Cas 66388-64-5,2-Cyclopenten-1-one, 2,5-diethyl-3-phenyl-

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Check Digit Verification of cas no

The CAS Registry Mumber 66388-64-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,3,8 and 8 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 66388-64:
(7*6)+(6*6)+(5*3)+(4*8)+(3*8)+(2*6)+(1*4)=165
165 % 10 = 5
So 66388-64-5 is a valid CAS Registry Number.

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66388-64-5Relevant academic research and scientific papers

Synthesis of Cyclopent-2-enones through Stepwise Cycloaddition of Simple Silyl Enol Ethers and Alk-1-ynes

Yamaguchi, Masahiko,Sehata, Michiru,Hayashi, Akio,Hirama, Masahiro

, p. 1708 - 1709 (1993)

Treatment of silyl enol ethers and alk-1-ynes with SnCl4-Bu3N reagent followed by DBU, leads to cyclopent-2-enones, through cycloaddition reactions; the initial carbon-carbon bond formation is carbometallation of alkynes, and the second step is a base-promoted intramolecular alkylation which reductively eliminates tin species (DBU = 1,8-diazabicycloundec-7-ene).

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