2,3,2'',3''-Tetrahydroochnaflavone
Standard reference
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Beilstein J Org Chem. 2013 Jul 8;9:1346-51.
Total synthesis of ochnaflavone.[Pubmed:
23946830]
METHODS AND RESULTS:
The first total syntheses of ochnaflavone, an asymmetric biflavone consisting of apigenin and luteolin moieties, and the permethyl ether of 2,3,2'',3''-Tetrahydroochnaflavone have been achieved. The key steps in the synthesis of ochnaflavone were the formation of a diaryl ether and ring cyclization of an ether-linked dimeric chalcone to assemble the two flavone nuclei.
CONCLUSIONS:
Optimal experimental conditions for the oxidative cyclization to form ochnaflavone were established.
J Nat Prod. 2004 Apr;67(4):693-6.
Ether-linked biflavonoids from Quintinia acutifolia.[Pubmed:
15104507]
METHODS AND RESULTS:
The New Zealand tree Quintinia acutifolia has yielded four biflavonoids, the new 2,3,2'',3''-Tetrahydroochnaflavone (3), and its 7,7''-di-O-methyl derivative (1). The rare 7-O-methyl-2,3,2'',3''-Tetrahydroochnaflavone (2) and 2'',3''-dihydroochnaflavone (4), both previously identified only from members of the Ochnaceae, were also isolated. Structures were determined by spectroscopic methods.
CONCLUSIONS:
This is the first report of biflavonoids from the Grossulariaceae.
