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681815-56-5

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681815-56-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 681815-56-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,1,8,1 and 5 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 681815-56:
(8*6)+(7*8)+(6*1)+(5*8)+(4*1)+(3*5)+(2*5)+(1*6)=185
185 % 10 = 5
So 681815-56-5 is a valid CAS Registry Number.

681815-56-5Downstream Products

681815-56-5Relevant articles and documents

Regioselective [5,5]-sigmatropic rearrangement reactions of aryl hydrazides

Kang, Hong-Min,Lim, Young-Kwan,Shin, In-Jee,Kim, Hee-Yeon,Cho, Cheon-Gyu

, p. 2047 - 2050 (2006)

N,N′-Aryl hydrazides with substituents at the ortho or meta positions undergo highly regioselective [5,5]-sigmatropic rearrangement reactions to furnish benzidines in good to excellent isolated yields. The presence of single substituent at either the ortho or meta position provides sufficient bias, effectively suppressing the formation of diphenylene, the major byproduct of the conventional benzidine rearrangement reaction.

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