-component synthesis of 3-substituted indoles and their cyclisation to α-carbolines via I 2-promoted intramolecular C2 oxidative amination/aromatisation at room temperature. Org Biomol Chem 2018; 16:7806-7810. [PMID: 30328453 DOI: 10.1039/c8ob02362j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Condensation of indoles, aldehydes and pyrazol-5-amine in the presence of ceric ammonium nitrate gives 3-substituted indoles. These then cyclise to α-carbolines at room temperature through I2-promoted intramolecular C2 amination and aromatisation in open air. A plausible mechanism is proposed based on some controlled experiments.
Collapse
Affiliation(s)
- Bhaskar Deka
- Department of Applied Sciences, GUIST, Gauhati University, Guwahati-781014, Assam, India.
| | | | | |
Collapse
|
33
|
Panda S, Pradhan N, Manna D. Ring-Opening of Indoles: An Unconventional Route for the Transformation of Indoles to 1 H-Pyrazoles Using Lewis Acid. ACS COMBINATORIAL SCIENCE 2018; 20:573-578. [PMID: 30199224 DOI: 10.1021/acscombsci.8b00071] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
An unusual transformation of indoles to pyrazoles via an aromatic ring-opening strategy has been developed. The salient feature of this strategy involves the C2-N1 bond opening and concomitant cyclization reaction of the C2═C3 bond of the indole moiety with the tosylhydrazone, which proceeds under transition-metal and ligand free conditions. This ring-opening functionalization of indoles provides a wide scope of differently substituted pyrazoles.
Collapse
Affiliation(s)
- Subhankar Panda
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Nirmalya Pradhan
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Debasis Manna
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| |
Collapse
|
34
|
Naresh Babu K, Kariyandi NR, Saheeda M. K. S, Kinthada LK, Bisai A. Lewis Acid-Catalyzed Malonate Addition onto 3-Hydroxy-2-oxindoles: Mechanistic Consideration and Synthetic Approaches to the Pyrroloindoline Alkaloids. J Org Chem 2018; 83:12664-12682. [DOI: 10.1021/acs.joc.8b02017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K. Naresh Babu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh 462 066, India
| | - Nikhil Raj Kariyandi
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh 462 066, India
| | - Saina Saheeda M. K.
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh 462 066, India
| | - Lakshmana K. Kinthada
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh 462 066, India
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh 462 066, India
| |
Collapse
|
35
|
Sulfonylation of C(sp3)–H bond for synthesis of 2-sulfolmethyl azaarenes catalyzed by TBAI in water. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3573-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
36
|
Babu KN, Kinthada LK, Pratim Das P, Bisai A. Cu(ii)- tBu-PHOX catalyzed enantioselective malonate addition onto 3-hydroxy 2-oxindoles: application in the synthesis of dimeric pyrroloindoline alkaloids. Chem Commun (Camb) 2018; 54:7963-7966. [PMID: 29956704 DOI: 10.1039/c8cc04338h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient Cu(ii)-PHOX-catalyzed malonate addition onto 3-hydroxy 3-indolyl-2-oxindoles is envisioned to afford excellent enantioselectivities (up to >99% ee) in high chemical yields. Detailed characterization techniques including X-ray, NMR, CV and EPR experiments suggest that a Cu(ii)-complex is involved as an active species in this process. Applying this strategy, an advanced intermediate of cyclotryptamine alkaloids has been synthesized in few steps for a general approach to bis-cyclotryptamine alkaloids.
Collapse
Affiliation(s)
- K Naresh Babu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India.
| | | | | | | |
Collapse
|
37
|
Gupta A, Kumar J, Bhadra S. Chelation-assisted de-aryloxylative amination of 2-aryloxy quinolines: a new synthetic route to a key fragment of a bioactive PRMT5 inhibitor. Org Biomol Chem 2018; 16:3716-3720. [PMID: 29736546 DOI: 10.1039/c8ob00911b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A highly regioselective de-aryloxylative amination of O- or N-chelating group-functionalized 2-aryloxy quinolines has been accomplished by means of a copper catalyst. The chelating functional groups of the substrate play a crucial role in directing the C-2-selective amination process, which proceeds through a novel aromatic nucleophilic substitution of the aryloxy group. The methodology provides expedient access to an important class of functionalized 2-aminoquinolines (up to 88% isolated yield) and was successfully applied for the synthesis of a key fragment of an important bioactive PRMT5 inhibitor.
