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163913-93-7

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163913-93-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 163913-93-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,3,9,1 and 3 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 163913-93:
(8*1)+(7*6)+(6*3)+(5*9)+(4*1)+(3*3)+(2*9)+(1*3)=147
147 % 10 = 7
So 163913-93-7 is a valid CAS Registry Number.

163913-93-7Downstream Products

163913-93-7Relevant articles and documents

Preparation of E-(2-substituted-1-methylethylidene)indanones derived from monic acid

Pearson, Neil D.,Broom, Nigel J.P.,O'Hanlon, Peter J.

, p. 3771 - 3774 (2007/10/02)

Alkylation of the lithium dienolate of the monic acid hydroxamate (3) with o-bromo(bromomethyl) benzene or heteroaromatic derivatives gave α-alkylated products (5). This alkylation procedure was surprisingly catalysed by 4- dimethylaminopyridine. Metal-halogen exchange with t-butyl lithium occurred with concomitant intramolecular cyclisation to give a mixture of the deconjugated ketones (6). Reconjugation with potassium t-butoxide stereoselectively produced the E-isomer (7). Deprotection gave the monic acid derived ketone (1).

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