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174578-91-7

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174578-91-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 174578-91-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,4,5,7 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 174578-91:
(8*1)+(7*7)+(6*4)+(5*5)+(4*7)+(3*8)+(2*9)+(1*1)=177
177 % 10 = 7
So 174578-91-7 is a valid CAS Registry Number.

174578-91-7Relevant articles and documents

A study on the scope of the photochemical 1,3-migration of oximino groups in β,γ-unsaturated oximes and oxime derivatives

Armesto, Diego,Gallego, Mar G.,Horspool, William M.,Ramos, Ana

, p. 107 - 113 (2007/10/03)

While the aza-di-π-methane rearrangement is the normal photoreactive behaviour of β,γ-unsaturated imines and oxime acetates, the results obtained in this study show that 1,3-migrations of acetoxyimino groups in β,γ-unsaturated oxime acetates takes place only when all the parameters are correct. The rearrangement takes place when there is a quaternary carbon separating the two π-systems and when one of the radical centres in the intermediate cyclobutyl 1,4-biradical is stabilized by conjugation with a phenyl ring. Suppression of the free rotor effect also helps to promote the reaction. These criteria are fulfilled in compounds 1a and 7a. The reaction was extended to the β,γ-unsaturated oximes 1b and 7b where again the 1,3-migration of the oximino group took place. Copyright 1996 by the Royal Society of Chemistry.

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