1
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Holt TA, Novitskiy IM, Kutateladze AG. Systematic Photoassisted Access to Designer Polyheterocycles via Modular Blocks and Scaffolding. Org Lett 2024; 26:734-738. [PMID: 38214569 DOI: 10.1021/acs.orglett.3c04186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Diverse polyheterocycles are accessed via scaffolded photoassisted synthesis involving decarboxylative aromatization of the primary photoproducts from intramolecular cycloadditions of azaxylylenes and tethered heteroaromatic unsaturated pendants.
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Affiliation(s)
- Tina A Holt
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, United States
| | - Ivan M Novitskiy
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, United States
| | - Andrei G Kutateladze
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, United States
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2
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Nong CM, Lv SN, Shi WM, Liang C, Su GF, Mo DL. Synthesis of 1,2,4-Oxadiazolines through Deoxygenative Cyclization of N-Vinyl-α,β-Unsaturated Nitrones with in Situ Generated Nitrile Oxides from Hydroxamoyl Chlorides. Org Lett 2023; 25:267-271. [PMID: 36583596 DOI: 10.1021/acs.orglett.2c04121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A variety of 1,2,4-oxadiazoline derivatives were synthesized in moderate to good yields through a deoxygenative cyclization cascade reaction of N-vinyl-α,β-unsaturated nitrones and hydroxamoyl chlorides. Mechanistic studies revealed that the reaction underwent double additions of nitrile oxides to N-vinyl-α,β-unsaturated nitrones, sequential elimination, and intramolecular cyclization to afford 1,2,4-oxadiazolines. Alternatively, 1,2,5-oxadiazolines were also obtained as major products in i-PrOH solvent through [3 + 3] cycloaddition and selective [3,3]-rearrangement. Moreover, the prepared 1,2,4-oxadiazolines were easily converted to polysubstituted pyrroles under thermal conditions.
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Affiliation(s)
- Cai-Mei Nong
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin, 541004, China
| | - Si-Ning Lv
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin, 541004, China
| | - Wei-Min Shi
- School of Medicine, Guangxi University of Science and Technology, 257 Liu Shi Road, Liuzhou, 545006, China
| | - Cui Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin, 541004, China
| | - Gui-Fa Su
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin, 541004, China
| | - Dong-Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin, 541004, China
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3
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Jiao L, Wang Y, Ding L, Zhang C, Wang XN, Chang J. Synthesis of 2-Aminopyrroles Via Metal-Free Annulation of Ynamides with 2 H-Azirines. J Org Chem 2022; 87:15564-15570. [DOI: 10.1021/acs.joc.2c02103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lianhong Jiao
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Yanan Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Lixia Ding
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Chaofeng Zhang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Xiao-Na Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Junbiao Chang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
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4
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Saranya S, Saranya PV, Anilkumar G. Copper‐Catalyzed Base‐free Protocol for the Sonogashira‐type Coupling of Phenylacetylenes with Boronic Acid Derivatives under Air. ChemistrySelect 2022. [DOI: 10.1002/slct.202202191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Salim Saranya
- School of Chemical Sciences Mahatma Gandhi University P. D. Hills 686560 Kerala India
| | | | - Gopinathan Anilkumar
- School of Chemical Sciences Mahatma Gandhi University P. D. Hills 686560 Kerala India
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5
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Murtinho D, Elisa da Silva Serra M. Transition Metal Catalysis in Synthetic Heterocyclic Chemistry. HETEROCYCLES 2022. [DOI: 10.1002/9783527832002.ch5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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6
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Pintro CJ, Long AK, Amonette AJ, Lobue JM, Padgett CW. Crystal structures and Hirshfeld surface analysis of 5-amino-1-(4-methoxyphenyl)pyrazole-4-carboxylic acid and 5-amino-3-(4-methoxyphenyl)isoxazole. Acta Crystallogr E Crystallogr Commun 2022; 78:336-339. [PMID: 35371546 PMCID: PMC8900502 DOI: 10.1107/s2056989022001827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 02/16/2022] [Indexed: 11/11/2022]
Abstract
The title compounds, C11H11N3O3, (I), and C10H10N2O2, (II), are commercially available and were crystallized from ethyl acetate solution. The dihedral angle between the pyrazole and phenyl rings in (I) is 52.34 (7)° and the equivalent angle between the isoxazole and phenyl rings in (II) is 7.30 (13)°. In the crystal of (I), the molecules form carboxylic acid inversion dimers with an R(8) ring motif via pairwise O—H...O hydrogen bonds. In the crystal of (II), the molecules are linked via N—H...N hydrogen bonds forming chains propagating along [010] with a C(5) motif. A weak N—H...π interaction also features in the packing of (II). Hirshfeld surface analysis was used to explore the intermolecular contacts in the crystals of both title compounds: the most important contacts for (I) are H...H (41.5%) and O...H/H...O (22.4%). For (II), the most significant contact percentages are H...H (36.1%) followed by C...H/H...C (31.3%).
