20283-46-9

Basic information

• Product Name: 2-(3,4,5-trihydroxyphenyl)-3,4-dihydro-2H-chromene-3,4,5,7-tetrol
• CAS NO: 20283-46-9
• Molecular Formula: C₁₅H₁₄O₈
• Molecular Weight: 322.2669
• Mol File: 20283-46-9.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 634°C at 760 mmHg
• Flash Point: 337.2°C
• Density: 1.814g/cm³
• Vapor Pressure: 6.04E-17mmHg at 25°C
• Refractive Index: 1.816
• CAS DataBase Reference: 2-(3,4,5-trihydroxyphenyl)-3,4-dihydro-2H-chromene-3,4,5,7-tetrol(CAS DataBase Reference)
• NIST Chemistry Reference: 2-(3,4,5-trihydroxyphenyl)-3,4-dihydro-2H-chromene-3,4,5,7-tetrol(20283-46-9)
• EPA Substance Registry System: 2-(3,4,5-trihydroxyphenyl)-3,4-dihydro-2H-chromene-3,4,5,7-tetrol(20283-46-9)

Safety Data

• Hazardous Substances Data: 20283-46-9(Hazardous Substances Data)

Upstream product

• 2596-50-1 (-)-epigallocathechin gallate 

Downstream Products

• 122146-81-0 3,4,5,7-Tetraacetoxy-2-(3,4,5-triacetoxy-phenyl)-chroman 
• 2570-28-7 5,7-dimethoxy-2-(3,4,5-trimethoxy-phenyl)-chroman-3,4-diol 

Relevant articles and documents

Stereoselective oxidation at C-4 of flavans by the endophytic fungus Diaporthe sp. isolated from a tea plant

The microbial transformation of five flavans (1-5) by endophytic fungi isolated from the tea plant Camellia sinensis was investigated. It was found that the endophytic filamentous fungus Diaporthe sp. oxidized stereoselectively at C-4 position of (+)-catechin (1) and (-)-epicatechin (2) to give the correspondent 3,4-cis-dihydroxyflavan derivatives (6, 10), respectively. (-)-Epicatechin 3-O-gallate (3) and (-)-epigallocatechin 3-O-gallate (4) were also oxidized by the fungus into 3,4-dihydroxyflavan derivatives (10, 12) via (-)-epicatechin (2) and (-)-epigallocatechin (11), respectively. Meanwhile, (-)-gallocatechin 3-O-gallate (5), (-)-catechin (ent-1) and (+)-epicatechin (ent-2), which possess a 2S-phenyl substitution, resisted the biotransformation.