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57891-96-0

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57891-96-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57891-96-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,8,9 and 1 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 57891-96:
(7*5)+(6*7)+(5*8)+(4*9)+(3*1)+(2*9)+(1*6)=180
180 % 10 = 0
So 57891-96-0 is a valid CAS Registry Number.

57891-96-0Relevant articles and documents

Copper-catalyzed [2+3]-annulation of N-H imines with vinyl azides: Access to polyaryl 2: H -imidazoles

Zhu, Zhongzhi,Lin, Hanze,Liang, Baihui,Huang, Junjie,Liang, Wanyi,Chen, Lu,Huang, Yubing,Chen, Xiuwen,Li, Yibiao

supporting information, p. 5621 - 5624 (2020/06/19)

A practical method for the synthesis of 2H-imidazoles via a [2+3] annulation of N-H imines with vinyl azides using a copper catalyst is developed. In this conversion, environmentally friendly oxygen is used as the sole oxidant and N2 and H2O are the only by-products. The catalytic transformation, operating under mild conditions, is operationally simple and is considered as a readily available catalytic system having good substrate and functional compatibility with high atom-efficiency without the need for additional ligands or additives.

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