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117759-81-6

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117759-81-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 117759-81-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,7,5 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 117759-81:
(8*1)+(7*1)+(6*7)+(5*7)+(4*5)+(3*9)+(2*8)+(1*1)=156
156 % 10 = 6
So 117759-81-6 is a valid CAS Registry Number.

117759-81-6Relevant articles and documents

Synthetic elaboration of N-substituents in thioamides

Katritzky, Alan R.,Denisko, Olga,Lang, Hengyuan

, p. 8703 - 8710 (2007/10/02)

N-(Benzotriazol-1-ylmethyl)arylthioamides, readily prepared from arylthioamides, formaldehyde and benzotriazole, undergo lithiation followed by reactions with alkyl halides, aldehydes and ketones to introduce the expected N-substituents into the N-methylene group. Subsequent displacements of the benzotriazolyl group by Grignard reagents, alkoxide or thioalkoxide anions provide general access to a wide variety of N-substituted thioamides in good yields.

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