5892-39-7

Basic information

• Product Name: 2-(4-methoxyphenyl)-4-oxo-4H-chromene-5,7-diyl diacetate
• CAS NO: 5892-39-7
• Molecular Formula: C₂₀H₁₆O₇
• Molecular Weight: 368.3368
• Mol File: 5892-39-7.mol
• Article Data: 5

Chemical Properties

• Boiling Point: 546.3°C at 760 mmHg
• Flash Point: 240.8°C
• Density: 1.322g/cm³
• Vapor Pressure: 5.44E-12mmHg at 25°C
• Refractive Index: 1.586
• CAS DataBase Reference: 2-(4-methoxyphenyl)-4-oxo-4H-chromene-5,7-diyl diacetate(CAS DataBase Reference)
• NIST Chemistry Reference: 2-(4-methoxyphenyl)-4-oxo-4H-chromene-5,7-diyl diacetate(5892-39-7)
• EPA Substance Registry System: 2-(4-methoxyphenyl)-4-oxo-4H-chromene-5,7-diyl diacetate(5892-39-7)

Safety Data

• Hazardous Substances Data: 5892-39-7(Hazardous Substances Data)

Upstream product

• 420-37-1 trimethoxonium tetrafluoroborate 
• 132351-62-3 5,7-diacetoxy-4'-hydroxyflavone 
• 3316-46-9 apigenin triacetate 
• 520-36-5 5,7-dihydroxy-2-(4-hydroxyphenyl)-4H-1-benzopyran-4-one 
• 480-41-1 5,7-Dihydroxy-2-(4-hydroxy-phenyl)-chroman-4-on 
• 10236-47-2 naringin 
• 20633-93-6 5-hydroxy-4'-methoxy-7-[(2-O-α-L-rhamnopyranosyl-β-D-glucopyranosyl)oxy]flavone 
• 480-44-4 5,7-dihydroxy-2-(4'-methoxyphenyl)-4H-1-benzopyran-4-one 
• 108-24-7 acetic anhydride 

Downstream Products

• 480-44-4 5,7-dihydroxy-2-(4'-methoxyphenyl)-4H-1-benzopyran-4-one 

Relevant articles and documents

CLERODANE AND LABDANE DITERPINOIDS FROM BACCHARIS SPECIES

Key Word Index - Baccharis spp; Compositae; diterpenes; clerodanes; labdanes; nor-diterpene. The investigation of eight Baccharis species afforded, in addition to known compounds, five clerodanes, three labdane derivatives and a nor-diterpene as well as one hydroperoxide derived from 4α-hydroxygermacra-1(10),5-diene.The structures were elucidated by spectroscopic methods.The structures of esters isolated previously from B. cassinaefolia have to be revised.Chemotaxonomic aspects are discussed briefly.

Synthesis of acacetin and resveratrol 3,5-di-O-β-glucopyranoside using lipase-catalyzed regioselective deacetylation of polyphenol glycoside peracetates as the key step

Acacetin and resveratrol 3,5-di-O-β-glucopyranoside were synthesized from naturally abundant naringin and piceid in 65% and 62% overall yield, respectively. The key steps were the regioselective deacetylation of the peracetates of the glycosylated forms with Candida antarctica lipase B (Novozym 435) and Burkholderia cepacia lipase (Amano PS-IM). Deacetylation occurred exclusively at the least hindered position of the aromatic moieties and all acetyl groups in the sugar side chain remained intact. This excellent selectivity enabled regiospecific transformation of the liberated phenolic hydroxy groups, resulting in efficient synthesis of the target molecules.

Chemical components of Pyrostegia venusta flowers

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