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81720-88-9

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81720-88-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81720-88-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,7,2 and 0 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81720-88:
(7*8)+(6*1)+(5*7)+(4*2)+(3*0)+(2*8)+(1*8)=129
129 % 10 = 9
So 81720-88-9 is a valid CAS Registry Number.

81720-88-9Downstream Products

81720-88-9Relevant academic research and scientific papers

Copper and L-(?)-quebrachitol catalyzed hydroxylation and amination of aryl halides under air

Bao, Xuefei,Chen, Guoliang,Dong, Jinhua,Du, Fangyu,Li, Hui,Liang, Xinjie,Wu, Ying,Zhang, Yongsheng

, (2020)

L-(?)-Quebrachitol, a natural product obtained from waste water of the rubber industry, was utilized as an efficient ligand for the copper-catalyzed hydroxylation and amination of aryl halides to selectively give phenols and aryl amines in water or 95percent ethanol. In addition, the hydroxylation of 2-chloro-4-hydroxybenzoic acid was validated on a 100-g scale under air.

Application of quebrachitol in hydrolysis reaction of copper-catalyzed aryl halide

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Paragraph 0057-0059, (2019/07/16)

The invention belongs to the technical field of drug synthesis, and provides application of quebrachitol in a hydrolysis reaction of a copper-catalyzed aryl halide. According to the hydrolysis reaction, copper serves as a catalyst, quebrachitol serves as a ligand, and the hydrolysis reaction is carried out on the aryl halide. The invention further provides a catalytic system of the hydrolysis reaction of the aryl halide. The reaction system comprises the copper catalyst, the quebrachitol, alkali and water, and the system is environmentally friendly and is suitable for industrial application.

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