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2033-35-4

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2033-35-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2033-35-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,0,3 and 3 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 2033-35:
(6*2)+(5*0)+(4*3)+(3*3)+(2*3)+(1*5)=44
44 % 10 = 4
So 2033-35-4 is a valid CAS Registry Number.

2033-35-4Downstream Products

2033-35-4Relevant articles and documents

Lithiation of 1-arylimidazol-2(1H)-ones and 1-aryl-4,5-dihydroimidazol- 2(1H)-ones

Llopart, Carme Cantos,Ferrer, Conchita,Joule, John A.

, p. 1649 - 1661 (2007/10/03)

1-Arylimidazol-2(1H)-ones are shown to be readily lithiated, using 2 mol equiv. of n-butyllithium, on the benzene ring, ortho to the heterocycle. 1-Aryl-4,5-dihydroimidazol-2(1H)-ones also undergo metalation on the aromatic substitutuent ortho to the heterocycle, but less efficiently. 1-Aryl-3-methylimidazol-2(1H)-ones are lithiated on the heterocyclic ring and then on the benzene ring ortho to the heterocycle. No ortho-directing effect was found for 1-aryl-4,5-dihydro-3-methylimidazol-2(1H)-ones.

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