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Anti-leukemia activity of semi-synthetic phenolic derivatives from Polygonum limbatum Meisn.

Nkuété AH, Kuete V, Gozzini D, Migliolo L, Oliveira AL, Wabo HK, Tane P, Vidari G, Efferth T, Franco OL - Chem Cent J (2015)

Bottom Line: We describe in the present paper four new semi-synthetic derivatives of A and B: 5-hydroxy-6-methoxy-7-O-(3'-methylbut-2'-enyl)chroman-4-one (1), trivially named metapchromone, 5-acetoxy-6-methoxy-7-O-[3'-methylbut-2'enyl]chroman-4-one (2), trivially named sargisin, 2'-hydroxy-3',6'-dimethoxy-4'-O-(3″-methylbut-2″-enyl)chalcone (3) trivially named limbachalcone A, and 2'-acetoxy-3',6'-dimethoxy-4'-O-(3″-methylbut-2″-enyl)chalcone (4) trivially named tsedengchalcone.The study clearly suggests that semi-synthesis involving O-prenylation and acetylation of chalcones or other chromanones should be avoided in a search for anticancer drugs.This conclusion should be helpful when selecting substituents for the synthesis of potential anticancer drugs.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon ; Centro de Analises Proteômicas e Bioquimicas, Pós-Graduação em Ciencias Genomicas e Biotecnologia, Universidade Catolica de Brasilia, Brasilia, DF Brazil ; Dipartimento di Chimica, Laboratorio di Chimica delle Sostanze Organiche Naturali e Centro di Etnobiofarmacia (CISTRE), Università degli Studi di Pavia, Via Taramelli, 12-27100 Pavia, Italy.

ABSTRACT

Background: The present report describes the semi-synthesis of a few O-prenylated phenolic derivatives and their in vitro antitumor activities. These compounds were prepared by modifying two naturally occurring antitumor phenols, 5,7-dihydroxy-3-(1'-hydroxy-1'-phenyl-methyl)-6-methoxy-chroman-4-one (A) and 2',4'-dihydroxy-3',6'-dimethoxychalcone (B), previously isolated from Polygonum limbatum Meisn. (Polygonaceae). The structures were elucidated by spectroscopic means and comparison with published data. The cytotoxicity of compounds was determined by using the resazurin assay in the parental drug-sensitive CCRF-CEM cell line and its multidrug-resistant P-glycoprotein-over-expressing subline, CEM/ADR5000.

Results: We describe in the present paper four new semi-synthetic derivatives of A and B: 5-hydroxy-6-methoxy-7-O-(3'-methylbut-2'-enyl)chroman-4-one (1), trivially named metapchromone, 5-acetoxy-6-methoxy-7-O-[3'-methylbut-2'enyl]chroman-4-one (2), trivially named sargisin, 2'-hydroxy-3',6'-dimethoxy-4'-O-(3″-methylbut-2″-enyl)chalcone (3) trivially named limbachalcone A, and 2'-acetoxy-3',6'-dimethoxy-4'-O-(3″-methylbut-2″-enyl)chalcone (4) trivially named tsedengchalcone. Their preliminary cytotoxic activities have been determined. We also report herein the isolation of 1-methylhydantoin (C) and betulinic acid (D) from Polygonum limbatum for the first time.

Conclusions: The study clearly suggests that semi-synthesis involving O-prenylation and acetylation of chalcones or other chromanones should be avoided in a search for anticancer drugs. This conclusion should be helpful when selecting substituents for the synthesis of potential anticancer drugs.

No MeSH data available.


Chemical structures of compounds
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Fig5: Chemical structures of compounds

Mentions: We previously reported the isolation of 5,7-dihydroxy-3-(1′-hydroxy-1′-phenyl-methyl)-6-methoxy-chroman-4-one (A) and 2′,4′-dihydroxy-3′,6′-dimethoxychalcone (B) from the crude extract of P. limbatum [3]. A re-isolation of the compounds was performed following our previously described procedure [3] with some modifications that allowed the isolation of other flavonoids, 1-methylhydantoin (C) and terpenoids. A portion of the MeOH extract (7 g) was submitted to separation by column chromatography and HPLC, affording compounds C, D and E (Fig. 5).Fig. 5


Anti-leukemia activity of semi-synthetic phenolic derivatives from Polygonum limbatum Meisn.

