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208940-81-2

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208940-81-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 208940-81-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,8,9,4 and 0 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 208940-81:
(8*2)+(7*0)+(6*8)+(5*9)+(4*4)+(3*0)+(2*8)+(1*1)=142
142 % 10 = 2
So 208940-81-2 is a valid CAS Registry Number.

208940-81-2Relevant articles and documents

Synthesis of chiral isoindolinones via asymmetric propargylation/lactamization cascade

Meng, Jiao-Long,Jiao, Tang-Qian,Chen, Ya-Heng,Fu, Rui,Zhang, Shu-Sheng,Zhao, Qian,Feng, Chen-Guo,Lin, Guo-Qiang

supporting information, p. 1564 - 1567 (2018/03/23)

A Zn-mediated propargylation/lactamization cascade reaction with chiral 2-formylbenzoate derived N-tert-butanesulfinyl imines was realized, which provided a practical and efficient method for the synthesis of chiral isoindolinones. High diastereoselectivities (up to 97:3 dr) and good reaction yields were observed for most examined cases.

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