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54521-25-4

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54521-25-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54521-25-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,5,2 and 1 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 54521-25:
(7*5)+(6*4)+(5*5)+(4*2)+(3*1)+(2*2)+(1*5)=104
104 % 10 = 4
So 54521-25-4 is a valid CAS Registry Number.

54521-25-4Downstream Products

54521-25-4Relevant articles and documents

Intermediate in Sommelet-Hauser Rearrangement of N,N-Dimethylbenzylammonium N-Methylides

Shirai, Naohiro,Watanabe, Yoko,Sato, Yoshiro

, p. 2767 - 2770 (2007/10/02)

Formation of benzylammonium N-methylides by fluoride anion induced desilylation of dimethyl(4-substituted benzyl)ammonium halides (1) and 3-substituted benzyl analogues (6) was examined to isolate 5--6-methylene-1,3-cyclohexadienes (isotoluene intermediates, 3,8,10) in the Sommelet-Hauser rearrangement.Some isotoluenes were isolated and their structures were confirmed by 1H NMR analysis.The stability of the isotoluenes was dependent on the electron-donating effects of the substituents on the conjugated bonds, and 3-methoxy-substituted isotoluene 3a was the most stable compound studied.

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