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870257-99-1

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870257-99-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 870257-99-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,0,2,5 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 870257-99:
(8*8)+(7*7)+(6*0)+(5*2)+(4*5)+(3*7)+(2*9)+(1*9)=191
191 % 10 = 1
So 870257-99-1 is a valid CAS Registry Number.

870257-99-1Relevant articles and documents

An efficient synthesis of 4,6-substituted pyrrolo[3,2-d]pyrimidines by silver-catalyzed cyclization of acetylene amine

Xie, Rui,Hu, Ying,Wan, Huixin,Hu, Yanwei,Chen, Shaohua,Zhang, Shilei,Zhang, Yinan

supporting information, p. 2418 - 2421 (2016/05/19)

A silver catalyzed cyclization of acetylene amine was developed to synthesize 4,6-substituted pyrrolo[3,2-d]pyrimidine, a bioactive isosteric scaffold of purine. Starting from simple commercially available acetylenes and pyrimidines, the method was found

Preparation of substituted pyrimido[4,5-b]-1,4-benzoxazepines, thiazepines, and diazepines via a Pictet-Spengler cyclization

Duncton, Matthew A. J.,Smith II, Leon M.,Burdzovic-Wizeman, Sabina,Burns, Aaron,Hu Liu, Yunyu Mao,Wong, Wai C.,Kiselyov, Alexander S.

, p. 9629 - 9631 (2007/10/03)

A synthesis of the title compounds, which have found use as inhibitors of certain receptor tyrosine kinases, was achieved using a Pictet-Spengler cyclization as a key step.

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