Cas 220278-19-3,2-bromo-2-<difluoro(methylthio)methyl>-p-chloropropiophenone

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Check Digit Verification of cas no

The CAS Registry Mumber 220278-19-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,2,7 and 8 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 220278-19:
(8*2)+(7*2)+(6*0)+(5*2)+(4*7)+(3*8)+(2*1)+(1*9)=103
103 % 10 = 3
So 220278-19-3 is a valid CAS Registry Number.

220278-19-3Upstream product

67686-88-8 1-(4-chlorophenyl)-2-methyl-3,3-bis(methylthio)-prop-2-en-1-one

220278-19-3Downstream Products

220278-25-1 2-bromo-2--p-chloropropiophenone

220278-19-3Relevant academic research and scientific papers

Building up the trifluoromethyl group: A new synthesis of α- trifluoromethylketones

Anselmi,Blazejewski,Wakselman

, p. 9651 - 9654 (1998)

α-Trifluoromethylketones were prepared from ketene dithioacetals derived from ketones, in a three step reaction involving only hydrogen fluoride and the fluoride anion as fluorinating agents.

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