Psoracorylifol B
Psoracorylifol B has antimicrobial activity.
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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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Tetrahedron, 2006, 62(11):2569-2575.
Psoracorylifols A–E, five novel compounds with activity against Helicobacter pylori from seeds of Psoralea corylifolia[Reference:
WebLink]
METHODS AND RESULTS:
Five novel compounds, psoracorylifol A,Psoracorylifol B,psoracorylifol C, psoracorylifol D,psoracorylifol E (1–5) with important activity against Helicobacter pylori have been isolated from a well-known traditional Chinese medicine (TCM), the seeds of Psoralea corylifolia. The structures of compounds 1–5, including their absolute configurations, were established on the basis of spectral methods and biogenetic reason.
CONCLUSIONS:
The structure of 1 was confirmed by a single-crystal X-ray diffraction. Psoracorylifols D and E (4 and 5) represent an unprecedented carbon skeleton. The biogenetic origin of psoracorylifols A–E (1–5) was also postulated.
Org Lett. 2014 Jun 6;16(11):2986-9.
Scalable asymmetric total syntheses of (+)-Psoracorylifol B and (+)-ent-Psoracorylifol C.[Pubmed:
24819702 ]
METHODS AND RESULTS:
The first, asymmetric total syntheses of potent antimicrobial Psoracorylifol B (>1.3 g obtained, dr 10.5:1) with a 9.4% overall yield on a gram scale in 14 steps and ent-Psoracorylifol C with a 4.3% yield in 16 steps were achieved. The key features of our synthesis include (i) sequential, rarely explored Achmatowicz rearrangement/bicycloketalization to construct the 6,8-dioxabicyclo[3.2.1]octane core, and (ii) Cu-mediated SN2' methylation or Johnson-Claisen rearrangement to stereoselectively install the all-carbon quaternary stereocenter.
CONCLUSIONS:
This concise, highly efficient, and scalable synthetic route may provide expedited and practical access to psoracorylifols and their analogues for further biological activity evaluation.
