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17991-22-9

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17991-22-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 17991-22-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,9,9 and 1 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 17991-22:
(7*1)+(6*7)+(5*9)+(4*9)+(3*1)+(2*2)+(1*2)=139
139 % 10 = 9
So 17991-22-9 is a valid CAS Registry Number.

17991-22-9Downstream Products

17991-22-9Relevant articles and documents

The Formation of Bridged Bicyclic 1,2,4-Trioxanes by Intramolecular Capture of β-Hydroperoxy Cations

Jefford, Charles W.,Favarger, France,Ferro, Serenella,Chambaz, Daniel,Bringhen, Alain,et al.

, p. 1778 - 1786 (1986)

The 1,4-endoperoxide, prepared from 3-(4-methylnaphth-1-yl) propanal by photo-oxygenation in CH2Cl2, gave on treatment with Amberlyst-15, 3,10b-epidioxy-2,3,4a,10b-tetrahydro-6-methyl-1H-naphthopyran in 85percent yield.Its structure was determined by X-ray crystal structure analysis.The 1,2,4-trioxane moiety is locked in a twist-boat conformation with trans fusion to the parent six-membered ring.The 1,4-endoperoxides of the methyl, butyl, and phenyl ketone analogues of the aforementioned aldehyde underwent similar acid-catalyzed rearrangement to the corresponding bridged bicyclic trioxanes in 94,47, and 48percent yelds, respectively.

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