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Marques EDJ, Ferraz CG, dos Santos IB, dos Santos II, El-Bachá RS, Ribeiro PR, Cruz FG. Chemical constituents isolated from Clusia criuva subsp. Criuva and their chemophenetics significance. BIOCHEM SYST ECOL 2021. [DOI: 10.1016/j.bse.2021.104293] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ferraz CG, Silva MDC, Pereira DA, Caldas BV, Mattos R, Oliveira VV, Andrade EM, Soares AC, da Silva F, Cruz FG, Ribeiro PR. Polyprenylated benzophenone derivatives from Clusia burle-marxii and their chemotaxonomic significance. BIOCHEM SYST ECOL 2021. [DOI: 10.1016/j.bse.2020.104218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Ferraz CG, Ribeiro PR, Mendonça R, Silveira ER, Cruz FG. Novel polyprenylated benzophenone derivatives from Clusia burle-marxii. Fitoterapia 2020; 149:104760. [PMID: 33075410 DOI: 10.1016/j.fitote.2020.104760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 10/07/2020] [Accepted: 10/12/2020] [Indexed: 01/12/2023]
Abstract
Three new caged polyprenylated benzophenone derivatives named burlemarxiones D-F (1-3) were isolated from the hexane extract of Clusia burle-marxii trunks. Burlemarxione D (1) contains the tetracyclo[8.3.1.03,11.05,10]tetradecane core skeleton also observed for burlemarxione A, its probable immediate precursor. However, two additional rings are formed to produce an unprecedented complex-caged core skeleton. These additional rings could be formed by a radical cyclization reaction of one prenyl group at C-5 with C-1 and C-33, followed by oxidative dehydrogenation (rearomatization) or by an intramolecular [4 + 2] radical cycloaddition (Diels-Alder reaction), followed by an enolization reaction (rearomatization). Burlemarxiones E and F were isolated after methylation with diazomethane that was necessary to avoid the interconversion of the pair of β-diketones in tautomeric equilibrium. The proposed biosynthetic pathway for burlemarxiones D-F involves the condensation of either lavandulyl pyrophosphate or 2-(1-methylvinyl)-hexa-5-enyl pyrophosphate with the acylphloroglucinol derivative 6-benzoyl-5-hydroxy-5-cyclohexen-1,3-dione, followed by consecutive prenylation reactions. Therefore, Clusia burle-marxii reinforces the claim that the genus Clusia is an important source of sophisticated caged polyprenylated benzophenone derivatives.
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Affiliation(s)
- Caline G Ferraz
- Grupo de Estudos de Substâncias Naturais Orgânicas, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo s/n, 40170-115 Salvador, Brazil; Metabolomics Research Group, Departamento de Química Orgânica, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo s/n, 40170-115 Salvador, Brazil.
| | - Paulo R Ribeiro
- Grupo de Estudos de Substâncias Naturais Orgânicas, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo s/n, 40170-115 Salvador, Brazil; Metabolomics Research Group, Departamento de Química Orgânica, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo s/n, 40170-115 Salvador, Brazil
| | - Renata Mendonça
- Instituto de Química, Universidade Federal do Rio Grande do Norte, CP 1524, 59072-970 Natal, RN, Brazil
| | - Edilberto R Silveira
- Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, 60021-940 Fortaleza, CE, Brazil
| | - Frederico G Cruz
- Grupo de Estudos de Substâncias Naturais Orgânicas, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo s/n, 40170-115 Salvador, Brazil
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Hill RA, Sutherland A. Hot off the Press. Nat Prod Rep 2019. [DOI: 10.1039/c9np90045d] [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 personal selection of 32 recent papers is presented covering various aspects of current developments in bioorganic chemistry and novel natural products such as burlemarxione A from Clusia burle-marxii.
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