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129169-51-3

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129169-51-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 129169-51-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,1,6 and 9 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 129169-51:
(8*1)+(7*2)+(6*9)+(5*1)+(4*6)+(3*9)+(2*5)+(1*1)=143
143 % 10 = 3
So 129169-51-3 is a valid CAS Registry Number.

129169-51-3Relevant articles and documents

Aromatic annulation with naphtho[1,8-de]-1,3-dithiin carbocations

Gamage, Swarna A.,Smith, Robin A. J.

, p. 2111 - 2128 (2007/10/02)

The title carbocations have been produced by the reaction of silver trifluoromethanesulfonate with mixed orthothioesters. Intramolecular aromatic electrophilic substitution (annulation) of the cationic intermediates proceeds readily and provides an efficient, chemoselective route for appending six-membered rings to nonactivated aromatic systems.

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