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33543-54-3

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33543-54-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 33543-54-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,5,4 and 3 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 33543-54:
(7*3)+(6*3)+(5*5)+(4*4)+(3*3)+(2*5)+(1*4)=103
103 % 10 = 3
So 33543-54-3 is a valid CAS Registry Number.

33543-54-3Relevant articles and documents

Electrophilic N-amination of two quinazoline-2,4-diones using substituted (Nitrophenyl)hydroxylamines

Boyles, David C.,Curran, Timothy T.,Parlett IV, Roger V.,Davis, Mark,Mauro, Frank

, p. 230 - 233 (2002)

The preparation of a few (nitrophenyl)hydroxylamines and reaction with two quinazoline-2,4-diones is described. The electrophilic aminating agents were assessed in terms of yield for the N-amination of two quinazoline-2,4-diones and safety considerations for rapid scale-up. For the amination of the described system, the best yield and the highest onset temperature were found in the same aminating agent, specifically, (4-nitrophenyl)hydroxylamine.

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