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131287-05-3

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131287-05-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131287-05-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,2,8 and 7 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 131287-05:
(8*1)+(7*3)+(6*1)+(5*2)+(4*8)+(3*7)+(2*0)+(1*5)=103
103 % 10 = 3
So 131287-05-3 is a valid CAS Registry Number.

131287-05-3Downstream Products

131287-05-3Relevant articles and documents

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

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

, p. 4217 - 4230 (1990)

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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