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133580-52-6

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133580-52-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133580-52-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,5,8 and 0 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 133580-52:
(8*1)+(7*3)+(6*3)+(5*5)+(4*8)+(3*0)+(2*5)+(1*2)=116
116 % 10 = 6
So 133580-52-6 is a valid CAS Registry Number.

133580-52-6Relevant articles and documents

Synthesis of 5,15-Diaryl-Substituted Porphyrins by Aminomethylation of Bis(4-ethyl-3-methyl-2-pyrryl)phenylmethanes

Hombrecher, Hermann K.,Horter, Gaby

, p. 219 - 227 (2007/10/02)

The synthesis of unsymmetrically diarylsubstituted porphyrins 11a-g (yields 5-19 percent) is described.Aminomethylation of dipyrromethane 6a with Mannich reagent 9 in acetonitrile leads to the intermediate 10, which is directly converted into the porphyri

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