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81180-04-3

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81180-04-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81180-04-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,1,8 and 0 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 81180-04:
(7*8)+(6*1)+(5*1)+(4*8)+(3*0)+(2*0)+(1*4)=103
103 % 10 = 3
So 81180-04-3 is a valid CAS Registry Number.

81180-04-3Relevant articles and documents

Reactions of 5-Arylmethylene-4-oxo-2-thioxothiazolidines with Amines

Omar, M. T.,Sherif, F. A.

, p. 849 - 851 (2007/10/02)

Piperidine, morpholine and benzylamine react with 5-arylmethylene-4-oxo-2-thioxothiazolidines (I) to give the corresponding piperidine (IIa-d), morpholine (IIe-f) and benzylamine (IIg) salts which on treatment with ethanol undergo decomposition to give the respective 2-piperidino- and 2-morpholino-4-oxo-2-thiazolines (III), and 2-benzylimino-4-oxothiazolidine (IVa).However, decomposition of IIa-d in the presence of an equimolar amount of morpholine gives mixtures of 2-piperidino- and 2-morpholino-4-oxo-2-thiazolines (III).Furthermore, decomposition of IIe, c and d inthe presence of an excess of a primary amine affords exclusively the respective 2-substituted-imino-4-oxo-thiazolidines (IV).Cleavage of 5-arylmethylene-3-methyl-4-oxo-2-thioxothiazolidines (Va-b and e-g) with excess of piperidine affords 1-(N-methylthiocarbamyl)piperidine (VI).The structures of II, III, IV and VI are based on analytical and spectral data.

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