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145903-73-7

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145903-73-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 145903-73-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,5,9,0 and 3 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 145903-73:
(8*1)+(7*4)+(6*5)+(5*9)+(4*0)+(3*3)+(2*7)+(1*3)=137
137 % 10 = 7
So 145903-73-7 is a valid CAS Registry Number.

145903-73-7Relevant 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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