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77971-83-6

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77971-83-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77971-83-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,9,7 and 1 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 77971-83:
(7*7)+(6*7)+(5*9)+(4*7)+(3*1)+(2*8)+(1*3)=186
186 % 10 = 6
So 77971-83-6 is a valid CAS Registry Number.

77971-83-6Relevant articles and documents

4-Hydroxy-6,6-dimethyl-5,6-dihydro-2(1H)-pyridinethione and -one and the Corresponding Tautomers

Zigeuner, Gustav,Schweiger, Klaus,Fuchsgruber, Alfred

, p. 187 - 198 (2007/10/02)

The tautomers, 4-hydroxy-5,6-dihydro-6,6-dimethyl-2(1H)-pyridinethione (1) and 6,6-dimethyl-2-thioxo-4-piperidone (2) resp., and 4-hydroxy-5,6-dihydro-6,6-dimethyl-2(1H)-pyridone (9) and 6,6-dimethyl-2,4-piperidinedione (10) resp. were synthesized by hydrolysis of 4-amino-5,6-dihydro-6,6-dimethyl-2(1H)-pyridinethiones (4,5) and -ones (11,12). 1,2 and 9,10 undergo an aminolysis in amines to the corresponding 4-aminodihydro-2(1H)-pyridinethiones 4,5 and -ones 11, 12 resp. - Keywords: 6,6-Dimethyl-2,4-piperidindione; 6,6-Dimethyl-2-thioxo-4-piperidone; 4-Hydroxy-6,6-dimethyl-5,6-dihydro-2(1H)-pyridone, and -pyridinethione; Keto-enol-tautomeris m

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