Nkuété AH, Kuete V, Gozzini D, Migliolo L, Oliveira AL, Wabo HK, Tane P, Vidari G, Efferth T, Franco OL - Chem Cent J (2015)

Chemical structures of compounds
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4493792&req=5

Fig5: Chemical structures of compounds
Mentions: We previously reported the isolation of 5,7-dihydroxy-3-(1′-hydroxy-1′-phenyl-methyl)-6-methoxy-chroman-4-one (A) and 2′,4′-dihydroxy-3′,6′-dimethoxychalcone (B) from the crude extract of P. limbatum [3]. A re-isolation of the compounds was performed following our previously described procedure [3] with some modifications that allowed the isolation of other flavonoids, 1-methylhydantoin (C) and terpenoids. A portion of the MeOH extract (7 g) was submitted to separation by column chromatography and HPLC, affording compounds C, D and E (Fig. 5).Fig. 5

Bottom Line: We describe in the present paper four new semi-synthetic derivatives of A and B: 5-hydroxy-6-methoxy-7-O-(3'-methylbut-2'-enyl)chroman-4-one (1), trivially named metapchromone, 5-acetoxy-6-methoxy-7-O-[3'-methylbut-2'enyl]chroman-4-one (2), trivially named sargisin, 2'-hydroxy-3',6'-dimethoxy-4'-O-(3″-methylbut-2″-enyl)chalcone (3) trivially named limbachalcone A, and 2'-acetoxy-3',6'-dimethoxy-4'-O-(3″-methylbut-2″-enyl)chalcone (4) trivially named tsedengchalcone.The study clearly suggests that semi-synthesis involving O-prenylation and acetylation of chalcones or other chromanones should be avoided in a search for anticancer drugs.This conclusion should be helpful when selecting substituents for the synthesis of potential anticancer drugs.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon ; Centro de Analises Proteômicas e Bioquimicas, Pós-Graduação em Ciencias Genomicas e Biotecnologia, Universidade Catolica de Brasilia, Brasilia, DF Brazil ; Dipartimento di Chimica, Laboratorio di Chimica delle Sostanze Organiche Naturali e Centro di Etnobiofarmacia (CISTRE), Università degli Studi di Pavia, Via Taramelli, 12-27100 Pavia, Italy.

ABSTRACT

Background: The present report describes the semi-synthesis of a few O-prenylated phenolic derivatives and their in vitro antitumor activities. These compounds were prepared by modifying two naturally occurring antitumor phenols, 5,7-dihydroxy-3-(1'-hydroxy-1'-phenyl-methyl)-6-methoxy-chroman-4-one (A) and 2',4'-dihydroxy-3',6'-dimethoxychalcone (B), previously isolated from Polygonum limbatum Meisn. (Polygonaceae). The structures were elucidated by spectroscopic means and comparison with published data. The cytotoxicity of compounds was determined by using the resazurin assay in the parental drug-sensitive CCRF-CEM cell line and its multidrug-resistant P-glycoprotein-over-expressing subline, CEM/ADR5000.

Results: We describe in the present paper four new semi-synthetic derivatives of A and B: 5-hydroxy-6-methoxy-7-O-(3'-methylbut-2'-enyl)chroman-4-one (1), trivially named metapchromone, 5-acetoxy-6-methoxy-7-O-[3'-methylbut-2'enyl]chroman-4-one (2), trivially named sargisin, 2'-hydroxy-3',6'-dimethoxy-4'-O-(3″-methylbut-2″-enyl)chalcone (3) trivially named limbachalcone A, and 2'-acetoxy-3',6'-dimethoxy-4'-O-(3″-methylbut-2″-enyl)chalcone (4) trivially named tsedengchalcone. Their preliminary cytotoxic activities have been determined. We also report herein the isolation of 1-methylhydantoin (C) and betulinic acid (D) from Polygonum limbatum for the first time.

Conclusions: The study clearly suggests that semi-synthesis involving O-prenylation and acetylation of chalcones or other chromanones should be avoided in a search for anticancer drugs. This conclusion should be helpful when selecting substituents for the synthesis of potential anticancer drugs.

No MeSH data available.