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257288-33-8

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257288-33-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 257288-33-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,2,8 and 8 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 257288-33:
(8*2)+(7*5)+(6*7)+(5*2)+(4*8)+(3*8)+(2*3)+(1*3)=168
168 % 10 = 8
So 257288-33-8 is a valid CAS Registry Number.

257288-33-8Downstream Products

257288-33-8Relevant articles and documents

First enantiospecific synthesis of the antitumor marine sponge metabolite (-)-15-oxopuupehenol from (-)-sclareol

Alvarez-Manzaneda,Chahboun,Barranco Perez,Cabrera,Alvarez,Alvarez-Manzaneda

, p. 1477 - 1480 (2007/10/03)

(Chemical Equation Presented) A new route toward puupehenone-related bioactive metabolites from (-)-sclareol, based on the palladium(II)-mediated diastereoselective cyclization of a drimenylphenol, is described. Utilizing this, the first enantiospecific synthesis of the antitumor and antimalarial (-)-15-oxopuupehenol, together with improved syntheses of (+)-puupehenone, (+)-puupehedione, and (+)-15-cyanopuupehenone, were accomplished.

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