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121237-83-0

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121237-83-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 121237-83-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,2,3 and 7 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 121237-83:
(8*1)+(7*2)+(6*1)+(5*2)+(4*3)+(3*7)+(2*8)+(1*3)=90
90 % 10 = 0
So 121237-83-0 is a valid CAS Registry Number.

121237-83-0Relevant articles and documents

PROTECTING GROUPS THAT INCORPORATE A 4-PENTENYL ACETAL MOIETY CAN BE CLEAVED UNDER NEUTRAL CONDITIONS

Wu, Zufan,Mootoo, D. R.,Fraser-Reid, Bert

, p. 6549 - 6552 (2007/10/02)

Alcohols can be protected as their 4-pentenyloxymethyl (POM) ethers, and regenerated therefrom by treatment with NBS in CH3CN/H2O.Ketones and aldehydes are converted into ketals by reaction with 5-hexen-1,2-diol.Regeneration occurs by treatment with NBS or Hg(OAc)2 in aqueous media.Vicinal diols are are converted into acetals by reaction with 4-pentenal.Deprotection is achieved by sequential oxidative and reductive steps.

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