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252053-94-4

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252053-94-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 252053-94-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,2,0,5 and 3 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 252053-94:
(8*2)+(7*5)+(6*2)+(5*0)+(4*5)+(3*3)+(2*9)+(1*4)=114
114 % 10 = 4
So 252053-94-4 is a valid CAS Registry Number.

252053-94-4Relevant articles and documents

Facile synthesis of substituted phenanthroline ligands by samarium-promoted coupling of phenanthroline with ketones.

O'Neill,Helquist

, p. 1659 - 1662 (1999)

[formula: see text] 1,10-Phenanthroline undergoes coupling with ketones promoted by samarium diiodide to produce 2-(1-hydroxyalkyl)-1,10-phenanthrolines. O-Methylation of these derivatives provides the corresponding 2-(1-methoxyalkyl)phenanthrolines. Deme

Process for 1,10-phenanthroline ligands

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Page column 13, (2010/02/06)

Process for preparing 1,10-phenanthroline ligands represented by the formula which comprises coupling a 1,10-phenanthroline of the formula with a ketone e.g. a dialkyl, cycloalkyl or bicycloalkyl ketone with a metal coupling reagent, preferably a lanthani

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