Collapse
Affiliation(s)
- Aniket Gupta
- Inorganic Materials and Catalysis Division, Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364002, Gujarat, India.
| | | | | |
Collapse
|
38
|
Wang Z, Zhao Q, Hou J, Yu W, Chang J. Iodine-mediated direct synthesis of multifunctional 2-aminobenzimidazoles from N-substituted o-diaminoarenes and isothiocyanates. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.03.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
39
|
Grenet E, Waser J. Iridium- and Rhodium-Catalyzed Directed C-H Heteroarylation of Benzaldehydes with Benziodoxolone Hypervalent Iodine Reagents. Org Lett 2018; 20:1473-1476. [PMID: 29466016 DOI: 10.1021/acs.orglett.8b00337] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The C-H heteroarylation of benzaldehydes with indoles and pyrroles was realized using the benziodoxolone hypervalent iodine reagents indole- and pyrroleBX. Functionalization of the aldehyde C-H bond using either an o-hydroxy or amino directing group and catalyzed by an iridium or a rhodium complex allowed the synthesis of salicyloylindoles and (2-sulfonamino)benzoylindoles, respectively, with good to excellent yields (74-98%). This new transformation could be carried out under mild conditions (rt to 40 °C) and tolerated a broad range of functionalities, such as ethers, halogens, carbonyls, or nitro groups.
Collapse
Affiliation(s)
- Erwann Grenet
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fedérale de Lausanne, EPFL SB ISIC LCSO , BCH 4306, 1015 Lausanne, Switzerland
| | - Jérôme Waser
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fedérale de Lausanne, EPFL SB ISIC LCSO , BCH 4306, 1015 Lausanne, Switzerland
| |
Collapse
|
40
|
|
41
|
Zhou Y, Li D, Tang S, Sun H, Huang J, Zhu Q. PhI(OAc)2-mediated dearomative C–N coupling: facile construction of the spiro[indoline-3,2′-pyrrolidine] skeleton. Org Biomol Chem 2018; 16:2039-2042. [DOI: 10.1039/c8ob00343b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A facile construction of the spiro[indole-3,2′-pyrrolidine] skeleton, through diacetoxyiodobenzene (PIDA) mediated C–N bond-forming dearomatization of C3 sulfonamide linked indole derivatives, has been developed.
Collapse
Affiliation(s)
- Yali Zhou
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
| | - Dengke Li
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
| | - Shi Tang
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
| | - Hongwei Sun
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
| | - Jinbo Huang
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
| | - Qiang Zhu
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
| |
Collapse
|
42
|
Dhineshkumar J, Gadde K, Prabhu KR. Substituent-Directed Regioselective Azidation: Copper-Catalyzed C–H Azidation and Iodine-Catalyzed Dearomatizative Azidation of Indole. J Org Chem 2017; 83:228-235. [DOI: 10.1021/acs.joc.7b02591] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jayaraman Dhineshkumar
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India
| | - Karthik Gadde
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India
| | - Kandikere Ramaiah Prabhu
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India
| |
Collapse
|
43
|
Sunkari S, Shaik SP, Krishna NH, Subba Rao AV, Kodiripaka BG, Alarifi A, Kamal A. Molecular Iodine-Promoted Transimination for the Synthesis of 6-Phenylpyrido[2′,1′:2,3]imidazo[4,5-c
]quinoline and 6-(Pyridin-2-yl)pyrido[2′,1′:2,3]imidazo[4,5-c
]quinolines. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700357] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Satish Sunkari
- Division of Medicinal Chemistry and Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
| | - Siddiq Pasha Shaik
- Division of Medicinal Chemistry and Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
| | - Namballa Hari Krishna
- Division of Medicinal Chemistry and Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research; Hyderabad 500036 India
| | - Ayanampudi Venkata Subba Rao
- Division of Medicinal Chemistry and Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
- Department of Pharmacology and Molecular Sciences; Johns Hopkins School of Medicine; 725 North Wolfe St. Baltimore Maryland 21205 United States
| | | | - Abdullah Alarifi
- Chemistry Department; College of Science; King Saud University; Riyadh 11451 Saudi Arabia
| | - Ahmed Kamal
- Division of Medicinal Chemistry and Biotechnology; CSIR-Indian Institute of Chemical Technology; Hyderabad 500007 India
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research; Hyderabad 500036 India
- Chemistry Department; College of Science; King Saud University; Riyadh 11451 Saudi Arabia
| |
Collapse
|
44
|
Wang X, Lei B, Ma L, Jiao H, Xing W, Chen J, Li Z. Iron-catalyzed C(5)−H Imidation of Azole with N
-Fluorobenzenesulfonimide. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701124] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaojiao Wang
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Bowen Lei
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Lifang Ma
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Huixuan Jiao
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Wenhua Xing
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Jiaming Chen
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| | - Ziyuan Li
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering; Sichuan University; Chengdu 610065 People's Republic of China
| |
Collapse
|
45
|
Kinthada LK, Medisetty SR, Parida A, Babu KN, Bisai A. FeCl3-Catalyzed Allylation Reactions onto 3-Hydroxy-2-oxindoles: Formal Total Syntheses of Bis-cyclotryptamine Alkaloids, (±)-Chimonanthine, and (±)-Folicanthine. J Org Chem 2017; 82:8548-8567. [DOI: 10.1021/acs.joc.7b01232] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lakshmana K. Kinthada
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh 462 066, India
| | - Sai Raghavendra Medisetty
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh 462 066, India
| | - Amarchand Parida
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh 462 066, India
| | - K. Naresh Babu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh 462 066, India
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, Madhya Pradesh 462 066, India
| |
Collapse
|
46
|
Yang ZY, Tian T, Du YF, Li SY, Chu CC, Chen LY, Li D, Liu JY, Wang B. Direct intramolecular amination of tryptophan esters to prepare pyrrolo[2,3-b]indoles. Chem Commun (Camb) 2017; 53:8050-8053. [PMID: 28671697 DOI: 10.1039/c7cc03983b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A metal-free iodine-catalyzed intramolecular amination has been developed for the practical synthesis of pyrrolo[2,3-b]indoles from readily available tryptophan esters. The transformation has been applied to a wide array of substrates and can be performed on gram scale under very mild conditions.
