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41891-03-6

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41891-03-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 41891-03-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,8,9 and 1 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 41891-03:
(7*4)+(6*1)+(5*8)+(4*9)+(3*1)+(2*0)+(1*3)=116
116 % 10 = 6
So 41891-03-6 is a valid CAS Registry Number.

41891-03-6Downstream Products

41891-03-6Relevant articles and documents

Manipulation of N,O-nucleophilicity: Efficient formation of 4-N-substituted 2,4-dihydro-3H-1,2,4-triazolin-3-ones

Huang, Xianhai,Palani, Anandan,Xiao, Dong,Aslanian, Robert,Shih, Neng-Yang

, p. 4795 - 4798 (2007/10/03)

(Chemical Equation Presented) A new efficient two-step synthesis of 2,4-dihydro-3H-1,2,4-triazolin-3-ones (triazolinones) from readily available amines is reported. Our novel conditions using hexamethyl disilazane, bromotrimethylsilane, and a catalytic amount of ammonium sulfate smoothly cyclize 1-formyl and 1-acetyl semicarbazides to the target triazolinones. This transformation features simultaneous manipulation of N- and O-nucleophilicity as well as differentiation of the nucleophilicity of a urea and an acyl carbonyl.

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