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71516-10-4

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71516-10-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 71516-10-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,5,1 and 6 respectively; the second part has 2 digits, 1 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 71516-10:
(7*7)+(6*1)+(5*5)+(4*1)+(3*6)+(2*1)+(1*0)=104
104 % 10 = 4
So 71516-10-4 is a valid CAS Registry Number.

71516-10-4Relevant articles and documents

The conversion of mixed N,O-diacylated 2-aminophenols to 2-substituted benzoxazoles

DeLuca, Mark R.,Taraporewala, Irach B.,Kerwin, Sean M.

, p. 979 - 982 (2007/10/03)

When N,O-diacylated 2-aminophenols that have different acyl substituents on nitrogen and oxygen are treated with p-toluenesulfonic acid in refluxing xylenes, mixtures of benzoxazoles are produced. The major product is the benzoxazole in which the substituent at the 2-position is derived from the acyl group on nitrogen. This product may arise from an unusual case of acid- mediated neighboring amido-group assisted hydrolysis.

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