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90557-38-3

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90557-38-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90557-38-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,5,5 and 7 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 90557-38:
(7*9)+(6*0)+(5*5)+(4*5)+(3*7)+(2*3)+(1*8)=143
143 % 10 = 3
So 90557-38-3 is a valid CAS Registry Number.

90557-38-3Relevant articles and documents

Reactions of Organic Anions, 147.- Simple and General Synthesis of Hydroxy- and Methoxyindoles via Vicarious Nucleophilic Substitution of Hydrogen

Makosza, Mieczyslaw,Danikiewicz, Witold,Wojciechowski, Krzysztof

, p. 203 - 208 (2007/10/02)

A simple synthesis of 4-, 5-, 6-, and 7-hydroxy- and -methoxyindoles via cyanoalkylation of O-protected nitrophenols by vicarious nucleophilic substitution of hydrogen, followed by catalytic hydrogenation of the (2-nitroaryl)acetonitriles obtained is described.

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