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7
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Hernandez R RA, Burchell-Reyes K, Braga APCA, Lopez JK, Forgione P. Solvent-free synthesis of 3,5-isoxazoles via 1,3-dipolar cycloaddition of terminal alkynes and hydroxyimidoyl chlorides over Cu/Al 2O 3 surface under ball-milling conditions. RSC Adv 2022; 12:6396-6402. [PMID: 35424611 PMCID: PMC8981965 DOI: 10.1039/d1ra08443g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 02/10/2022] [Indexed: 01/20/2023] Open
Abstract
Scalable, solvent-free synthesis of 3,5-isoxazoles under ball-milling conditions has been developed. The proposed methodology allows the synthesis of 3,5-isoxazoles in moderate to excellent yields from terminal alkynes and hydroxyimidoyl chlorides, using a recyclable Cu/Al2O3 nanocomposite catalyst. Furthermore, the proposed conditions are reproducible to a 1.0-gram scale without further milling time variations. A practical and scalable mechanochemical 1,3-dipolar cycloaddition between hydroxyimidoyl chlorides and terminal alkynes catalyzed by Cu/Al2O3 allows a quick access to 3,5-isoxazole derivatives.![]()
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Affiliation(s)
- Rafael A Hernandez R
- Department of Chemistry and Biochemistry, Concordia University 7141 rue Sherbrooke O. Montréal QC Canada H4B 1R6
| | - Kelly Burchell-Reyes
- Department of Chemistry and Biochemistry, Concordia University 7141 rue Sherbrooke O. Montréal QC Canada H4B 1R6
| | - Arthur P C A Braga
- Department of Chemistry and Biochemistry, Concordia University 7141 rue Sherbrooke O. Montréal QC Canada H4B 1R6
| | - Jennifer Keough Lopez
- Department of Chemistry and Biochemistry, Concordia University 7141 rue Sherbrooke O. Montréal QC Canada H4B 1R6
| | - Pat Forgione
- Department of Chemistry and Biochemistry, Concordia University 7141 rue Sherbrooke O. Montréal QC Canada H4B 1R6 .,Centre for Green Chemistry and Catalysis, McGill University 801 rue Sherbrooke O. Montréal QC Canada H3A 0B8
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8
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Gwinn RK, Boggess AE, Winter EP, Nataro C. Synthesis of disubstituted furans catalysed by [(AuCl) 2(μ-bis(phosphino)metallocene)] and Na[BArF 24]. Dalton Trans 2022; 51:17000-17007. [DOI: 10.1039/d2dt02999e] [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
Two new gold compounds with bis(phosphino)metallocene ligands were prepared and characterized by NMR and X-ray crystallography. These and related compounds are catalysts in formation of disubstituted furans from terminal alkynes and pyridine-N-oxide.
