4670-29-5

Basic information

• Product Name: 5-Hydroxy-2,8,8-trimethyl-4H,8H-benzo[1,2-b:3,4-b']dipyran-4-one
• Synonyms: 5-Hydroxy-2,8,8-trimethyl-4H,8H-benzo[1,2-b:3,4-b']dipyran-4-one;Allopteroxylin
• CAS NO: 4670-29-5
• Molecular Formula: C15H14O4
• Molecular Weight: 258.26926
• Mol File: 4670-29-5.mol
• Article Data: 3

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 5-Hydroxy-2,8,8-trimethyl-4H,8H-benzo[1,2-b:3,4-b']dipyran-4-one(CAS DataBase Reference)
• NIST Chemistry Reference: 5-Hydroxy-2,8,8-trimethyl-4H,8H-benzo[1,2-b:3,4-b']dipyran-4-one(4670-29-5)
• EPA Substance Registry System: 5-Hydroxy-2,8,8-trimethyl-4H,8H-benzo[1,2-b:3,4-b']dipyran-4-one(4670-29-5)

Safety Data

• Hazardous Substances Data: 4670-29-5(Hazardous Substances Data)

Usage

Also known as

6-hydroxy-5,7,4'-trimethylflavone

Upstream product

• 1111-97-3 3-chloro-3-methylbut-1-yne 
• 1013-69-0 eugenin 
• 35930-31-5 Alloptaeroxylin methyl ether 
• 31273-62-8 7-(1,1-dimethyl-prop-2-ynyloxy)-5-hydroxy-2-methyl-chromen-4-one 
• 126444-80-2 6-Acetyl-5-acetyloxy-7-methoxy-2,2-dimethyl-2H-chroman 
• 126444-81-3 1-(5-Hydroxy-7-methoxy-2,2-dimethyl-chroman-6-yl)-butane-1,3-dione 
• 54303-77-4 5-methoxy-2,8,8-trimethyl-9,10-dihydro-4H,8H-benzo<1,2-b:5,6-b'>dipyran-4-one 
• 24128-11-8 6-Acetyl-5,7-dihydroxy-3,4-dihydro-2,2-dimethyl-2H-<1>benzopyran 
• 13476-24-9 Isoheteropeucenin 
• 32550-59-7 6-Acetyl-5-hydroxy-7-methoxy-3,4-dihydro-2,2-dimethyl-2H<1>benzopyran 

Downstream Products

• 34411-93-3 spatheliabischromene 
• 35930-31-5 Alloptaeroxylin methyl ether 
• 27305-38-0 alloptaeroxylin acetate 
• 29507-75-3 spatheliachromen 

Relevant articles and documents

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A Study of the Base-catalysed Wessely-Moser Rearrangement of Angularly Condensed 2,2-Dimethyl-2H-pyrano Derivatives of 5-Hydroxy-2-methylchromones and 2,3-Diphenylchromones and related 1-Hydroxyxanthone

2-Methyl group in 5-hydroxy-2,8,8-trimethyl-8H-pyranochromone (4a) does not hinder base-catalysed isomerisation to afford the corresponding linear isomer (5a); whereas the presence of of phenyl group in position 2 and 3 as in 4c brings no such change.Similarly, 6-hydroxy-3,3-dimethyl-3H-pyranoxanthone (8) does not undergo alkali isomerisation. 5,7-Dihydroxy-2-methylchromone (2a) with 2-chloro-2-methyl-3-butyne in the presence of K2CO3, KI and DMF yields both the linear and angular 2,2-dimethyl-2H-pyrano derivatives (5a and 4a respectively) besides the 1,1-dimethylpropargyl ether (3a), the ratio being 2:4:3.However, under similar conditions 5,7-dihydroxy-2,3-diphenylchromone (2b) yields 3b, 4c and 5c in the ratio of only 5:14:1; again the tendency of forming linear isomer (5c) is far less than that of the angular isomer (4c).