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121056-73-3

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121056-73-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 121056-73-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,0,5 and 6 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 121056-73:
(8*1)+(7*2)+(6*1)+(5*0)+(4*5)+(3*6)+(2*7)+(1*3)=83
83 % 10 = 3
So 121056-73-3 is a valid CAS Registry Number.

121056-73-3Downstream Products

121056-73-3Relevant articles and documents

Regiochemistry of the Intramolecular Photocycloaddition of Enones to Vinyl Ethers as a Function of Chain Length

Gleiter, Rolf,Fischer, Evelyn

, p. 1899 - 1912 (2007/10/02)

The intramolecular cycloaddition of a cyclohexenone moiety bound to a vinyl ether fragment has been explored.The regiochemistry and the quantum yield of the reaction has been investigated as a function of the chain length n and the position of the methoxy group.It has been found that in those cases where the chain consists of three and four members the position of the methoxy group has no influence on the regiochemistry but on the quantum yield.Only head-to-head cycloaddition is observed.In the case of n = 2 both the regiochemistry and the quantum yield depend strongly on the position of the methoxy group.It is concluded that the main reason for the different behavior of n = 2 is due to a through-bond effect between the two olefinic units mediated by a C2H4 bridge. Key Words: Rule of five / Photocycloaddition / Regiochemistry / Enones / Vinyl ethers

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