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Deepthi A, Leena SS, Krishnan D. Update on thiopyran-fused heterocycle synthesis (2013-2024). Org Biomol Chem 2024; 22:5676-5717. [PMID: 38912843 DOI: 10.1039/d4ob00497c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2024]
Abstract
Thiopyrans and their fused derivatives have significant synthetic relevance owing to their biological importance and occurrence in natural products. The current article provides an overview of synthetic strategies employed for the construction of thiopyran-fused heterocycles. In particular, this article discusses synthetic methods for the fusion of thiopyran with heterocycles such as indole, quinoline, pyrimidine, pyridine, thiophene, chromene, oxazole, pyrazole, pyran and furan and covers the literature from 2013 to 2024. The most common precursors for thiopyrano[2,3-b]indoles, thiopyranoquinolines and thiopyranothiazoles are indoline-2-thione, 2-mercaptoquinoline-3-carbaldehyde and thiazolidinone, respectively, and various reactions involving these are described in detail here. Asymmetric syntheses of thiopyranoindoles achieved using chiral catalysts based on thiourea, proline and metal complexes are also included. The biological activity associated with some compounds is also discussed.
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Affiliation(s)
- Ani Deepthi
- Department of Chemistry, University of Kerala, Kariavattom, Trivandrum - 695581, Kerala, India.
| | | | - Devika Krishnan
- Department of Chemistry, University of Kerala, Kariavattom, Trivandrum - 695581, Kerala, India.
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Barakat KM, Adel Elsayed S, Yılmaz M, Abdel-Latif E, Etman HA, Hamed MA, El Nemr A. Design, Synthesis And Antibacterial Assessment Of Active (4-Arylazo-3-Methyl-2-Thienyl) 4-Antipyrine Ketones. Chem Biodivers 2024:e202400894. [PMID: 38787357 DOI: 10.1002/cbdv.202400894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 05/24/2024] [Indexed: 05/25/2024]
Abstract
The chemicals formed from antipyrines are flexible organic building blocks that are employed in the development of pharmaceuticals. By diazotizing (4-arylazo-3-hydroxy-2-thienyl) 4-antipyrine ketones 1a, 1b and 1c and (4-arylazo-3-methyl-2-thienyl) 4-antipyrine ketones (2a, 2b and 2c) further replaced with six other coupling components, a broad spectrum of hybrid molecules have been created. Mass spectra, NMR, FTIR, and elemental analyses have all been used to confirm the structures of the synthesised compounds. The antimicrobial screening was investigated by agar well diffusion and diluting the broth technique against both Gram-negative and positive-tested bacterial strains. (3-methyl-5-(phenylamino)-4-(4-tolylazo)-2-thienyl) 4-antipyrine ketone (2a) was found to be superior to Ciprofloxacin against test strains: Acinetobacter sp (34.33±1.15 mm), Listeria monocytogenes (29.33±1.15 mm) and Streptococcus sp. (19.33±1.15 mm). Also, good to moderate activities were expressed as minimum inhibitory concentration (MIC) and minimum bacterial concentration (MBC) which were recorded at 9±1 to 59.67±4.51 μg/mL and 16±4 to >512 μg/mL, respectively, using compounds 2a, 2b, and 2c. MBC/MIC ratio showed, that only, 2a and 2b have a bactericidal effect but other antipyrines with bacteriostatic strength. To conclude, it was suggested that the use of these novel synthesized (4-arylazo-3-methyl-2-thienyl) 4-antipyrine ketone derivatives molecules as a new chemical class of antimicrobial agents to perform new drug discovery in pharmaceutical preparations and medicinal research.
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Affiliation(s)
- Khouloud M Barakat
- National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, Alexandria, Egypt
| | - Shymaa Adel Elsayed
- National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, Alexandria, Egypt
| | - Murat Yılmaz
- Osmaniye Korkut Ata University, Bahçe Vocational School, Department of Chemistry and Chemical Processing Technologies, Osmaniye, 80000, Türkiye
| | - Ehab Abdel-Latif
- Department of Chemistry, Faculty of Science, Mansoura University, ET, 35516, Mansoura, Egypt
| | - Hassan Ali Etman
- Department of Chemistry, Faculty of Science, Mansoura University, ET, 35516, Mansoura, Egypt
| | - Mohamed A Hamed
- National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, Alexandria, Egypt
| | - Ahmed El Nemr
- National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, Alexandria, Egypt
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Mandal PK, Chakrawarti R, Katukojvala S. [3+3] Annulation of Diazoenals and α-Mercapto Ketones via Protic Sulfonium Ylides: Direct Synthesis of 2 H-Thiopyrans, Innovative Progenitors for Unstudied 2 H-Thiopyran-2-ones and 4 H-Thiopyran-4-ones. Org Lett 2024. [PMID: 38625754 DOI: 10.1021/acs.orglett.4c01033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Abstract
Herein, we report a new Rh(II)/Sc(III)-catalyzed [3+3] annulation between diazoenals and α-mercapto ketones for the direct synthesis of 4-formyl-2H-thiopyrans. The reaction proceeds via protic sulfonium ylides derived from highly electrophilic Rh-enalcarbenoids, followed by regioselective intramolecular aldol condensation. Further studies revealed that 4-formyl-2H-thiopyrans are novel precursors for unstudied 2H-thiopyran-2-ones and 4H-thiopyran-4-ones. The 4H-thiopyran-4-ones were obtained via a novel O2/Et3N-mediated oxidative deformylation. This methodology was applied to the short synthesis of structurally complex pyrimidine-fused 2H-thiopyran via cascade Schmidt, Ritter, and intramolecular cyclization reactions.
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Affiliation(s)
- Pratap Kumar Mandal
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Rahul Chakrawarti
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Sreenivas Katukojvala
- Department of Chemistry, Indian Institute of Science Education & Research Bhopal, Bhopal, Madhya Pradesh 462066, India
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Maddahi M, Asghari S, Pasha GF. A facile one-pot green synthesis of novel 2-amino-4H-chromenes: antibacterial and antioxidant evaluation. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04893-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Bhuvaneswari K, Nagasundaram N, Lalitha A. Synthesis, anti‐inflammatory activity, and molecular docking study of novel azo bis antipyrine derivatives against cyclooxygenase‐2 enzyme. J CHIN CHEM SOC-TAIP 2020. [DOI: 10.1002/jccs.202000265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Study of three-component reaction of α-ketoesters and active methylenes with OH-acids to synthesize new 2-amino-4H-pyran derivatives and evaluation of their antibacterial and antioxidant activities. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-019-04066-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Bakhshi R, Zeynizadeh B, Mousavi H. Green, rapid, and highly efficient syntheses of
α
,
α′
‐bis[(aryl or allyl)idene]cycloalkanones and 2‐[(aryl or allyl)idene]‐1‐indanones as potentially biologic compounds via solvent‐free microwave‐assisted Claisen–Schmidt condensation catalyzed by MoCl
5. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201900081] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Reza Bakhshi
- Department of Organic Chemistry, Faculty of ChemistryUrmia University Urmia Iran
| | - Behzad Zeynizadeh
- Department of Organic Chemistry, Faculty of ChemistryUrmia University Urmia Iran
| | - Hossein Mousavi
- Department of Organic Chemistry, Faculty of ChemistryUrmia University Urmia Iran
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