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Nakamura A, Rao F, Ukiya K, Matsunaga R, Ohira SI, Maegawa T. A concise synthesis of thioaurones via NBS-induced cyclization of MOM-protected 2'-mercaptochalcones. Org Biomol Chem 2023; 21:1134-1137. [PMID: 36484376 DOI: 10.1039/d2ob01995g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
A mild and efficient approach for the synthesis of thioaurones via NBS-induced cyclization of methoxymethyl-protected mercapto-chalcones has been developed. This simple method is highly functional group tolerant and provides straightforward access to thioaurones in good to high yields.
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Affiliation(s)
- Akira Nakamura
- School of Pharmaceutical Sciences, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.
| | - Fei Rao
- School of Pharmaceutical Sciences, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.
| | - Kazuchika Ukiya
- School of Pharmaceutical Sciences, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.
| | - Riko Matsunaga
- School of Pharmaceutical Sciences, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.
| | - Shin-Ichiro Ohira
- School of Pharmaceutical Sciences, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.
| | - Tomohiro Maegawa
- School of Pharmaceutical Sciences, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.
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Soundarya P, Sekar G. Cu-Catalyzed and iodine mediated synthesis of thioaurones via in situ C-S bond generation using xanthate as a sulfur surrogate. Org Biomol Chem 2022; 20:7405-7409. [PMID: 36098267 DOI: 10.1039/d2ob01211a] [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
An efficient method for synthesizing thioaurones has been developed using xanthate as an odorless sulfur surrogate. This reaction's key success lies in the use of iodine as a reagent, which promotes the α-iodination followed by cyclization of saturated ketones. This methodology has also been demonstrated with less reactive 2'-bromochalcones in good yield. Synthesis of the red isomer of indigo, i.e. a thia-analog of indirubin, was also achieved.
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Affiliation(s)
- Palanisamy Soundarya
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India.
| | - Govindasamy Sekar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India.
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3
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Chimaladenne V, Surapureddi SRK, Valluru KR, Kampli A, Brahman PK, Laxmi SV. Microwave induced formal [2 + 1] Michael-cyclization cascade sequence of 3-ylidene oxindoles and pyridinium phenacyl salts. SYNTHETIC COMMUN 2022. [DOI: 10.1080/00397911.2022.2087043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Venkateswarlu Chimaladenne
- Department of Chemistry, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Tadepalli, Guntur, Andhra Pradesh, India
- Chemistry Services, Aragen Life Sciences., IDA Mallapur, Hyderabad, Telangana, India
| | - Sri Rama Krishna Surapureddi
- Department of Chemistry, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Tadepalli, Guntur, Andhra Pradesh, India
| | - Krishna Reddy Valluru
- Chemistry Services, Aragen Life Sciences., IDA Mallapur, Hyderabad, Telangana, India
| | - Anil Kampli
- Chemistry Services, Aragen Life Sciences., IDA Mallapur, Hyderabad, Telangana, India
| | - Pradeep Kumar Brahman
- Department of Chemistry, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Tadepalli, Guntur, Andhra Pradesh, India
| | - Somarapu Vijaya Laxmi
- Department of Chemistry, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Tadepalli, Guntur, Andhra Pradesh, India
- Department of Chemistry, Palamuru University, Mahabubnagar, Telangana, India
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4
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Venkateswarlu S, Murty GN, Satyanarayana M, Siddaiah V. Design, synthesis, and biological activity studies of a new class of sulfonated aurones: First synthesis of acidoaurone isolated from
Phyllanthus acidus
. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | | | | | - Vidavalur Siddaiah
- Department of Organic Chemistry, School of Chemistry Andhra University Visakhapatnam India
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5
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Li P, Li S, Li G, Huang H. Synthesis of 2-Aryl-4 H-thiochromen-4-one Derivatives via a Cross-Coupling Reaction. ACS OMEGA 2021; 6:14655-14663. [PMID: 34124488 PMCID: PMC8190924 DOI: 10.1021/acsomega.1c01778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 05/11/2021] [Indexed: 05/07/2023]
Abstract
A concise and efficient cross-coupling synthetic strategy has been developed to construct 2-aryl-4H-thiochromen-4-one derivatives from 2-sulfinyl-thiochromones and arylboronic acids. This reaction proceeds via a catalyst system of Lewis acid and palladium(II) combined with XPhos as an optimal ligand in moderate to good yields. Besides, this flexible methodology provides a wide scope for the synthesis of different functionally substituted thiochromone scaffolds and can be further exploited to construct diverse thioflavone libraries for pharmaceutical research.
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Affiliation(s)
- Peng Li
- Beijing
Key Laboratory of Active Substance Discovery and Druggability Evaluation,
Institute of Materia Medica, Peking Union
Medical College and Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing 100050, P. R. China
- Chinese
Academy of Medical Sciences Key Laboratory of Anti-DR TB Innovative
Drug Research, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing 100050, P. R. China
| | - Shengnan Li
- Beijing
Key Laboratory of Active Substance Discovery and Druggability Evaluation,
Institute of Materia Medica, Peking Union
Medical College and Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing 100050, P. R. China
| | - Gang Li
- Beijing
Key Laboratory of Active Substance Discovery and Druggability Evaluation,
Institute of Materia Medica, Peking Union
Medical College and Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing 100050, P. R. China
- Chinese
Academy of Medical Sciences Key Laboratory of Anti-DR TB Innovative
Drug Research, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing 100050, P. R. China
| | - Haihong Huang
- Beijing
Key Laboratory of Active Substance Discovery and Druggability Evaluation,
Institute of Materia Medica, Peking Union
Medical College and Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing 100050, P. R. China
- Chinese
Academy of Medical Sciences Key Laboratory of Anti-DR TB Innovative
Drug Research, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing 100050, P. R. China
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