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56517-83-0

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56517-83-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 56517-83-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,5,1 and 7 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 56517-83:
(7*5)+(6*6)+(5*5)+(4*1)+(3*7)+(2*8)+(1*3)=140
140 % 10 = 0
So 56517-83-0 is a valid CAS Registry Number.

56517-83-0Downstream Products

56517-83-0Relevant articles and documents

One-Pot Palladium-Catalyzed Carbonylative Sonogashira Coupling using Carbon Dioxide as Carbonyl Source

Xiong, Wenfang,Wu, Bowen,Zhu, Baiyao,Tan, Xiaobin,Wang, Lu,Wu, Wanqing,Qi, Chaorong,Jiang, Huanfeng

, p. 2843 - 2851 (2021/05/10)

Carbonylation coupling reaction has emerged as a powerful and versatile strategy for the construction of carbonyl-containing compounds in modern synthetic chemistry over the past years. Carbon dioxide, a renewable one carbon molecule, has become one of the most attractive and promising alternative carbonyl sources due to its highly abundance, nontoxicity and stability in comparison with CO in recent years. However, in most cases, a two-chamber technique was generally necessary to allow the CO-producing and CO-consuming processes to perform successfully because of the complexities and incompatibility of reaction conditions, when carbon dioxide was utilized as carbonyl source. Herein, a practical one-pot protocol using carbon dioxide as the carbonyl source for the palladium-catalyzed carbonylative Sonogashira coupling has been established, providing an expedient and practical route to a wide range of functionalized alkynones and indoxyls under mild reaction conditions. By finding a suitable catalytic system, the method allowed the CO-generating and CO-consuming processes to proceed in one pot, wherein carbon monoxide was generated in situ from the reduction of carbon dioxide in the absence of any fluoride reagents. Simple and safe operation, readily available substrates, good functional group tolerance and mild reaction conditions are the features of the method.

Convenient and general palladium-catalyzed carbonylative sonogashira coupling of aryl amines

Wu, Xiao-Feng,Neumann, Helfried,Beller, Matthias

experimental part, p. 11142 - 11146 (2012/02/03)

Bar (alky)none: A general and efficient method for carbonylative Sonogashira coupling reactions of anilines to generate alkynones has been developed (see scheme; TFP=tri(2-furyl)phosphine). The reaction proceeds under mild conditions and no base is needed

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