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Xanthonoid
A xanthonoid is a chemical natural phenolic compound formed from the xanthone backbone. Many members of the Clusiaceae The Clusiaceae or Guttiferae Juss. (1789) (''nom. alt. et cons.'' = alternative and valid name) are a family (biology), family of plants including 13 genera and ca 750 species. Several former members of Clusiacae are now placed in Calophyllaceae ... contain xanthonoids. Xanthonoid biosynthesis in cell cultures of '' Hypericum androsaemum'' involves the presence of a benzophenone synthase condensing a molecule of benzoyl-CoA with three malonyl-CoA yielding to 2,4,6-trihydroxybenzophenone. This intermediate is subsequently converted by a benzophenone 3′-hydroxylase, a cytochrome P450 monooxygenase, leading to the formation of 2,3′,4,6-tetrahydroxybenzophenone. Some examples are tomentonone, zeyloxanthonone and calozeyloxanthone isolated from the bark of '' Calophyllum tomentosum'', apetalinone A, B, C and D from '' Calophyllum apetalum'', gaud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mangiferin
Mangiferin is a glucosylxanthone (xanthonoid). This molecule is a glucoside of norathyriol. Natural occurrences Mangiferin was first isolated from the leaves and bark of ''Mangifera indica'' (the mango tree). It can also be extracted from mango peels and kernels, ''Iris unguicularis'', ''Anemarrhena asphodeloides'' rhizomes and ''Bombax ceiba'' leaves. It is also found in the genera ''Salacia (plant), Salacia'' and ''Cyclopia (plant), Cyclopia'', as well as in coffee leaves and some species of ''Crocus''. Among the group of ''Asplenium hybrids'' known as the "Appalachian ''Asplenium'' complex", mangiferin and isomangiferin are produced only by ''Asplenium montanum'' and its hybrid descendants. The distinctive gold-orange fluorescence of these compounds under ultraviolet light has been used to aid in the chromatographic identification of hybrid ''Asplenium''s. Research Preliminary research is conducted on the potential biological properties of mangiferin, although there were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xanthone
Xanthone is an organic compound with the molecular formula C13H8O2. It is a white solid. In 1939, xanthone was introduced as an insecticide and it currently finds uses as ovicide for codling moth eggs and as a larvicide. Xanthone is also used in the preparation of xanthydrol, which is used in the determination of urea levels in the blood. It can also be used as a photocatalyst. Synthesis Xanthone can be prepared by the heating of phenyl salicylate: Six methods have been reported for synthesizing xanthone derivatives: *The Michael-Kostanecki method uses an equimolar mix of a polyphenol and an ''O''-hydroxybenzoic acid, which are heated with a dehydrating agent. *The Friedel-Crafts method has a benzophenone intermediate. *The Robinson-Nishikawa method is a variant of the Hoesch synthesis but with low yields. *The Asahina-Tanase method synthesizes some methoxylated xanthones, and xanthones with acid-sensitive substituents. *The Tanase method is used to synthesize po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benzoyl-CoA
Benzoyl-CoA is the thioester derived from benzoic acid and coenzyme A. The term benzoyl-CoA also include diverse conjugates of coenzyme A and aromatic carboxylic acids. Benzoate, vanillin, anthranilic acid, 4-ethylphenol, p-cresol, phenol, aniline, terephthalic acid, phenylalanine.html" ;"title="-hydroxybenzoic acid, and phenylalanine">-hydroxybenzoic acid, and phenylalanine are all metabolized to benzoyl-CoA. Additionally, cinnamic acid, p-coumaric acid, ferulic acid, toluene, caffeic acid, benzyl alcohol, and mandelic acid are suspected to be processed similarly. As substrate for reductases Benzoyl-CoA is a substrate for diverse reductases: 4-hydroxybenzoyl-CoA reductase, benzoyl-CoA reductase, benzoyl-CoA 3-monooxygenase, benzoate-CoA ligase, 2alpha-hydroxytaxane 2-O-benzoyltransferase, anthranilate N-benzoyltransferase, biphenyl synthase, glycine N-benzoyltransferase, ornithine N-benzoyltransferase and phenylglyoxylate dehydrogenase (acylating). Benzoyl-Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
