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3081-21-8

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3081-21-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 3081-21-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,0,8 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 3081-21:
(6*3)+(5*0)+(4*8)+(3*1)+(2*2)+(1*1)=58
58 % 10 = 8
So 3081-21-8 is a valid CAS Registry Number.

3081-21-8Relevant articles and documents

ACTIVATION OF A CARBOXY GROUP BY DIALKYL PYROCARBONATES. SYNTHESIS OF SYMMETRICAL ANHYDRIDES AND ARYL ESTERS OF N-PROTECTED AMINO ACIDS USING DI-tert-BUTYL PYROCARBONATE AS CONDENSING REAGENT

Pozdnev, V. F.,Chernaya, M. Yu.

, p. 333 - 337 (2007/10/02)

It has been shown that di-tert-butyl pyrocarbonate can be used as a condensing reagent in the production of anhydrides and some aryl esters of carboxylic acids.The synthesis of anhydrides and of phenyl, p-nitrophenyl, β-naphtyl, and quinolin-8-yl esters of N-protected amino acids is described.

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