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240417-42-9

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240417-42-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 240417-42-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,4,0,4,1 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 240417-42:
(8*2)+(7*4)+(6*0)+(5*4)+(4*1)+(3*7)+(2*4)+(1*2)=99
99 % 10 = 9
So 240417-42-9 is a valid CAS Registry Number.

240417-42-9Relevant articles and documents

Ruthenium-catalyzed oxidation of alkynes to 1,2-diketones under room temperature and one-pot synthesis of quinoxalines

Xu, Yuan,Wan, Xiaobing

supporting information, p. 642 - 645 (2013/02/23)

A ruthenium-catalyzed alkyne oxidation to 1,2-diketones using Oxone under room temperature is reported. Both substrate scope and mechanism were discussed. Notably, combination of the alkyne oxidation and condensation cyclization in one pot offers a very efficient and convenient entry into quinoxaline derivatives.

Improved Synthesis of Unsymmetrical, Heteroaromatic 1,2-Diketones and the Synthesis of Carbazole Ring Substituted Tetraaryl Cyclopentadieneones

Walsh, Christopher J.,Mandal, Braja K.

, p. 6102 - 6105 (2007/10/03)

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