75448-71-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 75448-71-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,4,4 and 8 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 75448-71:
(7*7)+(6*5)+(5*4)+(4*4)+(3*8)+(2*7)+(1*1)=154
154 % 10 = 4
So 75448-71-4 is a valid CAS Registry Number.
75448-71-4Relevant articles and documents
Synthesis of 5,7a-Didehydroheliotridin-3-one, the Basis Compound of a New Class of Pyrrolizidine Alkaloids
Klose, Walter,Nickisch, Klaus,Bohlmann, Ferdinand
, p. 2694 - 2698 (2007/10/02)
Starting with the disubstituted pyrrole derivative 4c the title compound 12b was synthesized in three steps in 40percent overall yield using the Bestmann reaction with (triphenylphosphoranylidene)ketene (6).
