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161890-43-3

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161890-43-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 161890-43-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,8,9 and 0 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 161890-43:
(8*1)+(7*6)+(6*1)+(5*8)+(4*9)+(3*0)+(2*4)+(1*3)=143
143 % 10 = 3
So 161890-43-3 is a valid CAS Registry Number.

161890-43-3Relevant articles and documents

Lewis acid-promoted alkylations of arenes and 1-trimethylsilylalkynes with β-chloro-β-thiopropanoic esters

Ishibashi,Mino,Sakata,Inada,Ikeda

, p. 1148 - 1151 (2007/10/02)

Ethyl 3-chloro-3-(3,4-dichlorophenylthio)propanoate (8) reacted with electron-rich arenes in the presence of titanium tetrachloride to give the Friedel-Crafts products 10a-13a. Reactions of 8 with 1-trimethylsilylalkynes 14a-d were effected with aluminum chloride to afford the substitution products 15a-d. Some chemical transformations of the products are also described.

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