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113961-92-5

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113961-92-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 113961-92-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,3,9,6 and 1 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 113961-92:
(8*1)+(7*1)+(6*3)+(5*9)+(4*6)+(3*1)+(2*9)+(1*2)=125
125 % 10 = 5
So 113961-92-5 is a valid CAS Registry Number.

113961-92-5Downstream Products

113961-92-5Relevant articles and documents

Tungstate-Catalyzed Oxidation of Tetrahydroquinolines with Hydrogen Peroxide: A Novel Method for the Synthesis of Cyclic Hydroxamic Acids

Murahashi, Shun-Ichi,Oda, Tetsuya,Sugahara, Toshiaki,Masui, Yoshiyuki

, p. 1744 - 1749 (1990)

The sodium tungstate catalyzed oxidation of 1,2,3,4-tetrahydroquinolines (1) with 30percent aqueous hydrogen peroxide solution in methanol gives 1-hydroxy-3,4-dihydroquinolin-2(1H)-ones (2), which are important biologically active compounds, in good to excellent yields.The cyclic hydroxamic acid 7 is also obtained in good yield.Since reduction of 2 thus obtained gives 3,4-dihydroquinolin-2(1H)-ones (4), the present reaction provides a convenient method for synthesis of 4 from 1.

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