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53256-22-7

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53256-22-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 53256-22-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,2,5 and 6 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 53256-22:
(7*5)+(6*3)+(5*2)+(4*5)+(3*6)+(2*2)+(1*2)=107
107 % 10 = 7
So 53256-22-7 is a valid CAS Registry Number.

53256-22-7Relevant articles and documents

Facile synthesis of aziridines from imines and diazoesters or aldehydes, amines, and diazoesters using a catalytic amount of lanthanide triflate

Nagayama, Satoshi,Kobayashi, Shu

, p. 685 - 686 (1998)

In the presence of a catalytic amount of lanthanide triflate (Ln(OTf)3), imines reacted with ethyl diazoester in hexane at room temperature to afford the corresponding aziridines in high yields with high diastereoselectivities. Based on these r

Copper-Mediated One-Pot Synthesis of Indoles through Sequential Hydroamination and Cross-Dehydrogenative Coupling Reaction

Cai, Yichao,Chen, Chunxia,Chen, Xin,Liu, Yajie,Peng, Jinsong,Song, Zirui,Sun, Peng,Yang, Jiaojiao

, p. 75 - 84 (2019/12/26)

Starting from simple anilines and ester arylpropiolates, an efficient one-pot synthesis of 2-arylindole-3-carboxylate derivatives has been developed through copper-mediated sequential hydroamination and cross-dehydrogenative coupling (CDC) reaction. The i

Alkynyl Fischer Carbenes as a Platform for the Production of Difluorodiazaborinine Complexes via β-Amino-azadienes

Benítez-Puebla, Luis J.,López, Julio,Flores-álamo, Marcos,Cruz, David Cruz,Pe?a-Cabrera, Eduardo,Delgado, Francisco,Tamariz, Joaquín,Vázquez, Miguel A.

, p. 6571 - 6578 (2019/10/22)

The results of a study of the reactivities of alkynyl Fischer carbenes in the syntheses of diazaborinine derivatives 7a-i are reported. The strategy employed included the use of β-amino-α,β-unsaturated carbenes (3a–j) with different amines in order to determine the scope of a previously unknown catalytic reaction in the presence of copper salts and anilines. The reaction was highly stereoselective, yielding (Z)-isomers of the β-amino-1-azadiene framework as the main products (4a–o). As an extension of this research, the compounds 4a–o proved to be suitable precursors for the syntheses of diazaborinine scaffolds in good yields (7a-i).

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