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208349-17-1

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208349-17-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 208349-17-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,8,3,4 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 208349-17:
(8*2)+(7*0)+(6*8)+(5*3)+(4*4)+(3*9)+(2*1)+(1*7)=131
131 % 10 = 1
So 208349-17-1 is a valid CAS Registry Number.

208349-17-1Relevant articles and documents

Preparation and properties of unsymmetrical benzoins and related compounds

Corrie, John E.T.

, p. 5407 - 5416 (2007/10/03)

Synthesis of unsymmetrical benzoins and their esters can be compromised by isomerisation via the enediol (or its anion). This could be avoided by suitable reaction conditions for the benzoins and their esters 2a/b and 3a/b but not for the 3-furyl compound 4a. A convenient synthesis of 3,5-dimethoxy- 2,4,6-trimetbylbenzaldehyde 10 is described and the compound was converted to the hindered benzoin 5a.

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