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Affiliation(s)
- Reilly K. Gwinn
- Hugel Science Center, Department of Chemistry, 701 Sullivan Road, Lafayette College, Easton, PA 18042, USA
| | - Anna E. Boggess
- Hugel Science Center, Department of Chemistry, 701 Sullivan Road, Lafayette College, Easton, PA 18042, USA
| | - Elizabeth P. Winter
- Hugel Science Center, Department of Chemistry, 701 Sullivan Road, Lafayette College, Easton, PA 18042, USA
| | - Chip Nataro
- Hugel Science Center, Department of Chemistry, 701 Sullivan Road, Lafayette College, Easton, PA 18042, USA
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9
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Madhavan S, Keshri SK, Kapur M. Transition Metal‐Mediated Functionalization of Isoxazoles: A Review. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100560] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Suchithra Madhavan
- Department of Chemistry Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462066, MP India
| | - Santosh Kumar Keshri
- Department of Chemistry Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462066, MP India
| | - Manmohan Kapur
- Department of Chemistry Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462066, MP India
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10
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Shandilya S, Protim Gogoi M, Dutta S, Sahoo AK. Gold-Catalyzed Transformation of Ynamides. CHEM REC 2021; 21:4123-4149. [PMID: 34432929 DOI: 10.1002/tcr.202100159] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/27/2021] [Indexed: 11/07/2022]
Abstract
Ynamide, a unique species with inherited polarization of nitrogen lone pair electron to triple bond, has been largely used for the developement of novel synthetic methods and the construction of unusual N-bearing heterocycles. The reaction versatility of ynamide on umpolung reactivity, radical reactions and asymmetric synthesis have been recently reviewed. This review provides an overall scenic view into the gold catalyzed transformation of ynamides. The ynamides reactivity towards nitrogen-transfer reagents, such as azides, nitrogen ylides, isoxazoles, and anthranils; oxygen atom-transfer reagents, like nitrones, sulfoxides, and pyridine N-oxides; and carbon nucleophiles under gold catalysis are herein uncovered. The scope as well the mechanistic insights of each reaction is also briefed.
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Affiliation(s)
| | | | - Shubham Dutta
- School of Chemistry, University of Hyderabad, 500046, Hyderabad, India
| | - Akhila K Sahoo
- School of Chemistry, University of Hyderabad, 500046, Hyderabad, India
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11
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12
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Affiliation(s)
- Qun Li
- College of Food and Biology, Changchun Polytechnic, Changchun, China
| | - Liguo Han
- College of Food and Biology, Changchun Polytechnic, Changchun, China
| | - Li Zhao
- Nursing College of Chifeng University, Chifeng, Inner Mongolia, China
| | - Yue Hou
- Changchun University of Science and Technology, Changchun, China
| | - Ranjit Sharma
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, India
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13
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Simm PE, Sekar P, Richardson J, Davies PW. Gold(I)-Catalyzed Synthesis of 3-Sulfenyl Pyrroles and Indoles by a Regioselective Annulation of Alkynyl Thioethers. ACS Catal 2021; 11:6357-6362. [PMID: 34306808 PMCID: PMC8291588 DOI: 10.1021/acscatal.1c01457] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/03/2021] [Indexed: 01/01/2023]
Abstract
![]()
The combination of
nucleophilic nitrenoids and π-acid catalysis
has emerged as a powerful tool in heterocycle synthesis. Accessing
more varied heterocycle-substitution patterns by maintaining the same
reaction pathways across different alkynes remains a challenge. Here
we show that Au(I) catalysis of isoxazole-based nitrenoids with alkynyl
thioethers provides controlled access to (3 + 2) annulation by a regioselective
addition β to the sulfenyl group. The reaction with isoxazole-containing
nitrenoids delivers sulfenylated pyrroles and indoles as single regioisomers
bearing useful functional groups and structural variety.
