143139-15-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143139-15-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,1,3 and 9 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 143139-15:
(8*1)+(7*4)+(6*3)+(5*1)+(4*3)+(3*9)+(2*1)+(1*5)=105
105 % 10 = 5
So 143139-15-5 is a valid CAS Registry Number.
143139-15-5Relevant articles and documents
Pyridine-Derived Triflating Reagents: An Improved Preparation of Vinyl Triflates from Metallo Enolates.
Comins, Daniel L.,Dehghani, Ali
, p. 6299 - 6302 (1992)
Metallo enolates of ketones are trapped with an N-(2-pyridyl)triflimide at low temperatures to give vinyl triflates.