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Worayuthakarn R, Boontan K, Chainok K, Ruchirawat S, Thasana N. Base-Mediated and Silver-Catalyzed Divergent Synthesis of Hydroxynaphthalenamides and Phosphorylated Dihydronaphthylamides from Enone-Oxazolones. J Org Chem 2023; 88:16520-16538. [PMID: 37974421 DOI: 10.1021/acs.joc.3c01994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
An efficient divergent approach to functionalized naphthalene derivatives, the naphthalenamides, via base-mediated and silver-catalyzed cyclization has been developed using enone-oxazolones as the precursors. This protocol utilized base in methanol with heating to construct the corresponding hydroxynaphthalenamides 2 by a C-C bond formation, oxazolone ring-opening, and aromatization in good yields. On the other hand, phosphorylated dihydronaphthylamides 3 were generated by using H-phosphonate as the phosphonating reagent in a silver-catalyzed cyclization involving the phospha-1,4-addition/intramolecular ring closure with concomitant C-P/C-C bond formation in good yields.
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Affiliation(s)
- Rattana Worayuthakarn
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, Laksi, Bangkok 10210, Thailand
| | - Kanyanat Boontan
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, Laksi, Bangkok 10210, Thailand
| | - Kittipong Chainok
- Thammasat University Research Unit in Multifunctional Crystalline Materials and Applications (TU-MCMA), Faculty of Science and Technology, Thammasat University, Pathumthani 12121, Thailand
| | - Somsak Ruchirawat
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, Laksi, Bangkok 10210, Thailand
- Chemical Sciences Program, Chulabhorn Graduate Institute, Laksi, Bangkok 10210, Thailand
- Center of Excellence on Environmental Health and Toxicology (EHT), OPS, Ministry of Education, Science, Research and Innovation, Bangkok 10400, Thailand
| | - Nopporn Thasana
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, Laksi, Bangkok 10210, Thailand
- Chemical Sciences Program, Chulabhorn Graduate Institute, Laksi, Bangkok 10210, Thailand
- Center of Excellence on Environmental Health and Toxicology (EHT), OPS, Ministry of Education, Science, Research and Innovation, Bangkok 10400, Thailand
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2
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Jantrapirom J, Palavong N, Tummatorn J, Thongsornkleeb C, Ruchirawat S. Divergent synthesis of 3,4-dihydro-2 H-benzo[ h]chromen-2-one and fluorenone derivatives from ortho-alkynylarylketones. Org Biomol Chem 2023; 21:8888-8901. [PMID: 37902976 DOI: 10.1039/d3ob01492d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2023]
Abstract
Our research has led to the development of a divergent synthesis approach for the synthesis of 3,4-dihydro-2H-benzo[h]chromen-2-one 3 and fluorenone 9 derivatives using ortho-alkynylarylketones as common precursors. The synthesis of 3,4-dihydro-2H-benzo[h]chromen-2-ones 3 employed silver catalyzed ketonization to form polycarbonyl intermediates which underwent double intramolecular cyclization and decarboxylation to generate a lactone and a phenyl ring in a one-pot fashion. In addition, the same precursor could be used to prepare fluorenone derivatives 9 under acidic conditions. The reaction proceeded via the formation of indenone analogs, followed by the generation of the para-quinone methide intermediate and intramolecular cyclization to provide the corresponding products in good yields.
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Affiliation(s)
- Jantra Jantrapirom
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Nitwaree Palavong
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Jumreang Tummatorn
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.
| | - Charnsak Thongsornkleeb
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.
| | - Somsak Ruchirawat
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.
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3
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Mao Z, Zeng H. Gold-catalyzed synthesis of oxazoles from alkynyl triazenes and dioxazoles. RSC Adv 2022; 12:24857-24860. [PMID: 36128381 PMCID: PMC9428897 DOI: 10.1039/d2ra04559a] [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: 07/22/2022] [Accepted: 08/25/2022] [Indexed: 11/21/2022] Open
Abstract
A gold-catalyzed regioselective [3 + 2] cycloaddition of alkynyl triazenes with 1,2,4-dioxazoles was developed.
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Affiliation(s)
- Zhenjun Mao
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Hao Zeng
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
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