221177-56-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221177-56-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,7 and 7 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 221177-56:
(8*2)+(7*2)+(6*1)+(5*1)+(4*7)+(3*7)+(2*5)+(1*6)=106
106 % 10 = 6
So 221177-56-6 is a valid CAS Registry Number.
InChI:InChI=1/C21H19ClF3NO2/c1-28-17-7-4-15(5-8-17)13-26-19-9-6-16(22)12-18(19)20(27,21(23,24)25)11-10-14-2-3-14/h4-9,12,14,26-27H,2-3,13H2,1H3
221177-56-6Relevant articles and documents
NHC-Copper(I) Halide-Catalyzed Direct Alkynylation of Trifluoromethyl Ketones on Water
Czerwiński, Pawe?,Molga, Edyta,Cavallo, Luigi,Poater, Albert,Michalak, Micha?
supporting information, p. 8089 - 8094 (2016/06/13)
An efficient and easily scalable NHC-copper(I) halide-catalyzed addition of terminal alkynes to 1,1,1-trifluoromethyl ketones, carried out on water for the first time, is reported. A series of addition reactions were performed with as little as 0.1-2.0?mo