51154-08-6

Basic information

• Product Name: (2R,3S)-2-(3,4-dimethoxyphenyl)-3,5,7-trimethoxy-3,4-dihydro-2H-chromene
• CAS NO: 51154-08-6
• Molecular Formula: C₂₀H₂₄O₆
• Molecular Weight: 360.401
• Mol File: 51154-08-6.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 494.3°C at 760 mmHg
• Flash Point: 201.7°C
• Density: 1.2g/cm³
• Vapor Pressure: 1.99E-09mmHg at 25°C
• Refractive Index: 1.563
• CAS DataBase Reference: (2R,3S)-2-(3,4-dimethoxyphenyl)-3,5,7-trimethoxy-3,4-dihydro-2H-chromene(CAS DataBase Reference)
• NIST Chemistry Reference: (2R,3S)-2-(3,4-dimethoxyphenyl)-3,5,7-trimethoxy-3,4-dihydro-2H-chromene(51154-08-6)
• EPA Substance Registry System: (2R,3S)-2-(3,4-dimethoxyphenyl)-3,5,7-trimethoxy-3,4-dihydro-2H-chromene(51154-08-6)

Safety Data

• Hazardous Substances Data: 51154-08-6(Hazardous Substances Data)

Upstream product

• 77-78-1 dimethyl sulfate 
• 64-17-5 ethanol 
• 154-23-4 catechin 
• 1247-97-8 pentamethyl quercetin 
• 64-19-7 acetic acid 
• 51079-25-5 (2R,3S)-(+)-catechin 3',4',5,7-tetramethyl ether 
• 74-88-4 methyl iodide 
• 19611-22-4 (+/-)-3',4',5,7-tetra-O-methylcatechin 
• 16198-01-9 (+/-)-pentaacetylcatechin 
• 64349-50-4 2-(3,4-dimethoxy-phenyl)-3,5,7-trimethoxy-chromenylium; chloride 

Relevant articles and documents

Aged red wine pigments as a source of inspiration for organic synthesis - The cases of the color-stable pyranoflavylium and flavylium-(4→8)-flavan chromophores

Two flavylium-based chromophores peculiar to aged red wine pigments are investigated from a synthetic viewpoint. The condensation between easy-to-prepare 5-hydroxy-4-methylflavylium salts and aldehydes, giving birth to color-stable pyranoflavylium pigments, further proves efficient and wide in scope. A set of some twenty structurally-related flavylium-based pigments has been prepared and structure:color relationships are discussed. Furthermore, the synthesis of the flavylium-(4→8)-flavan chromophore is achieved via a novel three-step sequence. The elaborated sequence starts with an iodine-magnesium exchange from an 8-iodinated flavan, thus generating a magnesiated species that then smoothly reacts with a flavone to furnish an adduct, that finally leads to the expected chromophore via dehydration.