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19997-66-1

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19997-66-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19997-66-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,9,9 and 7 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 19997-66:
(7*1)+(6*9)+(5*9)+(4*9)+(3*7)+(2*6)+(1*6)=181
181 % 10 = 1
So 19997-66-1 is a valid CAS Registry Number.

19997-66-1Relevant articles and documents

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Sokolov,V.I. et al.

, p. 271 - 282 (1978)

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Facile Synthesis of β-Bromostyrenes by Direct Bromination of Styrenes with N -Bromosuccinimide and Sodium Persulfate

Chen, Xuenian,Gao, Yan,Jing, Yi,Ma, Yan-Na,Zhao, Qianyi

supporting information, (2020/09/09)

A new, direct, efficient, and transition-metal-free method is reported for the synthesis of β-bromostyrenes from styrenes by using N -bromosuccinimide as the brominating reagent and sodium persulfate (Na 2S 2O 8) as the oxidant. This convenient and concise reaction is practical, operationally simple, and can be adapted for large-scale syntheses.

Halogenation of 1,1-diarylethylenes by N-halosuccinimides

Zhang, Ge,Bai, Rui-Xue,Li, Chu-Han,Feng, Chen-Guo,Lin, Guo-Qiang

supporting information, p. 1658 - 1662 (2018/12/11)

An efficient method for the preparation of 2,2-diarylvinyl halides from the corresponding 1,1-diarylethylenes has been developed. N-Halosuccinimides (N-bromosuccinimide or N-chlorosuccinimide) were used as the halogenation reagents. The practicability of this method is highlighted by its simple operation, broad substrate scope and capability for large-scale reaction.

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