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81540-92-3

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81540-92-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81540-92-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,4 and 0 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 81540-92:
(7*8)+(6*1)+(5*5)+(4*4)+(3*0)+(2*9)+(1*2)=123
123 % 10 = 3
So 81540-92-3 is a valid CAS Registry Number.

81540-92-3Relevant articles and documents

SITE SELECTIVE EFFECT OF N-OXIDE FUNCTION TO METHYL GROUPS ON SIX-MEMBERED N-HETEROAROMATICS

Sakamoto, Takao,Yoshizawa, Hiroshi,Yamanaka, Hiroshi,Goto, Yoshinobu,Niiya, Tokihiro,Honjo, Noriko

, p. 73 - 76 (2007/10/02)

Reaction of 2,4-dimethylpyridine 1-oxide with ethyl benzoate under basic conditions afforded 4-methyl-2-phenacylpyridine 1-oxide, while the same reaction of 2,4-dimethylpyridine itself is known to afford 2-methyl-4-phenacylpyridine.Concerning the above contrast, the effect of N-oxide function to the relative reactivity of the 2- and 4-methyl group was investigated on pyridine, quinoline, pyrimidine, and quinazoline homologues.The higher reactivity of α-methyl groups was concluded to be general in the N-oxides of these N-heteroaromatics.

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