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54945-19-6

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54945-19-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54945-19-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,9,4 and 5 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 54945-19:
(7*5)+(6*4)+(5*9)+(4*4)+(3*5)+(2*1)+(1*9)=146
146 % 10 = 6
So 54945-19-6 is a valid CAS Registry Number.

54945-19-6Relevant articles and documents

Palladium-catalyzed synthesis of α-diketones from acylchromates, iodoarenes, and carbon monoxide

Sakurai, Hidehiro,Tanabe, Katsuhiko,Narasaka, Koichi

, p. 168 - 169 (2000)

A three-component coupling of tetramethylammonium pentacarbonyl(acyl)chromates, aryl iodides, and CO takes place under CO atmosphere in the presence of a catalytic amount of Pd(PPh3)4 to afford the corresponding unsymmetrical α-diketones in good yield. By performing the reaction under argon atmosphere, unsymmetrical ketones are prepared instead of α-diketones.

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