1
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Ahmad F, Ranga PK, Fatma S, Vijaya Anand R. Domino Approach to Heterocycles-Based Unsymmetrical Triarylmethanes through Heteroannulation of 2-(2-Enynyl)-pyridines with Enaminones. J Org Chem 2024. [PMID: 39137191 DOI: 10.1021/acs.joc.4c01006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
Herein, we report a copper-catalyzed protocol to access unsymmetrical triarylmethanes containing both indolizine and the chromone scaffolds in the same molecule via a 5-endo-dig cyclization of 2-(2-enynyl)-pyridines followed by reaction with 2-hydroxyaryl enaminones. A variety of 2-hydroxyaryl enaminones and 2-(2-enynyl)-pyridines were subjected to reaction under the optimal reaction conditions, and the respective triarylmethanes were obtained in good to excellent yields.
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Affiliation(s)
- Feroz Ahmad
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), Mohali, Sector 81, S.A.S. Nagar, Manauli (PO), Mohali 140306, Punjab, India
| | - Pavit K Ranga
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), Mohali, Sector 81, S.A.S. Nagar, Manauli (PO), Mohali 140306, Punjab, India
| | - Shaheen Fatma
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), Mohali, Sector 81, S.A.S. Nagar, Manauli (PO), Mohali 140306, Punjab, India
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), Mohali, Sector 81, S.A.S. Nagar, Manauli (PO), Mohali 140306, Punjab, India
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2
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Kumari A, Patanvadiya DJ, Jain A, Patra R, Paranjothy M, Rana NK. Pyridinium Ylide-Mediated Diastereoselective Synthesis of Spirocyclopropanyl-pyrazolones via Cascade Michael/Substitution Reaction. J Org Chem 2024. [PMID: 38742411 DOI: 10.1021/acs.joc.3c02879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
We have devised a highly diastereoselective formal [2 + 1] annulation reaction of arylidene/alkylidine-pyrazolones with in situ-generated supported as well as standard pyridinium ylides to construct spirocyclopropanyl-pyrazolones. The cascade approach exhibits a wide range of functional group tolerance, gram-scale capability, and substrate versatility. A diverse range of spirocyclic cyclopropanes was synthesized extensively with both mediators, and the supported pyridine was reused in subsequent cycles. Density functional theory calculations confirmed the formation of spirocyclopropane as the lower energy pathway.
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Affiliation(s)
- Akanksha Kumari
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342030, India
| | | | - Anshul Jain
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342030, India
| | - Ranjan Patra
- Amity Institute of Click Chemistry Research & Studies, Amity University, Noida, Uttar Pradesh 201303, India
| | - Manikandan Paranjothy
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342030, India
| | - Nirmal K Rana
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342030, India
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3
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Karjee P, Debnath B, Mandal S, Saha S, Punniyamurthy T. One-pot C-N/C-C bond formation and oxidation of donor-acceptor cyclopropanes with tetrahydroisoquinolines: access to benzo-fused indolizines. Chem Commun (Camb) 2024; 60:4068-4071. [PMID: 38506143 DOI: 10.1039/d4cc00810c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
One-pot C-N/C-C bond formation of donor-acceptor cyclopropanes (DACs) with tetrahydroisoquinolines (THIQs) has been achieved to furnish benzo-fused indolizines. These reactions involve a MgI2-catalyzed ring opening of DACs and oxidative annulation using Mn(OAc)3·2H2O. The substrate scope and functional group diversity are the important practical features.
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Affiliation(s)
- Pallab Karjee
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India.
| | - Bijoy Debnath
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India.
| | - Santu Mandal
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India.
| | - Sharajit Saha
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India.
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4
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Yan J, Zhong S, Chen X, Luo Y, Cao H, Liu X, Zhao L. Controlled and Site-Selective C-H/N-H Alkenylation, Dialkenylation, and Dehydrogenative β-Alkenylation of Various N-Heterocycles. J Org Chem 2024; 89:4840-4850. [PMID: 38502550 DOI: 10.1021/acs.joc.4c00064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Here, we report controlled and site-selective C-H alkenylation and dialkenylation of indolizines and pyrrolo[1,2-a]quinolines with β-alkoxyvinyl trifluoromethylketones under simple and practical conditions. Moreover, this direct C-H alkenylation strategy can also be extended to imidazo[1,2-a]pyridines. Notably, without a transition metal and external oxidant, efficient dehydrogenative β-alkenylation of tertiary amines with β-alkoxyvinyl trifluoromethylketones is presented.
