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194869-21-1

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194869-21-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 194869-21-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,4,8,6 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 194869-21:
(8*1)+(7*9)+(6*4)+(5*8)+(4*6)+(3*9)+(2*2)+(1*1)=191
191 % 10 = 1
So 194869-21-1 is a valid CAS Registry Number.

194869-21-1Downstream Products

194869-21-1Relevant articles and documents

General and facile synthesis of indoles with oxygen-bearing substituents at the benzene moiety

Kondo, Yoshinori,Kojima, Satoshi,Sakamoto, Takao

, p. 6507 - 6511 (2007/10/03)

Indoles with oxygen-bearing substituents such as a methoxy or (triisopropylsilyl)oxy group at all of the positions of the benzene moiety were synthesized by cyclization of tert-butyl methoxy(or (triisopropylsilyl)oxy)-2-((trimethylsilyl)ethynyl)phenyl)carbamates with potassium tert-butoxide in tert-butyl alcohol. The (ethynylphenyl)carbamates were synthesized by the palladium-catalyzed reaction of (trimethylsilyl)acetylene and the corresponding (iodophenyl)carbamates, which were selectively synthesized by directed lithiation of the phenylcarbamates and subsequent iodination.

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