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22802-57-9

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22802-57-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 22802-57-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,8,0 and 2 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 22802-57:
(7*2)+(6*2)+(5*8)+(4*0)+(3*2)+(2*5)+(1*7)=89
89 % 10 = 9
So 22802-57-9 is a valid CAS Registry Number.

22802-57-9Downstream Products

22802-57-9Relevant articles and documents

Nitrosation of phenolic substrates under mildly basic conditions: Selective preparation of p-quinone monooximes and their antiviral activities

Ishikawa, Tsutomu,Watanabe, Toshiko,Tanigawa, Hisashi,Saito, Tatsuru,Kotake, Ken-Ichiro,Ohashi, Yoshiaki,Ishii, Hisashi

, p. 2774 - 2779 (2007/10/03)

Nitrosation of 3-methoxyphenol and 1-naphthol were examined under both acidic (NaNO2-EtCO2H-H2O) and basic (i-AmNO2-K2CO3-DMF) conditions. Acidic nitrosations afforded ortho-directed products, whereas para-directed nitrosations were observed under basic conditions to yield p-quinone monooximes. The basic para-directed nitrosation was further examined using 15 phenols, two naphthols, and four phenolic heterocyclics. A one-pot operation of the basic nitrosation followed by methylation with dimethyl sulfate gave the corresponding methyl ethers in high yield. Two p-quinone monooximes derived from 3-methoxyphenol and 8-hydroxyquinoline showed a moderate activity against HSV-1, and the latter oxime was also effective against HSV-2. On the other hand, p-quinone monooximes derived from methyl salicylate, 1-naphthol, 7-hydroxy-2-methylbenzo[b]furan, and 8-hydroxycoumarin showed the comparable activity to that of DDI against HIV-1.

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