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Affiliation(s)
- Jin Yan
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Advanced Drug Delivery, and Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Suijie Zhong
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Advanced Drug Delivery, and Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Xu Chen
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Advanced Drug Delivery, and Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Yihuan Luo
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Advanced Drug Delivery, and Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Hua Cao
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Advanced Drug Delivery, and Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Xiang Liu
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Advanced Drug Delivery, and Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
| | - Limin Zhao
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Advanced Drug Delivery, and Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Zhongshan 528458, P. R. China
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5
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Zhu Z, Wu Q, Song X, Ni Q. Thermodynamic Controlled Regioselective C1-Functionalization of Indolizines with 3-Hydroxyisoindolinones via Brønsted Acid Catalyzed aza-Friedel-Crafts Reaction. J Org Chem 2024; 89:2794-2799. [PMID: 38294192 DOI: 10.1021/acs.joc.3c02522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
A Brønsted acid catalyzed aza-Friedel-Crafts reaction of indolizines with 3-hydroxyisoindolinones has been established, which constructs isoindolinone derivatives bearing a tetrasubstituted stereocenter in good to high yields and enantioselectivities. Notably, this strategy provides a new access to C1-functionalization of indolizines with excellent regioselectivities. Moreover, this intriguing C1-regioselective transformation was induced under thermodynamic control.
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Affiliation(s)
- Zhiming Zhu
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, Anhui, P. R. China
| | - Qianling Wu
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, Anhui, P. R. China
| | - Xiaoxiao Song
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, Anhui, P. R. China
| | - Qijian Ni
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, Anhui, P. R. China
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6
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Liu Q, Wang F, He ZY, Zhang H, Wang JR, Li QH, Zhang Z, Xu H. Switchable Synthesis of Spirodihydroindolizines and Indolizines from Aurones and Pyridin-2-yl Active Methylene Compounds. J Org Chem 2024; 89:1753-1761. [PMID: 38252457 DOI: 10.1021/acs.joc.3c02459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
A novel and flexible domino reaction of aurones with pyridin-2-yl active methylene compounds promoted by I2/BF3 has been developed to afford spirodihydroindolizines and indolizines in a controllable manner. When the reaction was performed in 1,2-dichloroethane at 80 °C, a variety of spirodihydroindolizines were obtained, whereas it almost exclusively provided a series of indolizines when the reaction was performed in a mixed solvent of 1,2-dichloroethane and N,N-dimethylformamide at a relatively higher temperature of 100 °C. Being metal-free, excellent product selectivity, high atom economy, good functional group tolerance, and feasibility for large-scale synthesis are the salient features of the developed methodology.
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Affiliation(s)
- Quan Liu
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Feng Wang
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Zeng-Yang He
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
- Technology Center, China Tobacco Anhui Industrial Co., Ltd., Hefei 230088, P. R. China
| | - Hui Zhang
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Jia-Rong Wang
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Qing-Hai Li
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Ze Zhang
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Hui Xu
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
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7
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Li F, Yang Q, Liu MY, An PX, Du YL, Wang YB. Ag(I)-Mediated Annulation of 2-(2-Enynyl)pyridines and Propargyl Amines to Access 1-(2 H-Pyrrol-3-yl)indolizines. J Org Chem 2024; 89:304-312. [PMID: 38126126 DOI: 10.1021/acs.joc.3c02024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
An effective Ag(I)-mediated annulation of 2-(2-enynyl)pyridines and propargyl amines was developed, unexpectedly affording a broad range of functionalized 1-(2H-pyrrol-3-yl)indolizines in moderate to excellent yields. The developed method is characterized by operational simplicity, ready availability of starting materials, high regioselectivity, and broad substrate scope under mild reaction conditions. The Ag(I)-promoted cyclization of 2-(2-enynyl)pyridines and propargyl amines possibly results in the formation of the spiroindolizine, the ring-opening rearrangement of which may give the 1-(2H-pyrrol-3-yl)indolizine. Furthermore, a gram-scale reaction and synthetic transformations are also studied.
