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66421-39-4

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66421-39-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 66421-39-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,4,2 and 1 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 66421-39:
(7*6)+(6*6)+(5*4)+(4*2)+(3*1)+(2*3)+(1*9)=124
124 % 10 = 4
So 66421-39-4 is a valid CAS Registry Number.

66421-39-4Relevant articles and documents

Electrophilic cyanations. I. Synthesis of thiocyanato-heteroarenes and tosylheteroarenes from mercapto-heteroarenes using p-toluenesulfonyl cyanide

Miyashita, Akira,Nagasaki, Izuru,Kawano, Akiko,Suzuki, Yumiko,Iwamoto, Ken-Ichi,Higashino, Takeo

, p. 745 - 755 (1997)

Mercaptoheteroarenes (1) underwent electrophilic cyanation with p-toluenesulfonyl cyanide (TsCN) in THF in the presence of NaH to give the corresponding thiocyanatoheteroarenes (2) in moderate to good yields. In DMF, tosylheteroarenes (4) were formed by substitution with p-toluenesulfinate ion through thiocyanatoheteroarenes (2).

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