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87895-63-4

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87895-63-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87895-63-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,8,9 and 5 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 87895-63:
(7*8)+(6*7)+(5*8)+(4*9)+(3*5)+(2*6)+(1*3)=204
204 % 10 = 4
So 87895-63-4 is a valid CAS Registry Number.

87895-63-4Relevant articles and documents

An In-depth Study of the Azidobenzophenone-Anthranil-Acridone Transformation

Hawkins, David G.,Meth-Cohn, Otto

, p. 2077 - 2087 (2007/10/02)

The title transformation, particularly the conversion of anthranils into acridones, is shown to be critically sensitive to temperature, solvent, substituent, and metal catalysts.Thus the conversion of 3-(p-tolyl)anthranil into an acridone gives a ratio of 2-and 3-methyl derivatives varying from 0.6:1 to 4.7:1 with changing temperature and solvent.In other similar thermolyses, solvents (e.g. 1,2,4-trichlorobenzene) were incorporated into the product and traces of metals and their derivatives had a dramatic effect on the rate and course of the reaction.The most effective catalysts were iron powder and aluminium acetylacetonate. 3-(2,6-Disubstituted phenyl)anthranils gave acridones in which the substituents were either lost or rearranged onto N or C, the last cases involving sequential -sigmatropic shifts. 3-Thienylanthranils gave related thienoquinolones on thermolysis; again the reaction were very sensitive to catalysis.Blocked thienylanthranils also gave rearrangement products, but the non-aromatic intermediates could be isolated.

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