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1224289-08-0

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1224289-08-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1224289-08-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,4,2,8 and 9 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1224289-08:
(9*1)+(8*2)+(7*2)+(6*4)+(5*2)+(4*8)+(3*9)+(2*0)+(1*8)=140
140 % 10 = 0
So 1224289-08-0 is a valid CAS Registry Number.

1224289-08-0Relevant articles and documents

Synthetic studies connected with the preparation of N-[3-(3- cyanopyrazolo[1,5-a]pyrimidin-5-yl)phenyl]-N-ethylacetamide, a zaleplon regioisomer

Radl, Stanislav,Blahovcova, Michaela,Tkadlecova, Marcela,Havlicek, Jaroslav

experimental part, p. 1359 - 1376 (2010/10/20)

N-[3-(3-Cyanopyrazolo[1,5-a]pyrimidin-5-yl)phenyl]-N-ethyl-acetamide, a principal impurity of zaleplon, is prepared by Suzuki-Miyaura cross coupling reaction of the corresponding boronic acid and/or boronates with 5-chloropyrazolo[1,5-a]pyrimidin-3-carbonitrile (7). Various methods of preparation of both components are described, as well as approaches based on the final modification of the 5-(3-aminophenyl)-pyrazolo[1,5-a]pyrimidine-3- carbonitrile moiety prepared by Suzuki-Miyaura cross coupling. All the prepared compounds were unambiguouesly identified by NMR techniques. Spectral characteristics (IR, UV, MS) of these compounds are also given.

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