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813459-69-7

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813459-69-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 813459-69-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,1,3,4,5 and 9 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 813459-69:
(8*8)+(7*1)+(6*3)+(5*4)+(4*5)+(3*9)+(2*6)+(1*9)=177
177 % 10 = 7
So 813459-69-7 is a valid CAS Registry Number.

813459-69-7Relevant articles and documents

The Preparation of (1α,3β)-3-Hydroxycholestane-4,6-diene- 1,25-diol Diacetate from a 5,7-Diene Precursor: A New Method for the Synthesis of Heteroannular Dienes

Arnum, Susan D. Van,Carpenter, Barry K.,Parrish, David R.,MacIntrye, Archibald

, p. 8533 - 8536 (2004)

Starting from the 7α-bromide 5a, a regioselective synthesis of (1α,3β)-3-hydroxycholestane-4,6-diene-1,25-diol diacetate (2) is described. The preparative removal of contaminating 5,7-diene 9 was accomplished by the formation of the corresponding Diels-Alder adduct 11. Acetylation of the diacetate 2 followed by acid-catalyzed elimination and rearrangement yielded styrene 13.

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