866141-85-7Relevant academic research and scientific papers
PROCESSES FOR THE PREPARATION OF ORTHO-ALLYLATED HYDROXY ARYL COMPOUNDS
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Paragraph 00348; 00382, (2021/12/08)
The present application describes process for preparing an ortho-allylated hydroxy aryl compounds such as compounds of Formula (I) by reacting an allylic alcohol with a hydroxy aryl compound in the presence of aluminum compound selected from alumina and aluminum alkoxides and in a non-protic solvent wherein at least one carbon atom ortho to the hydroxy group in the hydroxy aryl compound is unsubstituted. The present application also includes compounds of Formula (I).
New Syntheses of Ovaliflavanone-A, Ovaliflavanone-B and Ovalichromene-B
Islam, Azizul,Gupta, Rajinder K.,Krishnamurti, M.
, p. 21 - 22 (2007/10/02)
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.