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Affiliation(s)
- Feng Li
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
| | - Qing Yang
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
| | - Ming-Yue Liu
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
| | - Pei-Xuan An
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
| | - Ya-Long Du
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
| | - Yan-Bo Wang
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
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8
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da Silva TS, da Silva Souza M, Andricopulo AD, Coelho F. Discovery of indolizine lactones as anticancer agents and their optimization through late-stage functionalization. RSC Adv 2023; 13:20264-20270. [PMID: 37416908 PMCID: PMC10321224 DOI: 10.1039/d3ra03395c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 06/26/2023] [Indexed: 07/08/2023] Open
Abstract
Indolizines fused with a seven-member lactone ring were identified as a promising scaffold in the search for new anticancer agents. Through a modular synthetic sequence, a library of cis and trans indolizines lactones had their antiproliferative activity evaluated against hormone-refractory prostate DU-145 and triple-negative breast MDA-MB-231 cancer cell lines. A methoxylated analogue was identified as an initial hit against MDA-MB-231 and late-stage functionalization of the indolizine core led to analogues within potencies up to twenty times higher than the parent precursor.
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Affiliation(s)
- Thiago Sabino da Silva
- Laboratory of Synthesis of Natural Products and Drugs, Institute of Chemistry, University of Campinas Rua Monteiro Lobato, S/N, 13083-970, Campinas São Paulo Brazil
| | - Matheus da Silva Souza
- Laboratory of Medicinal and Computational Chemistry, Institute of Physics of Sao Carlos, University of Sao Paulo - Avenida Joao Dagnone 1100-13563-120 - Sao Carlos SP Brazil
| | - Adriano Defini Andricopulo
- Laboratory of Medicinal and Computational Chemistry, Institute of Physics of Sao Carlos, University of Sao Paulo - Avenida Joao Dagnone 1100-13563-120 - Sao Carlos SP Brazil
| | - Fernando Coelho
- Laboratory of Synthesis of Natural Products and Drugs, Institute of Chemistry, University of Campinas Rua Monteiro Lobato, S/N, 13083-970, Campinas São Paulo Brazil
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9
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Kumari A, Jain A, Shukla K, Patra R, Rana NK. A reusable polymer anchored pyridine mediated formal [4 + 1] annulation reaction for the diastereoselective synthesis of 2,3-dihydrobenzofurans. Org Biomol Chem 2023. [PMID: 37376919 DOI: 10.1039/d3ob00804e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
We have developed a highly stereoselective formal [4 + 1] annulation reaction to construct trans-2,3-dihydrobenzofurans utilising in situ generated supported pyridinium ylide. This approach has excellent substrate versatility and gram-scale synthesis capability. Moreover, the polymer-anchored pyridine has been recovered and reused multiple times. The product has been transformed into valuable molecules.
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Affiliation(s)
- Akanksha Kumari
- Department of Chemistry, Indian Institute of Technology Jodhpur, Rajasthan 342030, India.
| | - Anshul Jain
- Department of Chemistry, Indian Institute of Technology Jodhpur, Rajasthan 342030, India.
| | - Khyati Shukla
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India
| | - Ranjan Patra
- Amity Institute of Click Chemistry Research & Studies, Amity University, Uttar Pradesh 201303, India
| | - Nirmal K Rana
- Department of Chemistry, Indian Institute of Technology Jodhpur, Rajasthan 342030, India.
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10
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Jain A, Regina A, Kumari A, Patra R, Paranjothy M, Rana NK. Reusable Supported Pyridine-Mediated Cascade Synthesis of trans-2,3-Dihydroindoles via In Situ-Generated N-Ylide. Org Lett 2023; 25:3790-3795. [PMID: 37184141 DOI: 10.1021/acs.orglett.3c01295] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Merrifield resin-anchored pyridines were prepared and applied as reusable mediators for trans-selective cascade synthesis of 2,3-dihydroindoles. The developed approach relied on in situ N-ylide formation followed by Michael substitution reactions. The cascade reaction was also carried out efficiently with simple pyridine. The products were further transformed into synthetically valuable compounds, and supported pyridine was reused for multiple cycles. Density functional theory calculations confirmed the trans-selectivity as the lower-energy pathway.
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Affiliation(s)
- Anshul Jain
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342030, India
| | - Anitta Regina
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342030, India
| | - Akanksha Kumari
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342030, India
| | - Ranjan Patra
- Amity Institute of Click Chemistry Research & Studies, Amity University, Noida, Uttar Pradesh 201303, India
| | - Manikandan Paranjothy
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342030, India
| | - Nirmal K Rana
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342030, India
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11
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Zhang C, Wang W, Zhu X, Chen L, Luo H, Guo M, Liu D, Liu F, Zhang H, Li Q, Lin J. Synthesis of Indolizines via Tf 2O-Mediated Cascade Reaction of Pyridyl-enaminones with Thiophenols/Thioalcohols. Org Lett 2023; 25:1192-1197. [PMID: 36779678 DOI: 10.1021/acs.orglett.3c00177] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
A cost-effective, highly regioselective and metal-free version for the synthesis of indolizine derivatives by means of Tf2O-mediated cascade reaction of pyridyl-enaminones and thiophenols/thioalcohols under mild reaction conditions has been reported. Diverse electron-rich indolizine derivatives could be obtained in up to 94% yield via the selective 1,4-addition of vinyl iminium triflate tandem cyclization/aromatization, which allowed the simultaneous construction of C-N and C-S/and one example of C-Se bonds.
