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1213257-99-8

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1213257-99-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1213257-99-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,3,2,5 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1213257-99:
(9*1)+(8*2)+(7*1)+(6*3)+(5*2)+(4*5)+(3*7)+(2*9)+(1*9)=128
128 % 10 = 8
So 1213257-99-8 is a valid CAS Registry Number.

1213257-99-8Relevant articles and documents

Studies on the resorcylates: biomimetic total syntheses of (+)-montagnetol and (+)-erythrin

Basset, Jean-Fran?ois,Leslie, Colin,Hamprecht, Dieter,White, Andrew J.P.,Barrett, Anthony G.M.

supporting information; experimental part, p. 783 - 785 (2010/03/24)

6-(2,4-Dioxopentyl)-2,2-trimethyl-4H-1,3-dioxin-4-one on reflux in toluene gave MeCOCH2COCH2COCH{double bond, long}C{double bond, long}O, which cyclized to 6-(2-oxopropyl)-4-hydroxy-2H-pyran-2-one or was trapped with alcohols to produce resorcylate esters. The method was used for the synthesis of both enantiomers of montagnetol and erythrin.

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