33845-34-0

Basic information

• Product Name: 5-hydroxy-2,2,8-trimethyl-10-(3-methylbut-2-en-1-yl)-2H,6H-pyrano[3,2-g]chromen-6-one
• CAS NO: 33845-34-0
• Molecular Formula: C₂₀H₂₂O₄
• Molecular Weight: 326.3863
• Mol File: 33845-34-0.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 501.4°C at 760 mmHg
• Flash Point: 177.8°C
• Density: 1.17g/cm³
• Vapor Pressure: 1.12E-10mmHg at 25°C
• Refractive Index: 1.576
• CAS DataBase Reference: 5-hydroxy-2,2,8-trimethyl-10-(3-methylbut-2-en-1-yl)-2H,6H-pyrano[3,2-g]chromen-6-one(CAS DataBase Reference)
• NIST Chemistry Reference: 5-hydroxy-2,2,8-trimethyl-10-(3-methylbut-2-en-1-yl)-2H,6H-pyrano[3,2-g]chromen-6-one(33845-34-0)
• EPA Substance Registry System: 5-hydroxy-2,2,8-trimethyl-10-(3-methylbut-2-en-1-yl)-2H,6H-pyrano[3,2-g]chromen-6-one(33845-34-0)

Safety Data

• Hazardous Substances Data: 33845-34-0(Hazardous Substances Data)

Upstream product

• 29507-75-3 spatheliachromen 
• 115-18-4 2-methyl-3-buten-2-ol 
• 24672-78-4 pulverin 
• 1013-69-0 eugenin 
• 578-72-3 5,7-dihydroxy-2-methyl-6-(3-methyl-2-buten-1-yl)-4H-1-benzopyran-4-one 

Relevant articles and documents

Studies in Pyranomethylchromones and Prenylated Pyranomethylchromones

5,7-Dihydroxy-2-methylchromone (I) on prenylation with 2-methyl-3-buten-2-ol in the presence of BF3 etherate yields pulverin (II) and peucenin (III), which are separable by column chromatography.Cyclodehydrogenation of II with DDQ in benzene under reflux for 6 hr affords 6-(3,3-dimethylallyl)alloptaeroxylin (IV) and 10-(3,3-dimethylallyl)spatheliachromene (V) while prolonged refluxing (70 hr) yields in addition to IV and V, the bispyranochromone (VI) identified as spatheliabischromene.Pyranochromones IV, V and VI have also been synthesised by alternative routes.Alloptaeroxylin (VII) on prenylation with 2-methyl-3-buten-2-ol in the pres ence of BF3 etherate gives IV.Compound III undergoes cyclodehydrogenation with DDQ to give spatheliachromene (VIII) which on prenylation affords V.Acid-catalysed cyclisation of IV followed by NBS/DDQ dehydrogenation of the resultant dihydrodipyranochromone (IX) furnishes VI.