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Affiliation(s)
- Changyuan Zhang
- Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, College of Chemistry and Bio-engineering, Yichun University, Yichun, 336000, P.R. China
| | - Wei Wang
- Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, College of Chemistry and Bio-engineering, Yichun University, Yichun, 336000, P.R. China
| | - Xuncheng Zhu
- Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, College of Chemistry and Bio-engineering, Yichun University, Yichun, 336000, P.R. China
| | - Lulu Chen
- Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, College of Chemistry and Bio-engineering, Yichun University, Yichun, 336000, P.R. China
| | - Hejiang Luo
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, P.R. China
| | - Mengping Guo
- Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, College of Chemistry and Bio-engineering, Yichun University, Yichun, 336000, P.R. China
| | - Dan Liu
- Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, College of Chemistry and Bio-engineering, Yichun University, Yichun, 336000, P.R. China
| | - Fan Liu
- Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, College of Chemistry and Bio-engineering, Yichun University, Yichun, 336000, P.R. China
| | - Huisheng Zhang
- Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, College of Chemistry and Bio-engineering, Yichun University, Yichun, 336000, P.R. China
| | - Qi Li
- Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, College of Chemistry and Bio-engineering, Yichun University, Yichun, 336000, P.R. China
| | - Jianping Lin
- Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, College of Chemistry and Bio-engineering, Yichun University, Yichun, 336000, P.R. China
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12
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A recyclable stereoauxiliary aminocatalyzed strategy for one-pot synthesis of indolizine-2-carbaldehydes. Commun Chem 2023; 6:40. [PMID: 36823457 PMCID: PMC9950359 DOI: 10.1038/s42004-023-00828-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 02/01/2023] [Indexed: 02/25/2023] Open
Abstract
Indolizine-carbaldehydes with the easily modifiable carbaldehyde group are important synthetic targets as versatile precursors for distinct indolizines. However, the efficient one-pot construction of trisubstituted indolizine-2-carbaldehydes represents a long-standing challenge. Herein, we report an unprecedented recyclable stereoauxiliary aminocatalytic approach via aminosugars derived from biomass, which enable the efficient one-pot synthesis of desired trisubstituted indolizine-2-carbaldehydes via [3+2] annulations of acyl pyridines and α,β-unsaturated aldehyde. Compared to the steric shielding effect from α-anomer, a stereoauxiliary effect favored by β-anomer of D-glucosamine is supported by control experiments. Furthermore, polymeric chitosan containing predominantly β-D-anhydroglucosamine units also shows excellent catalytic performance in aqueous solutions for the conversion of various substrates, large-scale synthesis and catalytic cycling experiments. Thus, our approach advances the existing methodologies by providing a rich library of indolizine-2-aldehydes. In addition, it delivers an efficient protocol for a set of late-stage diversification and targeted modifications of bioactive molecules or drugs, as showcased with 1,2,3-trisubstituted indolizine-2-carbaldehydes.
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13
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Zhao L, Li W, Liu J, Ni L, Liu Z, Shen H, Cao H, Liu X. Transition metal-free annulative vinylene transfer via the 1,3-dipolar reaction of N-ylides: access to benzo-fused indolizines. Org Biomol Chem 2022; 20:9604-9608. [PMID: 36412532 DOI: 10.1039/d2ob01846b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
An efficient metal-free annulative vinylene transfer protocol for the synthesis of benzo-fused indolizines via 1,3-dipolar cycloadditions of N-ylides with vinylene carbonate has been developed. Vinylene carbonate serves as an acetylene surrogate without any external oxidant involved. This transformation leads to the direct construction of versatile benzo-fused indolizine derivatives in moderate to good yields.
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Affiliation(s)
- Limin Zhao
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China.
| | - Wen Li
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China.
| | - Jiali Liu
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China.
| | - Linying Ni
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China.
| | - Zhihao Liu
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China.
| | - Hao Shen
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China.
| | - Hua Cao
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China.
| | - Xiang Liu
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan 528458, China.
