Cas 111505-20-5,3-acetyl-5-phenylazotropolone

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Check Digit Verification of cas no

The CAS Registry Mumber 111505-20-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,5,0 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 111505-20:
(8*1)+(7*1)+(6*1)+(5*5)+(4*0)+(3*5)+(2*2)+(1*0)=65
65 % 10 = 5
So 111505-20-5 is a valid CAS Registry Number.

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111505-27-2 3-methyl-5-phenylazo-8H-cycloheptisoxazol-8-one

111505-20-5Relevant articles and documents

Synthesis and Reactions of Halo-, Nitro-, and Arylazo-substituted 3-Acetyltropolones. Formation of Heterocycle-fused Troponoid Compounds

Li, Zhi-Hong,Jin, Zhong-Tian,Yin, Bing-Zhu,Imafuku, Kimiaki

, p. 779 - 783 (2007/10/02)

3-Acetyltropolone (1) reacted with bromine, iodine, and nitric acid to afford respectively 3-acetyl-5,7-dibromotropolone (2), 3-acetyl-7-iodotropolone (3), and 3-acetyl-5-nitro- (4) and 3-acetyl-5,7-dinitrotropolone (5).Azo-coupling reactions of 1 gave 3-

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111505-20-5