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189442-95-3

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189442-95-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 189442-95-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,4,4 and 2 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 189442-95:
(8*1)+(7*8)+(6*9)+(5*4)+(4*4)+(3*2)+(2*9)+(1*5)=183
183 % 10 = 3
So 189442-95-3 is a valid CAS Registry Number.

189442-95-3Relevant articles and documents

A concise and optimized four-step approach toward 2-(aryl-)alkylsulfanyl-, 4(5)-aryl-, 5(4)-heteroaryl-substituted imidazoles using alkyl- or arylalkyl thiocyanates

Laufer, Stefan A.,Liedtke, Andy J.

, p. 7199 - 7203 (2007/10/03)

A convenient cyclization method leading to trisubstituted imidazoles in up to 84% yield is reported. Diverse 1-aryl-, 2-heteroaryl-substituted ethanones are converted into the corresponding α-oximino derivatives which are reduced under regioselective cond

An efficient synthesis of tetrasubstituted imidazoles from N-(2-Oxo)- amides

Claiborne, Christopher F.,Liverton, Nigel J.,Nguyen, Kevin T.

, p. 8939 - 8942 (2007/10/03)

N-(2-Oxo)-amides were efficiently converted to tri- and tetra- substituted imidazoles under neutral reaction conditions upon treatment with neat ammonium trifluoroacetate.

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