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1021126-27-1

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1021126-27-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1021126-27-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,1,1,2 and 6 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1021126-27:
(9*1)+(8*0)+(7*2)+(6*1)+(5*1)+(4*2)+(3*6)+(2*2)+(1*7)=71
71 % 10 = 1
So 1021126-27-1 is a valid CAS Registry Number.

1021126-27-1Relevant articles and documents

Copper-catalyzed intramolecular N-arylation of ureas in water: a novel entry to benzoimidazolones

Barbero, Nekane,Carril, Mónica,SanMartin, Raul,Domínguez, Esther

, p. 7283 - 7288 (2008/09/21)

The copper-catalyzed intramolecular N-arylation of 2-bromoarylureas performed in water leading to the benzo[d]imidazolone framework is reported. The scope of the methodology presented herein proved to?be broad and afforded a significant number of benzoimidazolones in good to excellent yields. The reported protocol is based on the use of CuI and TMEDA acting both as the ligand and as the base in a water solution, which allows for the easy separation of the catalyst containing aqueous phase from the products by simple extraction. Additionally, the N- versus O-arylation competitive processes are also discussed.

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