78045-74-6

Upstream product

• 27305-54-0 8,8-Dimethyl-2-phenyl-7,8-dihydro-6H-pyrano[3,2-g]chromen-4-one 
• 31273-58-2 1-(7-hydroxy-2,2-dimethylchroman-6-yl)ethanone 
• 115-18-4 2-methyl-3-buten-2-ol 
• 82448-50-8 6-(2'-Benzoylacetyl)-3,4-dihydro-7-hydroxy-2,2-dimethyl-2H-1-benzopyran 
• 82448-49-5 6-Acetyl-7-benzoyloxy-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran 
• 6515-36-2 7-hydroxy-2-phenyl-chroman-4-one 
• 866141-85-7 7-hydroxy-6-C-prenylflavanone 
• 6665-86-7 7-hydroxyflavone 
• 82448-48-4 8-Iodo-7-(1,1-dimethylprop-2-ynyloxy)-2-phenyl-4H-1-benzopyran-4-one 
• 143886-01-5 6,6-dimethylpyrano<2,3:7,6>flavanone 

Relevant academic research and scientific papers

A Facile Synthesis of Isopongaflavone, Atalantoflavone Dimethylether, Racemoflavone Dimethylether and their Analogues

A convenient route to pyranoflavones (natural and synthetic) from acetyl hydroxy chroman via the corresponding analogues by the use of Claisen condensation in the key step is reported.Keywords: 2-Aryl-8,8-dimethyl-6,7-dihydro-4H,8H-benzodipy

New Route for Synthesis of Linear Pyranoflavones

A convenient synthesis of linear pyranoflavone, viz 2,2-dimethyl-8-phenyl-2H,6H-benzodipyran-6-one(III) is described.The key steps in the synthesis of the title compounds are : (i) blocking the 8-position of appropriate 7-hydroxyflavone with

New Syntheses of Ovaliflavanone-A, Ovaliflavanone-B and Ovalichromene-B

Nuclear prenylation of 7-hydroxyflavanone using 2-methyl-but-3-en-2-ol in the presence of BF3-etherate yields ovaliflavanone-A (II), ovaliflavanone-B (V), 7-hydroxy-6-C-prenylflavanone (IV) and 7-(γ,γ-dimethylallyloxy)-flavanone (III).Nuclear prenylation of 7-hydroxy-3',4'-methylenedioxyflavanone has earlier been shown to yield four products, viz.XI, XII, XIII and XIV.One of them, viz. 7-hydroxy-3',4'-methylenedioxy-8-C-prenylflavanone (XIV) with DDQ furnishes ovalichromene-B (XV).Some of the prenylated compounds from the above flavanones when subjected to DDQ treatment furnish new chromenoflavanones, chromenoflavones and isolonchocarpin.