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663177-53-5

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663177-53-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 663177-53-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,3,1,7 and 7 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 663177-53:
(8*6)+(7*6)+(6*3)+(5*1)+(4*7)+(3*7)+(2*5)+(1*3)=175
175 % 10 = 5
So 663177-53-5 is a valid CAS Registry Number.

663177-53-5Downstream Products

663177-53-5Relevant articles and documents

Synthesis of 4- and 6-substituted nitroindoles

Moskalev, Nikolai,Barbasiewicz, Micha?,Ma?kosza, Mieczys?aw

, p. 347 - 358 (2007/10/03)

Enolizable ketones react with m-nitroaniline in the presence of strong base such as t-BuOK to give 4- and 6-substituted nitroindoles. The reaction proceeds via oxidative nucleophilic substitution of hydrogen in m-nitroaniline with enolate anions in positions ortho to the amino group giving anionic σH adducts that are additionally stabilized by intramolecular interaction between the amino and the carbonyl group. Spontaneous oxidation of the σH adducts followed by the Bayer type condensation of the produced ortho-aminonitrobenzyl ketones gives 4- and 6-substituted nitroindoles. The scope of this reaction and its basic mechanistic features are discussed.

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