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431905-00-9

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431905-00-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 431905-00-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,1,9,0 and 5 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 431905-00:
(8*4)+(7*3)+(6*1)+(5*9)+(4*0)+(3*5)+(2*0)+(1*0)=119
119 % 10 = 9
So 431905-00-9 is a valid CAS Registry Number.

431905-00-9Relevant articles and documents

Novel syntheses of polysubstituted pyrroles and oxazoles by 1,3-dipolar cycloaddition reactions of benzotriazole-stabilized nitrile ylides

Katritzky, Alan R.,Zhang, Suoming,Wang, Mingyi,Kolb, Hartmuth C.,Steel, Peter J.

, p. 759 - 765 (2007/10/03)

1,3-Dipolar cycloadditions of benzotriazole-stabilized nitrile ylides with benzyl α,β-unsaturated-carboxylates and aldehydes as dipolarophiles proceeded smoothly and efficiently to give polysubstituted pyrroles and oxazoles, respectively, in good yields.

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