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57946-71-1

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57946-71-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57946-71-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,9,4 and 6 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 57946-71:
(7*5)+(6*7)+(5*9)+(4*4)+(3*6)+(2*7)+(1*1)=171
171 % 10 = 1
So 57946-71-1 is a valid CAS Registry Number.

57946-71-1Downstream Products

57946-71-1Relevant articles and documents

Ionic Reactivity of 2-Isocyanoaryl Thioethers: Access to 2-Halo and 2-Aminobenzothia/Selenazoles

Bao, Lan,Dong, Jinhuan,Hu, Junlin,Jia, Mengying,Liu, Xiaoli,Sun, Shaoguang,Xu, Xianxiu

, (2022/02/23)

An ionic cascade insertion/cyclization reaction of thia-/selena-functionalized arylisocyanides has been successfully developed for the efficient and practical synthesis of 2-halobenzothiazole/benzoselenazole derivatives. This synthetic protocol, incorporating a halogen atom when forming the five-membered ring of benzothia/selenazoles, is different from the existing ones, where halogenation of the preformed benzothia/selenazole precursors happens. Additionally, a facile access to 2-aminobenzothiazoles is also achieved by the one-pot cascade reaction of 2-isocyanoaryl thioethers, iodine, and amines.

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