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52137-58-3

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52137-58-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 52137-58-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,1,3 and 7 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 52137-58:
(7*5)+(6*2)+(5*1)+(4*3)+(3*7)+(2*5)+(1*8)=103
103 % 10 = 3
So 52137-58-3 is a valid CAS Registry Number.

52137-58-3Downstream Products

52137-58-3Relevant articles and documents

Catalytic Friedel-Crafts acylation: Magnetic nanopowder CuFe 2O4 as an efficient and magnetically separable catalyst

Parella, Ramarao,Naveen,Kumar, Amit,Babu, Srinivasarao Arulananda

, p. 1738 - 1742 (2013/03/28)

Catalytic regioselective Friedel-Crafts acylation of an array of anisoles/arenes with various acid chlorides using 5-20 mol % of magnetic nanopowder CuFe2O4 is reported. Unlike the conventional Friedel-Crafts reactions, which are catalyzed by moisture sensitive homogeneous catalysts/promoters, the nanopowder CuFe2O4 catalyst is moisture insensitive and the product/ketone-catalyst isolation is easily achieved using the magnetic properties of CuFe2O4.

LIQUID-PHASE CATALYTIC OXIDATION OF 2,5-DIMETHYLDIPHENYLMETHANE AND ITS METHYL-, CHLORO-, AND NITRO-SUBSTITUTED DERIVATIVES

Pozdnyakovich, Yu. V.,Borodovitsyn, V. V.,Borodovitsyna, T. I.,Sysa, V. M.,Shein, S. M.

, p. 349 - 353 (2007/10/02)

The oxidation of 2,5-dimethyldiphenylmethane and its methyl, chloro, and nitro derivatives with oxygen in acetic acid in the presence of cobalt-manganese-bromide catalyst to benzophenone-2,5-dicarboxylic acids takes place with the intermediate formation of either 2,5-dimethylbenzophenones or products from oxidation of the methyl groups.The ratio of the oxidation paths depends on the nature of the substituent, and the contribution from the path involving initial oxidation of the methylene fragment changes with the substituents in the order 4'-CH3>H>4'-Cl>2'-Cl>4'-NO2.

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