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14
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Dinitro Anacardic Acid Copper(II) Complex—A Bio‐based Catalyst for Room Temperature Synthesis of Indolizine. ChemistrySelect 2022. [DOI: 10.1002/slct.202202420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Li X, Chen Z, Chen W, Xie X, Zhou H, Liao Y, Yu F, Huang J. B 2pin 2-Mediated Cascade Cyclization/Aromatization Reaction: Facial Access to Functionalized Indolizines. Org Lett 2022; 24:7372-7377. [PMID: 36173232 DOI: 10.1021/acs.orglett.2c02905] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Herein, a B2pin2-mediated radical cascade cyclization/aromatization reaction of enaminone with pyridine is described. This strategy provides a practical way for the construction of valuable functionalized indolizines under metal-, external oxidant-, and base-free conditions, which could be compatible with various kinds of functional groups, such as halogen, π-system, heterocycle, ferrocenyl, etc. A preliminary mechanism investigation indicated that the pyridine-boryl radical formed in situ triggered the reaction to occur.
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Affiliation(s)
- Xiaoning Li
- School of Pharmacy, Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education, Gannan Medical University, Ganzhou 341000, PR China
| | - Zunsheng Chen
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China
| | - Weiming Chen
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China
| | - Xin Xie
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China
| | - Hui Zhou
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China
| | - Yingmei Liao
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China
| | - Fuchao Yu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Jiuzhong Huang
- School of Pharmacy, Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education, Gannan Medical University, Ganzhou 341000, PR China
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16
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Anderson CE, Bos HI, Dreher DM, Hartgerink CT, Scholtens CJ, Staples RJ. Synthesis of Ester-Substituted Indolizines from 2-Propargyloxypyridines and 1,3-Dicarbonyls. J Org Chem 2022; 87:10241-10249. [PMID: 35849640 DOI: 10.1021/acs.joc.2c01219] [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
Two new complementary Au(I)-catalyzed methods for the preparation of ester-substituted indolizines from easily accessible 2-propargyloxypyridines and either acetoacetates or dimethyl malonate are reported. These reactions tolerate a wide range of functionality, allowing for diversification at three distinct positions of the product (R, R1, R2). For electron-poor substrates, the highest yields are observed upon reaction with acetoacetates, while neutral and electron-rich substrates give higher yields upon treatment with dimethyl malonate.
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Affiliation(s)
- Carolyn E Anderson
- Department of Chemistry and Biochemistry, Calvin University, 1726 Knollcrest Circle SE, Grand Rapids, Michigan 49546, United States
| | - Haleigh I Bos
- Department of Chemistry and Biochemistry, Calvin University, 1726 Knollcrest Circle SE, Grand Rapids, Michigan 49546, United States
| | - Daniel M Dreher
- Department of Chemistry and Biochemistry, Calvin University, 1726 Knollcrest Circle SE, Grand Rapids, Michigan 49546, United States
| | - Colin T Hartgerink
- Department of Chemistry and Biochemistry, Calvin University, 1726 Knollcrest Circle SE, Grand Rapids, Michigan 49546, United States
| | - Chase J Scholtens
- Department of Chemistry and Biochemistry, Calvin University, 1726 Knollcrest Circle SE, Grand Rapids, Michigan 49546, United States
| | - Richard J Staples
- Center for Crystallographic Research, Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
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17
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Mane KD, Rupanawar BD, Suryavanshi GM. Visible Light Promoted, Photocatalyst Free C(sp2)–H Bond Functionalization of Indolizines via EDA Complexes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kishor D. Mane
- CSIR-National Chemical Laboratory: National Chemical Laboratory CSIR CEPD Pune INDIA
| | | | - Gurunath Mallappa Suryavanshi
- CSIR-National Chemical Laboratory: National Chemical Laboratory CSIR Chemical Engineering and Process Developement Dr. Homi Bhabha Road411008India 411008 Pune INDIA
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18
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Wang Y, Xie J, Lu P, Wang Y. Rh( ii)-catalyzed synthesis of 5 H-isochromeno[3,4- b]indolizines from 4-diazoisochroman-3-imines and pyridines. Org Biomol Chem 2022; 20:8484-8488. [DOI: 10.1039/d2ob01400a] [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
A Rh(ii)-catalyzed (3 + 2) annulation of pyridines with 4-diazoisochroman-3-imines furnished 5H-isochromeno[3,4-b]indolizines with moderate to good yields and complete regioselectivity.
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Affiliation(s)
- Yingxiao Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Jianwei Xie
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Ping Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yanguang Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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