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1019019-27-2

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1019019-27-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1019019-27-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,1,9,0,1 and 9 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1019019-27:
(9*1)+(8*0)+(7*1)+(6*9)+(5*0)+(4*1)+(3*9)+(2*2)+(1*7)=112
112 % 10 = 2
So 1019019-27-2 is a valid CAS Registry Number.

1019019-27-2Relevant articles and documents

Cyclodeshydratation d'aryloxy-2 diaryl-1,2 ethanones en diaryl-2,3 benzofurannes. Influence de la substitution sur la competition entre deux chemins reactionnels

Montfort, Bernard,Laude, Bernard,Vebrel, Joel,Cerutti, Ernest

, p. 848 - 854 (2007/10/02)

Many of the methods for synthesizing derivatives of 2,3-diaryl benzofurans imply cyclodehydration of 1,2-diaryl 2-aryloxyethanones, leading often to a mixture of two isomers which differ by the presence of the aryl substituent at positions C-2 or C-3 of benzofuran.This isomerisation is explained by a competition between two possible mechanisms.Either a direct electrophilic substitution or the intermediate formation of an α-acylcarbenium ion.This study deals with the competition as determined by the substitution of aryl groups in the initial substrate.Each 2,3-diarylbenzofuran was synthesized previously using an unambiguous method.

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