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139592-95-3

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139592-95-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139592-95-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,5,9 and 2 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 139592-95:
(8*1)+(7*3)+(6*9)+(5*5)+(4*9)+(3*2)+(2*9)+(1*5)=173
173 % 10 = 3
So 139592-95-3 is a valid CAS Registry Number.

139592-95-3Downstream Products

139592-95-3Relevant articles and documents

Synthesis and Polarographic Behavior of 2H-Isoindole-4,7-diones

Likussar, W.,Michelitsch, A.,Schubert-Zsilavecz, M.,Gusterhuber, D.

, p. 987 - 994 (1991)

2-Phenylthio-1,4-benzoquinone (1a) reacts with azomethine ylide AY-A to give 2-methyl-5-phenylthio-2H-isoindole-4,7-dione (4f).With 2-(N-methylanilino)-5-methyl-1,4-benzoquinone (1b), the azomethine ylide AY-B undergoes cycloaddition to yield an inseparable mixture of 5a-methyl-8-(N-methylanilino)-2,3,5,5a,9a,9b-hexahydro-pyrrolo-1H-isoindole-6,9-dione (5 bI) and 9a-methyl-7-(N-methylanilino)-2,3,5,5a,9a,9b-hexahydropyrrolo-1H-isoindole-6,9-dione (5 bII).The structures of 5 bI and 5 bII were established on basis of two-dimensional-NMR-techniques.The mechanism of the cycloaddition of azomethine ylides to 1,4-quinones was studied on basis of cyclovoltammetric investigations.To determine the electron affinity of the isoindoledione derivatives 4 a-f and 5 a-b the peak potentials were measured by differential pulse polarography (DPP). Keywords. 1,3-Dipolar cycloaddition; Isoindoledione derivatives; 2 D-NMR; Cyclovoltammetry; DPP.

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