Cas 118921-64-5,methyl-2-(tosyloxy)butyrate

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Check Digit Verification of cas no

The CAS Registry Mumber 118921-64-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,9,2 and 1 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 118921-64:
(8*1)+(7*1)+(6*8)+(5*9)+(4*2)+(3*1)+(2*6)+(1*4)=135
135 % 10 = 5
So 118921-64-5 is a valid CAS Registry Number.

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118921-64-5Relevant articles and documents

Functionalization of carboxylic anhydrides at α-carbon with hypervalent iodine reagents: One-pot conversion of anhydrides to 2-sulfonyloxycarboxylate esters

Goff, Jeffrey M.,Justik, Michael W.,Koser, Gerald F.

, p. 5597 - 5599 (2007/10/03)

The treatment of carboxylic anhydrides with iodine(III) sulfonate reagents at ca. 100°C and esterification of the reaction mixtures with MeOH/TsOH·H2O affords 2-sulfonyloxycarboxylate esters. This is consistent with enolic behavior in the anhyd

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118921-64-5