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108981-53-9

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108981-53-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 108981-53-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,8,9,8 and 1 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 108981-53:
(8*1)+(7*0)+(6*8)+(5*9)+(4*8)+(3*1)+(2*5)+(1*3)=149
149 % 10 = 9
So 108981-53-9 is a valid CAS Registry Number.

108981-53-9Relevant articles and documents

C?H Methylation of Iminoamido Heterocycles with Sulfur Ylides**

Ghosh, Prithwish,Kwon, Na Yeon,Kim, Saegun,Han, Sangil,Lee, Suk Hun,An, Won,Mishra, Neeraj Kumar,Han, Soo Bong,Kim, In Su

supporting information, p. 191 - 196 (2020/10/29)

The direct methylation of N-heterocycles is an important transformation for the advancement of pharmaceuticals, agrochemicals, functional materials, and other chemical entities. Herein, the unprecedented C(sp2)-H methylation of iminoamido heterocycles as nucleoside base analogues is described. Notably, trimethylsulfoxonium salt was employed as a methylating agent under aqueous conditions. A wide substrate scope and excellent level of functional-group tolerance were attained. Moreover, this method can be readily applied to the site-selective methylation of azauracil nucleosides. The feasibility of gram-scale reactions and various transformations of the products highlight the synthetic potential of the developed method. Combined deuterium-labeling experiments aided the elucidation of a plausible reaction mechanism.

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