86978-02-1

Basic information

• Product Name: 1,3-Propanedione, 1-(3,4-dihydro-7-hydroxy-5-methoxy-2,2-dimethyl-2H-1-benzopyran-8-yl )-3-(4-methoxyphenyl)-
• CAS NO: 86978-02-1
• Molecular Formula: C22H24O6
• Molecular Weight: 384.429
• Mol File: 86978-02-1.mol

Chemical Properties

• CAS DataBase Reference: 1,3-Propanedione, 1-(3,4-dihydro-7-hydroxy-5-methoxy-2,2-dimethyl-2H-1-benzopyran-8-yl )-3-(4-methoxyphenyl)-(CAS DataBase Reference)
• NIST Chemistry Reference: 1,3-Propanedione, 1-(3,4-dihydro-7-hydroxy-5-methoxy-2,2-dimethyl-2H-1-benzopyran-8-yl )-3-(4-methoxyphenyl)-(86978-02-1)
• EPA Substance Registry System: 1,3-Propanedione, 1-(3,4-dihydro-7-hydroxy-5-methoxy-2,2-dimethyl-2H-1-benzopyran-8-yl )-3-(4-methoxyphenyl)-(86978-02-1)

Safety Data

• Hazardous Substances Data: 86978-02-1(Hazardous Substances Data)

Upstream product

• 86978-01-0 4-Methoxy-benzoic acid 8-acetyl-5-methoxy-2,2-dimethyl-chroman-7-yl ester 
• 4655-89-4 8-Acetyl-7-hydroxy-5-methoxy-3,4-dihydro-2,2-dimethyl-2H-<1>benzopyran 
• 68634-30-0 5-methoxy-8-(4-methoxy-phenyl)-2,2-dimethyl-3,4-dihydro-2H-pyrano[2,3-f]chromen-10-one 

Downstream Products

• 68634-30-0 5-methoxy-8-(4-methoxy-phenyl)-2,2-dimethyl-3,4-dihydro-2H-pyrano[2,3-f]chromen-10-one 
• 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 
• 55929-10-7 5,9-dimethoxy-8-(4-methoxy-phenyl)-2,2-dimethyl-3,4-dihydro-2H-pyrano[2,3-f]chromen-10-one 
• 89024-10-2 5,9-Dimethoxy-8(4'-methoxyphenyl)-2,2-dimethyl-2H,10H-benzo<1,2-b:3,4-b'>dipyran-10-one 

Relevant articles and documents

Baker-Venkataraman Rearrangement of o-Aroyloxyacetyldihydrobenzopyrans - Synthesis of 3,4-Dihydro-2,2-dimethyl-2H-pyranoflavones

Reactions of 6-acetyl-7-hydroxy-3,4-dihydro-2,2-dimethyl-2H-benzopyran (I) and 8-acetyl-7-hydroxy-5-methoxy-3,4-dihydro-2,2-dimethyl-2H-benzopyran (II) with 4-methoxybenzoyl chloride and 3,4-methylenedioxybenzoyl chloride give the respective o-aroyloxyacetyldihydrobenzopyrans (III, VI, IX and XII).These on Baker-Venkataraman rearrangement in the presence of pyridine and KOH afford the diaroylmethanes (IV, VII, X and XIII), which undergo cyclisation in the presence of glacial acetic acid and fused sodium acetate to the corresponding dihydropyranoflavones (V, VIII, XI and XIV).