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91633-25-9

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91633-25-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91633-25-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,6,3 and 3 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 91633-25:
(7*9)+(6*1)+(5*6)+(4*3)+(3*3)+(2*2)+(1*5)=129
129 % 10 = 9
So 91633-25-9 is a valid CAS Registry Number.

91633-25-9Downstream Products

91633-25-9Relevant articles and documents

Lewis Acid Catalyzed Conversion of Alkenes and Alcohols to Azides

Hassner, Alfred,Fibiger, Richard,Andisik, Donald

, p. 4237 - 4244 (2007/10/02)

Hydrazoic acid, though unreactive to alkenes, adds readily to enol ethers.In the presence of Lewis acids, in particular TiCl4, addition takes place readily to phenylethylenes or 1,1-disubstituted ethylenes to produce alkyl azides.Regiochemical, electronic, and steric influences were explored.TiCl4 also served to catalyze conversion of benzyl or tertiary alcohols to azides.Monosubstituted alkenes or primary alcohols are not affected.

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