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28128-12-3

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28128-12-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28128-12-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,1,2 and 8 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 28128-12:
(7*2)+(6*8)+(5*1)+(4*2)+(3*8)+(2*1)+(1*2)=103
103 % 10 = 3
So 28128-12-3 is a valid CAS Registry Number.

28128-12-3Relevant articles and documents

Synthesis of indoles through acceptorless dehydrogenative coupling catalyzed by nickel on silica-alumina

Charvieux, Aubin,Hammoud, Abdul Aziz,Duclos, Marie-Christine,Duguet, Nicolas,Métay, Estelle

, (2021/07/25)

The high atom-economical formation of indoles from anilines and diols was described with affordable and easy to handle Ni/SiO2-Al2O3. After optimization, 2,3-dimethylindole was isolated with an excellent 98% yield in neat conditions. The scope of the reaction was studied and 13 indoles were isolated in 16–80% yields.

Pyrazine Radical Cations as a Catalyst for the Aerobic Oxidation of Amines

Brisar, Rok,Hollmann, Dirk,Mejia, Esteban

, p. 5391 - 5398 (2017/10/06)

An efficient and green synthetic method for the preparation of N,N-disubstituted tetramethylpyrazinium radical cations was developed, which does not require any solvent or strong alkylating agents. The investigation by UV/Vis and electron paramagnetic res

Heteroannulation of arynes with N-aryl-α-aminoketones for the synthesis of unsymmetrical N-aryl-2,3-disubstituted indoles: An aryne twist of Bischler-Moehlau indole synthesis

Bunescu, Ala,Piemontesi, Cyril,Wang, Qian,Zhu, Jieping

supporting information, p. 10284 - 10286 (2013/10/22)

Reaction of 2-(trimethylsilyl)aryl triflates 1 with N-aryl-α-amino ketones 2 afforded N-aryl-2,3-disubstituted indoles in good to excellent yields with complete control of the substitution patterns. This methodology allowed for the first time a one-step s

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