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66940-00-9

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66940-00-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 66940-00-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,9,4 and 0 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 66940-00:
(7*6)+(6*6)+(5*9)+(4*4)+(3*0)+(2*0)+(1*0)=139
139 % 10 = 9
So 66940-00-9 is a valid CAS Registry Number.

66940-00-9Upstream product

66940-00-9Relevant academic research and scientific papers

N-propargylic β-enaminones: Common intermediates for the synthesis of polysubstituted pyrroles and pyridines

Cacchi, Sandro,Fabrizi, Giancarlo,Filisti, Eleonora

, p. 2629 - 2632 (2008)

N-Propargylic β-enaminones have been used as common intermediates for the synthesis of polysubstituted pyrroles and pyridines. Best results have been obtained using DMSO as solvent. In the presence of Cs2CO3 N-propargylic β-enaminone

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