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881677-39-0

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881677-39-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 881677-39-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,8,1,6,7 and 7 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 881677-39:
(8*8)+(7*8)+(6*1)+(5*6)+(4*7)+(3*7)+(2*3)+(1*9)=220
220 % 10 = 0
So 881677-39-0 is a valid CAS Registry Number.

881677-39-0Relevant articles and documents

A facile total synthesis of imatinib base and its analogues

Liu, Yi-Feng,Wang, Cui-Ling,Bai, Ya-Jun,Han, Ning,Jiao, Jun-Ping,Qi, Xiao-Li

, p. 490 - 495 (2008)

Imatinib and its analogues were successfully synthesized by an improved method in 19.5-46.2% total yield of six main steps. Pyrimidinyl amine was prepared by the reaction of enaminone and guanidine nitrate without the use of a toxic cyanamide. N-(2-Methyl-5-nitrophenyl)-4-(pyridin-3-yl) pyrimidin-2-amine as a key intermediate for the synthesis of imatinib was prepared by coppercatalyzed iV-arylation of heteroarylamme in 82% yield. The copper salts were used instead of the expensive palladium compounds in this C-N bond-forming reaction. The intermediate nitro compound was reduced by a N2H 4.H2O/FeCl3/C system using water as a solvent in good yield.

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