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Alvi S, Jayant V, Ali R. Applications of Oxone® in Organic Synthesis: An Emerging Green Reagent of Modern Era. ChemistrySelect 2022. [DOI: 10.1002/slct.202200704] [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)
- Shakeel Alvi
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, Okhla New Delhi 110025 India
| | - Vikrant Jayant
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, Okhla New Delhi 110025 India
| | - Rashid Ali
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, Okhla New Delhi 110025 India
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Li J, Wang K, Wu J, Zhang H, Chen Y, Liu Q, Xu J, Yi W. Elemental Sulfur‐Promoted Synthesis of 4‐Hydroxybenzophenones from
p
‐Quinone Methides under Metal‐Free Condition. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200158] [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)
- Jingping Li
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Kunpeng Wang
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Jiayi Wu
- Shanghai Ganquan Foreign Languages Middle School 200065 Shanghai P. R. China
| | - Haoxiang Zhang
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Yan Chen
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Qinglei Liu
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Junju Xu
- College of Tabacco Science Yunnan Agricultural University Key Laboratory of Sustainable Utilization of Plateau Characteristic Spice Plant Resources Education Department of Yunnan Province 650201 Kunming P. R. China
| | - Weiyin Yi
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
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Phumjan T, Songthammawat P, Jongcharoenkamol J, Batsomboon P, Ruchirawat S, Ploypradith P. Substituted 9-Anthraldehydes from Dibenzocycloheptanol Epoxides via Acid-Catalyzed Epoxide Opening/Semipinacol Rearrangement. J Org Chem 2021; 86:13322-13349. [PMID: 34415157 DOI: 10.1021/acs.joc.1c01405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Starting from benzaldehyde derivatives, the corresponding dibenzocycloheptenol could be prepared in five steps. Under both substrate (secondary vs tertiary alcohol and the substituents on the aromatic ring(s)) and condition control, the subsequent epoxidation and acid-catalyzed epoxide opening/semipinacol rearrangement/aromatization afforded the corresponding 9-anthraldehydes in good yields, up to 88% over two steps. The presence of the electron-withdrawing group(s) on the aromatic ring(s) suppressed the rate of the epoxidation while the subsequent semipinacol rearrangement step required heating; the presence of the electron-donating group(s), on the other hand, frequently led to the decomposition during the epoxidation. From the mechanistic studies, the semipinacol rearrangement of the epoxide could precede the ionization at the bisbenzylic position, yielding the aldehyde intermediate. The ensuing dehydrative aromatization led to the formation of 9-anthraldehyde. Conversely, nucleophilic addition to the aldehyde and dehydrative aromatization with concomitant loss of formic acid led to anthracene.
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Affiliation(s)
- Tanawat Phumjan
- Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, 906 Khamphaeng Phet 6 Road, Laksi, Bangkok 10210, Thailand
| | - Poramate Songthammawat
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6 Road, Laksi, Bangkok, Thailand 10210
| | - Jira Jongcharoenkamol
- Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, 906 Khamphaeng Phet 6 Road, Laksi, Bangkok 10210, Thailand
| | - Paratchata Batsomboon
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6 Road, Laksi, Bangkok, Thailand 10210
| | - Somsak Ruchirawat
- Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, 906 Khamphaeng Phet 6 Road, Laksi, Bangkok 10210, Thailand.,Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6 Road, Laksi, Bangkok, Thailand 10210.,Centre of Excellence on Environmental Health and Toxicology, Ministry of Education, Bangkok 10400, Thailand
| | - Poonsakdi Ploypradith
- Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, 906 Khamphaeng Phet 6 Road, Laksi, Bangkok 10210, Thailand.,Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6 Road, Laksi, Bangkok, Thailand 10210.,Centre of Excellence on Environmental Health and Toxicology, Ministry of Education, Bangkok 10400, Thailand
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Chen HW, Song QH. Regioselective benzoyloxylative dearomatization of naphthols by benzoyl peroxide under catalyst-free conditions. Org Biomol Chem 2021; 19:7161-7164. [PMID: 34378620 DOI: 10.1039/d1ob01274f] [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
A direct regioselective benzoyloxylative dearomatization of both α- and β-naphthols by benzoyl peroxide under an air atmosphere, and radical inhibitor- and catalyst-free conditions at room temperature is described. The methodology provides a new efficient strategy for the construction of α-ketol derivatives bearing an oxo-quaternary carbon center from naphthols with good to excellent yields.
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Affiliation(s)
- Hong-Wei Chen
- Hefei National Laboratory for Physical Sciences at Microscale & Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
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Urbano A, Vallejo S, Cabrera-Afonso MJ, Yonte E. Chirality Transfer from the Oxidative Dearomatization of Axially Chiral Binols with Oxone under Mild Conditions. Org Lett 2020; 22:6122-6126. [DOI: 10.1021/acs.orglett.0c02194] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Antonio Urbano
- Departamento de Quı́mica Orgánica, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), UAM, 28049 Madrid, Spain
| | - Sara Vallejo
- Departamento de Quı́mica Orgánica, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - María J. Cabrera-Afonso
- Departamento de Quı́mica Orgánica, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - Elena Yonte
- Departamento de Quı́mica Orgánica, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
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