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51300-42-6

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51300-42-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 51300-42-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,3,0 and 0 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 51300-42:
(7*5)+(6*1)+(5*3)+(4*0)+(3*0)+(2*4)+(1*2)=66
66 % 10 = 6
So 51300-42-6 is a valid CAS Registry Number.

51300-42-6Relevant articles and documents

Studies towards the design and synthesis of novel 1,5-diaryl-1h-imidazole-4-carboxylic acids and 1,5-diaryl-1h-imidazole-4-carbohydrazides as host ledgf/p75 and hiv-1 integrase interaction inhibitors

Bode, Moira L.,Fish, Muhammad Q.,Mabel Coyanis, E.,Rashamuse, Thompho J.

, (2021/10/25)

Two targeted sets of novel 1,5-diaryl-1H-imidazole-4-carboxylic acids 10 and carbohy-drazides 11 were designed and synthesized from their corresponding ester intermediates 17, which were prepared via cycloaddition of ethyl isocyanoacetate 16 and diarylimi

α-Imino Iridium Carbenes from Imidoyl Sulfoxonium Ylides: Application in the One-Step Synthesis of Indoles

Burtoloso, Antonio C. B.,Caiuby, Clarice A. D.,De Jesus, Matheus P.

, p. 7433 - 7445 (2020/06/27)

Imidoyl sulfoxonium ylides are presented for the first time as potential precursors to generate α-imino metal-carbene intermediates and applied in direct C-H functionalization reactions catalyzed by [Ir(cod)Cl]2 (4 mol %) to provide 2-substituted indoles (up to 70% yield) in just one step. This class of sulfur ylide is successfully obtained from imidoyl chloride and dimethylsulfoxonium methylide (23 new examples in 45-85% yield) or by imino group formation from the corresponding β-keto sulfoxonium ylides and anilines in the presence of TiCl4 as a Lewis acid (9 examples in 33-94% yield).

The impact of cation structure upon the acidity of triazolium salts in dimethyl sulfoxide

Konstandaras, Nicholas,Dunn, Michelle H.,Guerry, Max S.,Barnett, Christopher D.,Cole, Marcus L.,Harper, Jason B.

, p. 66 - 75 (2019/12/26)

A series of triazolium salts, selected for their varying electronic and steric properties, were prepared and their pKa values were determined in DMSO at 25 °C using the bracketing indicator method. The effect of each systematic structural variation upon the acidity of the triazolium cation has been considered, in particular examining the effects of systematically altering electronic properties, quantified through the use of Hammett σ parameters. The first pKa value for an azolium salt that generates a mesionic carbene is also reported. These new data allow for the selection of appropriate bases for the deprotonation of such triazolium salts and the potential to correlate the pKa values determined herein with the nucleophilicity of the corresponding carbenes.

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