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172264-69-6

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172264-69-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 172264-69-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,2,6 and 4 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 172264-69:
(8*1)+(7*7)+(6*2)+(5*2)+(4*6)+(3*4)+(2*6)+(1*9)=136
136 % 10 = 6
So 172264-69-6 is a valid CAS Registry Number.

172264-69-6Relevant articles and documents

Electrochemical Palladium-Catalyzed Oxidative Sonogashira Carbonylation of Arylhydrazines and Alkynes to Ynones

Cao, Yue,Hu, Jingcheng,Lei, Aiwen,Li, Haoran,Shi, Renyi,Wu, Yong,Xu, Minghao,Yi, Hong,Zeng, Li

supporting information, p. 12460 - 12466 (2021/08/24)

Oxidative carbonylation using carbon monoxide has evolved as an attractive tool to valuable carbonyl-containing compounds, while mixing CO with a stoichiometric amount of a chemical oxidant especially oxygen is hazardous and limits its application in scale-up synthesis. By employing anodic oxidation, we developed an electrochemical palladium-catalyzed oxidative carbonylation of arylhydrazines with alkynes, which is regarded as an alternative supplement of the carbonylative Sonogashira reaction. Combining an undivided cell with constant current mode, oxygen-free conditions avoids the explosion hazard of CO. A diversity of ynones are efficiently obtained using accessible arylhydrazines and alkynes under copper-free conditions. A possible mechanism of the electrochemical Pd(0)/Pd(II) cycle is rationalized based upon cyclic voltammetry, kinetic studies, and intermediates experiments.

Nickel (II) dibenzotetramethyltetraaza[14]annulene supported on DFNS nanoparticles catalyst in carbonylative sonogashira coupling

Mohsen Sadeghzadeh, Seyed,Tian, Shaopeng,Yang, Qianqian

, (2021/01/18)

In this study, the carbonylative sonogashira coupling reaction was performed in the presence of CO (2 MPa) and Nitmtaa?DFNS as NPs. Nickel(II)dibenzotetramethyltetraaza[14]annulene complex (Nitmtaa) prepared and immobilized on amino-fucntionnalized DFNS (N-DFNS) via Ni[sbnd]N (NH2) bond to obtain a stable and reusable new nanocatalyst named as Nitmtaa?DFNS. Good to superb performance products were provided deploying Nitmtaa?DFNS nanocatalyst. In addition, the anatomy of Nitmtaa?DFNS has been distinguished by various methods, including XRD, VSM, FT-IR, SEM, EDX, TEM, and TGA. In addition, the hot filtration test provided complete insight into the heterogeneity of the catalyst. The reuse and recycling of the catalyst were repeatedly investigated for coupling reactions. In addition, the mechanism of the coupling reactions was thoroughly studied.

Palladium-catalyzed carbonylative Sonogashira cross-coupling for the synthesis of alkynones with formic acid as the CO source

Lyu, Xue,Sun, Guanglong,Zhou, Yang,Wang, Yingying,Lei, Min,Wu, Wanying,Guo, Dean

, p. 309 - 315 (2019/01/21)

Abstract: A practical and efficient palladium-catalyzed carbonylative Sonogashira cross-coupling reaction for the synthesis of alkynones from aryl iodides, alkynes, and formic acid as the CO source has been described. Under the assistance of PPh3/I2, formic acid can be used as the CO source for synthesis of alkynones in moderate–good yields. Furthermore, it is also successfully applied for the modification of natural products, such as vindoline and tabersonin, to obtain the corresponding products.

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