164021-26-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 164021-26-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,4,0,2 and 1 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 164021-26:
(8*1)+(7*6)+(6*4)+(5*0)+(4*2)+(3*1)+(2*2)+(1*6)=95
95 % 10 = 5
So 164021-26-5 is a valid CAS Registry Number.
164021-26-5Relevant articles and documents
Trifluoromethyl ketones from carboxylic acids. Part II. A versatile access to trifluoromethylated heterocycles.
Biovin,El Kaim,Zard
, p. 2585 - 2592 (1995)
Various trifluoromethylated heterocycles can be prepared in good yield from carboxylic acid chlorides by reaction with pyridine and trifluoroacetic anhydride followed by capture of the intermediate trifluoroacyl ketene with suitable reagents.