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Affiliation(s)
- Peter E. Simm
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Prakash Sekar
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | | | - Paul W. Davies
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
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14
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Yu H, Wang W, Wang K, Zhang X. Complementary and Regioselective Synthesis of Isomeric 3-[Isoxazol-3(or 5)-yl]indoles from β-Ethylthio-β-indolyl-α,β-unsaturated Ketones. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1706658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractA simple and efficient method for the complementary and regioselective synthesis of isomeric 3-(isoxazol-5-yl)indoles and 3-(isoxazol-3-yl)indoles has been developed by the regioselective cyclocondensation reaction of β-ethylthio-β-indolyl-α,β-unsaturated ketones and hydroxylamine hydrochloride. It was found that the cyclocondensation reaction in the presence of excess NaOEt in refluxing EtOH gives 3-(isoxazol-5-yl)indoles in good yields, whereas using NaOAc in boiling AcOH gives 3-(isoxazol-3-yl)indoles in good yields.
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Affiliation(s)
- Haifeng Yu
- College of Chemistry, Baicheng Normal University
| | - Wenju Wang
- College of Chemistry, Baicheng Normal University
| | - Kehua Wang
- School of Chemistry and Life Science, Anshan Normal University
| | - Xue Zhang
- College of Chemistry, Baicheng Normal University
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15
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Arya GC, Kaur K, Jaitak V. Isoxazole derivatives as anticancer agent: A review on synthetic strategies, mechanism of action and SAR studies. Eur J Med Chem 2021; 221:113511. [PMID: 34000484 DOI: 10.1016/j.ejmech.2021.113511] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/16/2021] [Accepted: 04/29/2021] [Indexed: 12/13/2022]
Abstract
Breast cancer is the second most leading cause of death among women. Multiple drugs have been approved by FDA for the treatment of BC. The major drawbacks of existing drugs are the development of resistance, toxicity, selectivity problem. The other therapies like hormonal therapy, surgery, radiotherapy, and immune therapy are in use but showed many side effects like bioavailability issues, non-selectivity, pharmacokinetic-pharmacodynamic problems. Therefore, there is an urgent need to develop new moieties that are nonviolent and more effective in the treatment of cancer. Isoxazole derivatives have gain popularity in recent years due to anticancer potential with the least side effects. These derivatives act as an anticancer agent with different mechanisms like inducing apoptosis, aromatase inhibition, disturbing tubulin congregation, topoisomerase inhibition, HDAC inhibition, and ERα inhibition. In this article, we have explored the synthetic strategies, anticancer mechanism of action along with SAR studies of isoxazole derivatives.
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Affiliation(s)
- Girish Chandra Arya
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Ghhudha, Bathinda, Pb, 151401, India
| | - Kamalpreet Kaur
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Ghhudha, Bathinda, Pb, 151401, India
| | - Vikas Jaitak
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Ghhudha, Bathinda, Pb, 151401, India.
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16
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Feng Q, Huang H, Sun J. Ru-Catalyzed [3 + 2] Cycloaddition of Nitrile Oxides and Electron-Rich Alkynes with Reversed Regioselectivity. Org Lett 2021; 23:2431-2436. [PMID: 33750136 DOI: 10.1021/acs.orglett.1c00273] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Polarity reversal ("umpolung") of a functional group can override its inherent reactivity and lead to distinct bond-forming modes. Herein we describe a rarely studied cycloaddition between nitrile oxides and electron-rich alkynes with reversed regioselectivity, leading to the useful 4-heterosubstituted isoxazoles. The use of a ruthenium catalyst completely overrides the inherent polarity of nitrile oxides. This reversed regioselectivity was also observed for their reactions with a range of electron-deficient alkynes.
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Affiliation(s)
- Qiang Feng
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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17
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Philkhana SC, Badmus FO, Dos Reis IC, Kartika R. Recent Advancements in Pyrrole Synthesis. SYNTHESIS-STUTTGART 2021; 53:1531-1555. [PMID: 34366491 PMCID: PMC8340853 DOI: 10.1055/s-0040-1706713] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
This review article features selected examples on the synthesis of functionalized pyrroles that were reported between 2014 and 2019. Pyrrole is an important nitrogen-containing aromatic heterocycle that can be found in numerous compounds of biological and material significance. Given its vast importance, pyrrole continues to be an attractive target for the development of new synthetic reactions. The contents of this article are organized by the starting materials, which can be broadly classified into four different types: substrates bearing π-systems, substrates bearing carbonyl and other polar groups, and substrates bearing heterocyclic motifs. Brief discussions on plausible reaction mechanisms for most transformations are also presented.
