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24897-32-3

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24897-32-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 24897-32-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,4,8,9 and 7 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 24897-32:
(7*2)+(6*4)+(5*8)+(4*9)+(3*7)+(2*3)+(1*2)=143
143 % 10 = 3
So 24897-32-3 is a valid CAS Registry Number.

24897-32-3Relevant articles and documents

Rh-Catalyzed [5+1] and [4+1] cycloaddition reactions of 1,4-enyne esters with co: A shortcut to functionalized resorcinols and cyclopentenones

Fukuyama, Takahide,Ohta, Yuko,Brancour, Celia,Miyagawa, Kazusa,Ryu, Ilhyong,Dhimane, Anne-Lise,Fensterbank, Louis,Malacria, Max

, p. 7243 - 7247 (2012)

We have developed novel Rh-catalyzed [n+1]-type cycloadditions of 1,4-enyne esters, which involve an acyloxy migration as a key step. The efficient preparation of functionalized resorcinols, including biaryl derivatives, from readily available 1,4-enyne esters and CO was achieved by Rh-catalyzed [5+1] cycloaddition accompanied by 1,2-acyloxy migration. When enyne esters had an internal alkyne moiety, the reaction proceeded by a [4+1]-type cycloaddition involving 1,3-acyloxy migration, leading to cyclopentenones.

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