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1644030-61-4

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1644030-61-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1644030-61-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,4,0,3 and 0 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1644030-61:
(9*1)+(8*6)+(7*4)+(6*4)+(5*0)+(4*3)+(3*0)+(2*6)+(1*1)=134
134 % 10 = 4
So 1644030-61-4 is a valid CAS Registry Number.

1644030-61-4Relevant articles and documents

Rhodium(I)-catalyzed cycloisomerization of benzylallene-alkynes through C-H activation

Kawaguchi, Yasuaki,Yasuda, Shigeo,Kaneko, Akira,Oura, Yuki,Mukai, Chisato

, p. 7608 - 7612 (2014/08/05)

The efficient RhI-catalyzed cycloisomerization of benzylallene-alkynes produced the tricyclo[9.4.0.03,8] pentadecapentaene skeleton through a C sp 2-H bond activation in good yields. A plausible reaction mechanism proceeds via oxidative addition of the acetylenic C-H bond to RhI, an ene-type cyclization to the vinylidenecarbene- RhI intermediate, and an electrophilic aromatic substitution with the vinylidenecarbene species. It was proposed based on deuteration and competition experiments.

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