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72541-91-4

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72541-91-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 72541-91-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,5,4 and 1 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 72541-91:
(7*7)+(6*2)+(5*5)+(4*4)+(3*1)+(2*9)+(1*1)=124
124 % 10 = 4
So 72541-91-4 is a valid CAS Registry Number.

72541-91-4Downstream Products

72541-91-4Relevant articles and documents

Cycloaddition Reactions of Thiophene S,N-Ylides. A Novel Route to Thionitroso Compounds

Meth-Cohn, Otto,Vuuren, Gerda van

, p. 1144 - 1146 (2007/10/02)

Thiophene S,N-ylides readily react with electron-rich dienophiles yielding adducts formed by the efficient extrusion of acyl- and sulphonyl-thionitroso-compounds, themselves readily trapped by Diels-Alder or ene reactions; similar but slower cycloadditions occur with the analogous S,C-ylides, a potential source of thiocarbonyl derivatives.

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