219951-11-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219951-11-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,9,5 and 1 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 219951-11:
(8*2)+(7*1)+(6*9)+(5*9)+(4*5)+(3*1)+(2*1)+(1*1)=148
148 % 10 = 8
So 219951-11-8 is a valid CAS Registry Number.
219951-11-8Relevant academic research and scientific papers
A new method for the preparation of 2,3-diaryl-1,1-difluoro-1,3-butadienes
Jeong,Young Sam Park,Min Wook Chung,Bum Tae Kim
, p. 2261 - 2270 (2007/10/03)
Reactions of 1-trifluoromethyl-1,2-diarylvinyl sulfones 3 with aryllithium afforded aryl substituted adduct 4. Bromination of 4 with NBS, followed by debromofluorination with Mg, provided 2,3-diaryl-1,1-difluoro-1,3-butadienes (6) in good yields.
