89024-10-2

Upstream product

• 88055-39-4 9-Hydroxy-8-(4'-methoxyphenyl)-5-methoxy-2,2-dimethyl-3,4-dihydro-2H,10H-benzo<1,2-b:3,4-b'>dipyran-10-one 
• 86978-02-1 1-(7-Hydroxy-5-methoxy-2,2-dimethyl-chroman-8-yl)-3-(4-methoxy-phenyl)-propane-1,3-dione 
• 55929-10-7 5,9-dimethoxy-8-(4-methoxy-phenyl)-2,2-dimethyl-3,4-dihydro-2H-pyrano[2,3-f]chromen-10-one 

Relevant academic research and scientific papers

Performic Acid Oxidation of Dihydro-o-hydroxyaroylacetylbenzopyrans: A New Synthesis of Dihydropyranoflavonols and Their Dehydro Analogues

Performic acid oxidation of dihydro-o-hydroxyaroylacetylbenzopyrans (Ia-c and Va-c) in chloroform gives the dihydropyranoflavonols (IIa-c and VIa-c respectively).Methylation of IIa-b and VIa-b with dimethyl sulphate and aqueous sodium carbonate affords the corresponding dihydropyranomethoxyflavones (IIIa-b and VIIa-b) and benzylic bromination of IIIa-b and VIIa-b with N-bromosuccinimide followed by dehydrobromination with pyridine, affords the pyranomethoxyflavones (IVa-b and VIIIa-b respectively).