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191472-79-4

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191472-79-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 191472-79-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,4,7 and 2 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 191472-79:
(8*1)+(7*9)+(6*1)+(5*4)+(4*7)+(3*2)+(2*7)+(1*9)=154
154 % 10 = 4
So 191472-79-4 is a valid CAS Registry Number.

191472-79-4Downstream Products

191472-79-4Relevant articles and documents

Synthesis and anti-HIV-1 activity of a series of 1-alkoxy-5-alkyl-6- (arylthio)uracils

Kim, Dae-Kee,Gam, Jongsik,Kim, Young-Woo,Lim, Jinsoo,Kim, Hun-Taek,Kim, Key H.

, p. 2363 - 2373 (2007/10/03)

A series of 1-alkoxy-5-alkyl-6-(arylthio)uracils was synthesized and tested for their ability to inhibit HIV-1 replication. Treatment of 2-alkyl- 3,3-bis(methylthio)acryloyl chlorides (5a-e) with AgOCN in benzene followed by reaction of the resulting isocyanates 6a-e with an appropriate alkoxyamine gave N-alkoxy-N'-((2-alkyl-3,3-bis(methylthio)acryloyl)ureas (10a-z) in good to excellent yields. Cyclization of 10a-z in AcOH containing a catalytic amount of p-TsOH produced 1-alkoxy-5-alkyl-6-(methylthio)uracils (11a-z). Oxidation of 11a-z with 3-chloroperoxybenzoic acid in CH2Cl2 resulted in high yields of 1-alkoxy-5-alkyl-6-(methylsulfonyl)uracils (12a-x and 12z) and 1-(benzyloxy)-6-(methylsulfinyl)thymine (12y), which were subsequently reacted with an appropriate arenethiol in ethanolic NaOH solution to afford 1-alkoxy-5-alkyl-6-(arylthio)uracils (14-49). Substitution at the 3- and 5- positions of the C-6-(phenylthio) ring by two methyl groups significantly increased its original anti-HIV-1 activity (EC50: 6-((3,5- dimethylphenyl)thio)-5-isopropyl-1-propoxyuracil (18), 0.064 μM; 6-((3,5- dimethylphenyl)thio)-1-(3-hydroxypropoxy)-5-isopropyluracil (23), 0.19 μM). Among the various alkoxy substituents at the N-1, the propoxy group was the most beneficial for improving the anti-HIV-1 activity. The 1-propoxy derivative 18 proved to be the most potent inhibitor of HIV-1 replication, followed by the 1-(3-hydroxypropoxy) derivative 23. Introduction of an isopropyl group at C-5 of the uracil base also remarkably enhanced the activity. When compound 18 was incubated with a rat liver homogenate preparation, no metabolite was observed, thus confirming the metabolic stability of the N-O bond in these 1-alkoxyuracils.

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