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204444-54-2

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204444-54-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 204444-54-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,4,4 and 4 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 204444-54:
(8*2)+(7*0)+(6*4)+(5*4)+(4*4)+(3*4)+(2*5)+(1*4)=102
102 % 10 = 2
So 204444-54-2 is a valid CAS Registry Number.

204444-54-2Relevant articles and documents

A convenient approach to the synthesis of the imidazo[5,1-b]oxazole ring system

Salgado-Zamora, Hector,Campos, Elena,Jimenez, Rogelio,Sanchez-Pavon, Esmeralda,Cervantes, Humberto

, p. 1081 - 1090 (2007/10/03)

Reaction of 4(5)-bromo-2-methyl-5(4)-nitroimidazole with phenacyl bromide derivatives led to 4-bromo-2-methyl-1-phenacyl-5-nitro- and 5-bromo- 2-methyl-1-phenacyl-4-nitroimidazoles. Treatment of the latter isomers with potassium tert-butoxide in dry THF y

Synthesis of some 5-amino-2-methyl-4-nitro-1-phenacylimidazoles

Sobiak

, p. 78 - 83 (2007/10/03)

Reaction of 4(5)-bromo-2-methyl-5(4)-nitroimidazole with phenacyl bromide derivatives gave two isomers: 4-bromo-5-nitroimidazoles (4a-e) and 5-bromo-4-nitroimidazoles (5a-e). Compounds 5a-e were treated with cyclic secondary amines to afford expected 5-amino-4-nitroimidazole derivatives 6a-c - 10a-b.

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