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176720-90-4

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176720-90-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 176720-90-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,6,7,2 and 0 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 176720-90:
(8*1)+(7*7)+(6*6)+(5*7)+(4*2)+(3*0)+(2*9)+(1*0)=154
154 % 10 = 4
So 176720-90-4 is a valid CAS Registry Number.

176720-90-4Relevant articles and documents

Acyl cyanides as carbonyl heterodienophiles: Application to the synthesis off naphthols, isoquinolones, and isocoumarins

Connors, Richard

, p. 221 - 226 (2007/10/03)

Irradiation of 2-methylbenzoyl cyanide (3a) in acetonitrile solution results in the formation of its dimer, which upon loss of HCN gives rise to the cycloadduct 7a. The dimerization also proceeds efficiently with derivatives of 3a giving adducts 7b and 7c

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