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97202-78-3

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97202-78-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 97202-78-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,2,0 and 2 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 97202-78:
(7*9)+(6*7)+(5*2)+(4*0)+(3*2)+(2*7)+(1*8)=143
143 % 10 = 3
So 97202-78-3 is a valid CAS Registry Number.

97202-78-3Relevant articles and documents

Synthesis of bis(7-methyl-2- or 6-purinyl) disulfides

Kowalska, Alicja

, p. 2881 - 2890 (2008/12/23)

Substituted 7-methyl-2- or 6-purinethiones were obtained in series of reactions by nucleophilic substitution with oxygen, chloro, and sulfur nucleophiles. Oxidation of the sulfur atom at position 6 or 2 in purinethiones to corresponding disulfides depende

2,6-Dialkoxy-7-methylpurines

Kowalska, Alicja,Maslankiewicz, Andrzej,Syrek, Barbara,Cieplinski, Piotr

, p. 341 - 352 (2007/10/02)

The preparation of unsymmetrical 2,6-dialkoxy-7-methylpurines (2), and 2-alkoxy-1,7-dialkyl-6-oxo-1,6-dihydropurines (5) is described.In contrast to 1 and 2, a facile thermal lactim-lactam rearrangement from hypoxanthines 5 and 7 into xanthines 6 was observed. - Keywords: Nucleophilic heteroaromatic substitution; thermal lactim-lactam rearrangement; Sigmatropic shifts; Dialkoxy-7H-purines; Dialkyl-1H(or 3H),7H-hypoxanthines; Trialkyl-7H-xanthines

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