Collapse
Affiliation(s)
- Zhao-Ying Yang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Haihe Education Park, 38 Tongyan Road, Tianjin 300353, People's Republic of China.
| | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Zweig JE, Kim DE, Newhouse TR. Methods Utilizing First-Row Transition Metals in Natural Product Total Synthesis. Chem Rev 2017; 117:11680-11752. [PMID: 28525261 DOI: 10.1021/acs.chemrev.6b00833] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
First-row transition-metal-mediated reactions constitute an important and growing area of research due to the low cost, low toxicity, and exceptional synthetic versatility of these metals. Currently, there is considerable effort to replace existing precious-metal-catalyzed reactions with first-row analogs. More importantly, there are a plethora of unique transformations mediated by first-row metals, which have no classical second- or third-row counterpart. Herein, the application of first-row metal-mediated methods to the total synthesis of natural products is discussed. This Review is intended to highlight strategic uses of these metals to realize efficient syntheses and highlight the future potential of these reagents and catalysts in organic synthesis.
Collapse
Affiliation(s)
- Joshua E Zweig
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Daria E Kim
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R Newhouse
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| |
Collapse
|
48
|
Hu Z, Zhao T, Wang M, Wu J, Yu W, Chang J. I 2-Mediated Intramolecular C-H Amidation for the Synthesis of N-Substituted Benzimidazoles. J Org Chem 2017; 82:3152-3158. [PMID: 28233495 DOI: 10.1021/acs.joc.7b00142] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A practical intramolecular C-H amidation methodology has been developed using molecular iodine under basic conditions. The required imine substrates were readily obtained by condensation of simple o-phenylenediamine derivatives and aldehydes. The transition-metal-free cyclization reaction described here works well with crude imines and allows for the sequential synthesis of N-protected benzimidazoles without purification of the less stable condensation intermediates. This operationally simple synthetic approach is broadly applicable to a variety of aromatic, aliphatic, and cinnamic aldehydes to produce diverse 1,2-disubstituted benzimidazole derivatives in an efficient and scalable fashion.
Collapse
Affiliation(s)
- Zhiyuan Hu
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan Province 450001, People's Republic of China
| | - Ting Zhao
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan Province 450001, People's Republic of China
| | - Manman Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan Province 450001, People's Republic of China
| | - Jie Wu
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan Province 450001, People's Republic of China
| | - Wenquan Yu
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan Province 450001, People's Republic of China
| | - Junbiao Chang
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou, Henan Province 450001, People's Republic of China
| |
Collapse
|
49
|
Liang K, Xia C. Recent Advances of Transition Metal-Mediated Oxidative Radical Reactions in Total Synthesis of Indole Alkaloids. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201600777] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Kangjiang Liang
- Key Laboratory of Medicinal Chemistry for Natural Resources (Yunnan University); Ministry of Education, Yunnan University; Kunming Yunnan 650091 China
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany; Chinese Academy of Sciences; Kunming Yunnan 650201 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Chengfeng Xia
- Key Laboratory of Medicinal Chemistry for Natural Resources (Yunnan University); Ministry of Education, Yunnan University; Kunming Yunnan 650091 China
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany; Chinese Academy of Sciences; Kunming Yunnan 650201 China
| |
Collapse
|
50
|
Mani GS, Shaik SP, Tangella Y, Bale S, Godugu C, Kamal A. A facile I2-catalyzed synthesis of imidazo[1,2-a]pyridines via sp3 C–H functionalization of azaarenes and evaluation of anticancer activity. Org Biomol Chem 2017; 15:6780-6791. [DOI: 10.1039/c7ob01384a] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A three component synthetic protocol has been developed for the synthesis of medicinally important imidazo[1,2-a]pyridines via the iodine-catalyzed oxidative amination of benzylic C–H bonds of azaarenes. The synthesized compounds were evaluated for their anti-cancer activity.
Collapse
Affiliation(s)
- Geeta Sai Mani
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad-500 037
- India
- Medicinal Chemistry & Pharmacology
| | - Siddiq Pasha Shaik
- Medicinal Chemistry & Pharmacology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Yellaiah Tangella
- Medicinal Chemistry & Pharmacology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Swarna Bale
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad-500 037
- India
| | - Chandraiah Godugu
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad-500 037
- India
| | - Ahmed Kamal
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad-500 037
- India
- Medicinal Chemistry & Pharmacology
| |
Collapse
|