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1252763-55-5

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1252763-55-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1252763-55-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,2,7,6 and 3 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1252763-55:
(9*1)+(8*2)+(7*5)+(6*2)+(5*7)+(4*6)+(3*3)+(2*5)+(1*5)=155
155 % 10 = 5
So 1252763-55-5 is a valid CAS Registry Number.

1252763-55-5Relevant articles and documents

Direct C(sp3)–H Sulfonylation of Xanthene Derivatives with Sodium Sulfinates by Oxidative Copper Catalysis

Jiang, Huanfeng,Song, Qinghao,Sun, Yanping,Zhang, Min,Zhao, He

, p. 371 - 377 (2021/12/24)

By employing a readily available CuCl/DDQ catalyst system, we herein report a direct C(sp3)–H sulfonylation of xanthene derivates with odorless sodium sulfinates. Various 9H-xanthenes, thioxanthenes, and 9,10-dihydroacridines are efficiently transformed into the desired benzylic sulfonyl products via a radical/radical cross-coupling process, proceeding with the merits of broad substrate scope, operational simplicity, good functional group compatibility, and mild reaction conditions.

Sulfonic acid-catalyzed autoxidative carbon-carbon coupling reaction under elevated partial pressure of oxygen

Pinter, Aron,Klussmann, Martin

, p. 701 - 711 (2012/04/23)

An aerobic organocatalytic oxidative C-C bond formation reaction of benzylic C-H bonds with various C-nucleophiles is described. The coupling reaction proceeds by simply stirring the substrates under elevated partial pressure of oxygen in the presence of a sulfonic acid catalyst at room temperature. Elevation of the pressure enables the reaction of a broad scope of nucleophile substrates otherwise showing poor reactivity at ambient pressure. The benzylic C-H bonds of xanthene, acridanes, isochromane and related heterocycles could be functionalized with nucleophiles including ketones, 1,3-dicarbonyl compounds and aldehydes. Electron-rich arenes could be utilized as nucleophiles at elevated temperatures. The reactions are believed to proceed via autoxidation of the benzylic C-H bonds to the hydroperoxides and subsequent nucleophilic substitution catalyzed by sulfonic acids. Copyright

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