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138478-13-4

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138478-13-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138478-13-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,4,7 and 8 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 138478-13:
(8*1)+(7*3)+(6*8)+(5*4)+(4*7)+(3*8)+(2*1)+(1*3)=154
154 % 10 = 4
So 138478-13-4 is a valid CAS Registry Number.

138478-13-4Relevant articles and documents

Preparation of new 2,4-disubstituted oxazoles from N-acylaziridines

Eastwood, Frank W.,Perlmutter, Patrick,Yang, Qi

, p. 35 - 42 (2007/10/03)

The efficiency of the ring enlargement of 2-substituted N-acylaziridines to dihydrooxazoles followed by nickel peroxide oxidation to give 2,4-disubstituted oxazoles as a synthetic route is examined. Sodium iodide-promoted ring enlargements work well for N-acylaziridines bearing electron-donating 2-substituents. For N-acylaziridines bearing electron-withdrawing 2-substituents, the best results are obtained using acid-promoted rearrangement.

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