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54487-71-7

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54487-71-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54487-71-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,4,8 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 54487-71:
(7*5)+(6*4)+(5*4)+(4*8)+(3*7)+(2*7)+(1*1)=147
147 % 10 = 7
So 54487-71-7 is a valid CAS Registry Number.

54487-71-7Relevant articles and documents

Direct C-2 Carboxylation of 3-Substituted Indoles Using a Combined Br?nsted Base Consisting of LiO-tBu/CsF/18-crown-6

Shigeno, Masanori,Tohara, Itsuki,Nozawa-Kumada, Kanako,Kondo, Yoshinori

, p. 1987 - 1991 (2020)

Herein, we report that a combination of LiO-tBu, CsF, and 18-crown-6 can be used to carry out the carboxylation of indole derivatives at the C-2 position under an ambient CO2 atmosphere. Substrates bearing an electrophilic substituent (i.e., cyano, formyl, benzoyl, phenylsulfonyl, phenylsulfinyl, and chloride) at the C-3 position are smoothly converted into their corresponding carboxylated products with high functional group compatibility.

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