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138777-99-8

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138777-99-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138777-99-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,7,7 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 138777-99:
(8*1)+(7*3)+(6*8)+(5*7)+(4*7)+(3*7)+(2*9)+(1*9)=188
188 % 10 = 8
So 138777-99-8 is a valid CAS Registry Number.

138777-99-8Relevant articles and documents

Anodic Oxidation Products of 2',5'-Dimethoxyacetanilide Derivatives, and Their Application to the Synthesis of Aminoanthraquinones

Russell, Richard A.,Longmore, Robert W.,Warrener, Ronald N.

, p. 1691 - 1704 (2007/10/02)

Anodic oxidation of simple 2',5'-dimethoxyacetanilides proceeds under mildly basic conditions to afford either monomeric or dimeric quinone bisacetals, depending on the structure of the substrate.Similarly, the oxidation of linked derivatives of 2',5'-dimethoxyacetanilides is shown to exhibit a comparable sensitivity, with non-alkylated amides being efficiently converted into bis(quinone bisacetals).The regiospecificity of acetal hydrolysis for both simple and linked quinone bisacetals is shown to be dependent upon the nature of the N-acyl group.The annelation of these hydrolysis products with the anion of 3-cyanophthalide to yield (acylamino)anthraquinones is also reported.

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