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Affiliation(s)
- Satish Chandra Philkhana
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803, USA
| | - Fatimat O Badmus
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803, USA
| | - Isaac C Dos Reis
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803, USA
| | - Rendy Kartika
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803, USA
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18
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Jia J, Su Y, Yu HF, Du HT, Mei ZM. Eco-friendly and regioselective synthesis of 3-(isoxazol-5)-yl) indoles from β-ethylthio-β-indolyl-α, β-unsaturated ketones in water. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1894339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jia Jia
- College of Chemistry, Baicheng Normal University, Baicheng, China
| | - Ye Su
- College of Chemistry, Baicheng Normal University, Baicheng, China
| | - Hai-Feng Yu
- College of Chemistry, Baicheng Normal University, Baicheng, China
| | - Hai-Tao Du
- College of Chemistry, Baicheng Normal University, Baicheng, China
| | - Ze-Min Mei
- College of Chemistry, Baicheng Normal University, Baicheng, China
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19
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Hu YC, Zhao Y, Wan B, Chen QA. Reactivity of ynamides in catalytic intermolecular annulations. Chem Soc Rev 2021; 50:2582-2625. [PMID: 33367365 DOI: 10.1039/d0cs00283f] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Ynamides are unique alkynes with a carbon-carbon triple bond directly attached to the nitrogen atom bearing an electron-withdrawing group. The alkyne is strongly polarized by the electron-donating nitrogen atom, but its high reactivity can be finely tempered by the electron-withdrawing group. Accordingly, ynamides are endowed with both nucleophilic and electrophilic properties and their chemistry has been an active research field. The catalytic intermolecular annulations of ynamides, featuring divergent assembly of structurally important amino-heterocycles in a regioselective manner, have gained much attention over the past decade. This review aims to provide a comprehensive summary of the advances achieved in this area involving transition metal and acid catalysis. Moreover, the intermolecular annulations of ynamide analogs including ynol ethers and thioalkynes are also discussed, which can provide insights into the reactivity difference caused by the heteroatoms.
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Affiliation(s)
- Yan-Cheng Hu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
| | - Yingying Zhao
- School of Chemistry and Chemical Engineering, Liaoning Normal University, 850 Huanghe Road, Dalian 116029, China
| | - Boshun Wan
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
| | - Qing-An Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
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20
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Wang L, Tao Y, Zhang N, Li S. Convenient synthesis of 4,5-unsubstituted 3-aroylisoxazoles from methyl aryl ketones and (vinylsulfonyl)benzene in water. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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21
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Popov AV, Kobelevskaya VA, Titov ID, Larina LI, Rozentsveig IB. Synthesis of 5-Chloroisoxazoles Derived from 2,2-Dichlorovinyl Ketones. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s107042802011010x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Chen C, Cui S. BF3-promoted annulation of azonaphthalenes and ynamides for synthesis of benzo[e]indoles. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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23
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Campeau D, León Rayo DF, Mansour A, Muratov K, Gagosz F. Gold-Catalyzed Reactions of Specially Activated Alkynes, Allenes, and Alkenes. Chem Rev 2020; 121:8756-8867. [DOI: 10.1021/acs.chemrev.0c00788] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Dominic Campeau
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - David F. León Rayo
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Ali Mansour
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Karim Muratov
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Fabien Gagosz
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
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Wen H, Yan W, Chen P, Li Y, Tang Y. Catalyst-Free [4+2] Cycloaddition of Ynamides with 2-Halomethyl Phenols To Construct 2-Amino-4 H-Chromenes and α-Halo Enamides Simultaneously. J Org Chem 2020; 85:12870-12881. [PMID: 33000945 DOI: 10.1021/acs.joc.0c01258] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report the development of a facile protocol for the [4+2] cycloaddition of ynamides and 2-halomethyl phenols to afford the corresponding 2-amino-4H-chromenes and α-halo enamides under catalyst-free conditions. The reaction proceeds under mild conditions and exhibits good tolerance toward various functional groups and generates high yields. The plausible mechanism involves the formation of an active intermediate keteniminium as well as o-methylene quinone.
