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81391-08-4

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81391-08-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81391-08-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,3,9 and 1 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81391-08:
(7*8)+(6*1)+(5*3)+(4*9)+(3*1)+(2*0)+(1*8)=124
124 % 10 = 4
So 81391-08-4 is a valid CAS Registry Number.

81391-08-4Relevant articles and documents

A Practical synthesis of 3-Acyl cyclobutanones by [2 〈 2] annulation. Mechanism and utility of the zn(II)-Catalyzed condensation of r-Chloroenamines with electron-deficient alkenes

O'Brien, Jeannette M.,Kingsbury, Jason S.

experimental part, p. 1662 - 1672 (2011/05/12)

New conditions for the conversion of simple tertiary amides to R-chloroenamines and their use in Zn(II)-catalyzed cycloaddition reactions with commercial α,β-unsaturated carbonyl compounds allows rapid, regiocontrolled access to 3-acyl cyclobutanones. Rea

Cyclobutanon- und Cyclobutenon-Derivate durch Reaktion tertiaerer Amide mit Alkenen bzw. Alkinen

Falmagne, Jean-Bernard,Escudero, Jose,Taleb-Sahraoui, Safia,Ghosez, Leon

, p. 926 - 931 (2007/10/02)

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