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141859-24-7

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141859-24-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 141859-24-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,1,8,5 and 9 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 141859-24:
(8*1)+(7*4)+(6*1)+(5*8)+(4*5)+(3*9)+(2*2)+(1*4)=137
137 % 10 = 7
So 141859-24-7 is a valid CAS Registry Number.

141859-24-7Relevant articles and documents

Novel 2-thioxanthine and dipyrimidopyridine derivatives: Synthesis and antimicrobial activity

El-Kalyoubi, Samar,Agili, Fatmah,Youssif, Shaker

, p. 19263 - 19276 (2015/11/27)

Several fused imidazolopyrimidines were synthesized starting from 6-amino-1- methyl-2-thiouracil (1) followed by nitrosation, reduction and condensation with different aromatic aldehydes to give Schiff's base. The dehydrocyclization of Schiff's bases using iodine/DMF gave Compounds 5a-g. The methylation of 5a-g using a simple alkylating agent as dimethyl sulfate ((CH3)2SO4) gave either monoalkylated imidazolopyrimidine 6a-g at room temperature or dialkylated derivatives 7a-g on heating 6a-g with ((CH3)2SO4). On the other hand, treatment of 1 with different aromatic aldehydes in absolute ethanol in the presence of conc. hydrochloric acid at room temperature and/or reflux with acetic acid afforded bis-5,5′-diuracylmethylene 8a-e, which cyclized on heating with a mixture of acetic acid/HCl (1:1) to give 9a-e. Compounds 9a-e can be obtained directly by refluxing of Compound 1 with a mixture of acetic acid/HCl. The synthesized new compounds were screened for antimicrobial activity, and the MIC was measured.

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