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Affiliation(s)
- Hao Wen
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Yushan Road, Qingdao 266003, P. R. China
| | - Weibo Yan
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Yushan Road, Qingdao 266003, P. R. China
| | - Ping Chen
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Yushan Road, Qingdao 266003, P. R. China
| | - Yu Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Yushan Road, Qingdao 266003, P. R. China
| | - Yu Tang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Yushan Road, Qingdao 266003, P. R. China.,Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology Qingdao 266237, P. R. China
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25
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Zhang YX, Chen LY, Sun JT, Si CM, Wei BG. Gold-Catalyzed Addition–N-Boc Cleavage–Cyclization of N,O-Acetal with Ynamides for Construction of 6-(tert-Butyldimethylsilyl)oxy-tetrahydropyrrolo[1,2-c][1,3]oxazin-1-ones. J Org Chem 2020; 85:12603-12613. [DOI: 10.1021/acs.joc.0c01776] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yan-Xue Zhang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Ling-Yan Chen
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
| | - Jian-Ting Sun
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Chang-Mei Si
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Bang-Guo Wei
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
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26
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Kumar P, Kapur M. Ruthenium(II)‐ and Copper(II)‐Mediated Synthesis of Trisubstituted Pyrroles from Isoxazoles and Acrylate Esters. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000176] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Pravin Kumar
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462066, MP India
| | - Manmohan Kapur
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462066, MP India
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Yang W, Liu X, Leung P, Li Y, Yang D, Chen Y. Iron‐Mediated Ring‐Opening and Rearrangement Cascade Synthesis of Polysubstituted Pyrroles from 4‐Alkenylisoxazoles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901649] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Wen Yang
- Department of Chemistry and BiochemistryQueens College of the City University of New York 65-30 Kissena Blvd., Queens New York 11367 USA
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, College of ChemistrySouth China Normal University Guangzhou 510006 People's Republic of China
| | - Xiaochen Liu
- Department of Chemistry and BiochemistryQueens College of the City University of New York 65-30 Kissena Blvd., Queens New York 11367 USA
- Ph.D. Program in Chemistry, TheGraduate Center of the City University of New York 365 Fifth Ave. New York, New York 10016 USA
| | - Pak‐Hing Leung
- Division of Chemistry & Biological Chemistry, School of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Yongxin Li
- Division of Chemistry & Biological Chemistry, School of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Dingqiao Yang
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, College of ChemistrySouth China Normal University Guangzhou 510006 People's Republic of China
| | - Yu Chen
- Department of Chemistry and BiochemistryQueens College of the City University of New York 65-30 Kissena Blvd., Queens New York 11367 USA
- Ph.D. Program in Chemistry, TheGraduate Center of the City University of New York 365 Fifth Ave. New York, New York 10016 USA
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28
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Han P, Mao ZY, Li M, Si CM, Wei BG, Lin GQ. Synthesis of Amide Enol Carbamates and Carbonates through Cu(OTf)2-Catalyzed Reactions of Ynamides with t-Butyl Carbamates/Carbonates. J Org Chem 2020; 85:4740-4752. [PMID: 32162916 DOI: 10.1021/acs.joc.9b03512] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Pan Han
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
- College of Chemistry and Chemical Engineering, China West Normal University, 1 Shida Road, Nanchong 637002, China
| | - Zhuo-Ya Mao
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Ming Li
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Chang-Mei Si
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Bang-Guo Wei
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Guo-Qiang Lin
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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