156909-00-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156909-00-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,9,0 and 9 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 156909-00:
(8*1)+(7*5)+(6*6)+(5*9)+(4*0)+(3*9)+(2*0)+(1*0)=151
151 % 10 = 1
So 156909-00-1 is a valid CAS Registry Number.
156909-00-1Relevant articles and documents
Synthesis of 2-polyfluoroalkylated thiochromones and chromones
Tamura, Kazushige,Ishihara, Takashi,Yamanaka, Hiroki
, p. 25 - 32 (1994)
A number of 2-(polyfluoroalkyl)-thiochromones (4) and -chromones (5) have been synthesized in good to excellent yield by an intramolecular Friedel-Crafts acylation of the Z isomers of 3-(arylthio)- (2) and 3-(aryloxy)polyfluoro-2-alkenoic acids (3), which
