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208400-76-4

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208400-76-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 208400-76-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,8,4,0 and 0 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 208400-76:
(8*2)+(7*0)+(6*8)+(5*4)+(4*0)+(3*0)+(2*7)+(1*6)=104
104 % 10 = 4
So 208400-76-4 is a valid CAS Registry Number.

208400-76-4Relevant articles and documents

Intramolecular Friedel-Crafts alkylation promoted by the cross conjugated β-keto ester system. An efficient approach to highly functionalized hydrophenanthrenes and hydrochrysenes

Liu, Hsing-Jang,Tran, Duong Duc-Phi

, p. 3827 - 3830 (2007/10/03)

The cross conjugated β-keto ester system was shown to be an excellent promoter for the intramolecular Friedel-Crafts alkylation to facilitate the rapid construction of highly functionalized phenanthrene and chrysene derivatives.

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