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42353-58-2

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42353-58-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 42353-58-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,3,5 and 3 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 42353-58:
(7*4)+(6*2)+(5*3)+(4*5)+(3*3)+(2*5)+(1*8)=102
102 % 10 = 2
So 42353-58-2 is a valid CAS Registry Number.

42353-58-2Relevant articles and documents

A process for the preparation of sodium compound handkerchief auspicious past cloth and wherein the intermediate impurity, preparation method and application

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Paragraph 0063, (2017/02/24)

The invention provides parecoxib sodium which is prepared by controlling an intermediate impurity and in particular provides a preparation method of a parecoxib sodium compound as well as the intermediate impurity and an application of the parecoxib sodium compound. According to the preparation method provided by the invention, 3-methyl-4,5-diphenyl-4,5-dihydro-isoxazole-5-alcohol is used as an isomer impurity for preparing 5-methyl-3,4-diphenyl-4,5-dihydro-isoxazole-5-alcohol as an intermediate of the parecoxib sodium, the quality of the 3-methyl-4,5-diphenyl-4,5-dihydro-isoxazole-5-alcohol is controlled in the preparation of the parecoxib sodium, specifically, the impurity content is required not to be higher than 0.5 percent, and an important significance is provided for the product quality of the parecoxib sodium; by obtaining the 3-methyl-4,5-diphenyl-4,5-dihydro-isoxazole-5-alcohol as an isomer impurity of the important 5-methyl-3,4-diphenyl-4,5-dihydro-isoxazole-5-alcohol and further studying 3-methyl-4,5-diphenyl-4,5-dihydro-isoxazole-5-alcohol in the aspects of preparation process, detection process and purification process, important quality monitoring significance is provided for the process with the 5-methyl-3,4-diphenyl-4,5-dihydro-isoxazole-5-alcohol as an industrial production raw material.

NOVEL CATALYSTS

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Page/Page column 53-54, (2012/06/01)

The present invention provides novel compounds and ligands that are useful in transition metal catalyzed cross-coupling reactions. For example, the compounds and ligands of the present invention are useful in palladium or gold catalyzed cross-coupling reactions.

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