algerian journal of environmental science and technology
Volume 3, Numéro 2, Pages 63-67
2017-06-30
Authors : Benferrah N . Hammadi M . Dokari H . Berthiol F .
The Thiele–Winter reaction is of interest for synthesis of tetracetoxyaromatic precursors of hydroxynaphtoquinones. Solid acids such as Tungstosilicic acid (H4SiW12O40) have an efficient catalyst in acetoxylation reaction of naphtoquinones without the use of organic solvent at room temperature. 1,2,3,4-Tetrahydroxynaphthalene was easily oxidized at room temperature in 2,3-Dihydroxynaphthoquinone by using (Pc[Co]/K10) and air (1 atm). We have also tested this type of reaction in 2-hydroxynaphthoquinone (Lawsone). Many naphthoquinones are natural products with interesting biological properties.
Heteropolyacids ; Without solvent ; Room temperature ; Lawsone ; Catalytic system (Pc[Co]/K10) ; 2,3-dihydroxynaphthoquinone
Fandougouma Omar
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Belboukhari Nasser
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Cheikh Naoual
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Villemin Didier
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Cheriti Abdelkrim
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pages 103-120.
Bayou-khier N.
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Amari M.
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Fodili M.
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Grau S.g.
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Hoffmann P.
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pages 945-955.
Fandougouma Omar
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pages 103-120.
Nsiba Mohamed Faouzi
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Saafia Samira
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Rayesa Ali
.
Houasa Ammar
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pages 107-117.
Rebiai Abdelkerim
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Lanez Touhami
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Belfar Mohamed Lakhder
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pages 190-197.