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25662-34-4

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25662-34-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25662-34-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,6,6 and 2 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 25662-34:
(7*2)+(6*5)+(5*6)+(4*6)+(3*2)+(2*3)+(1*4)=114
114 % 10 = 4
So 25662-34-4 is a valid CAS Registry Number.

25662-34-4Downstream Products

25662-34-4Relevant articles and documents

2-TOSYLOXYMETHYLCYCLANONES: RING SIZE DEPENDENCE OF FRAGMENTATION VERSUS INTRAMOLECULAR ALKYLATION

Heinz, Uwe,Adams, Elisabeth,Klintz, Ralf,Welzel, Peter

, p. 4217 - 4230 (2007/10/02)

The results reported seem to indicate, that in the presence of a nucleophilic base intramolecular alkylation is the normal reaction mode of tosyloxymethylcyclanones of type 14 and that the fragmentation reaction of five-membered compounds is the exception, probably because of the high steric energy of the alkylation transition states, e.g. of type E.

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