33868-49-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33868-49-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,8,6 and 8 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 33868-49:
(7*3)+(6*3)+(5*8)+(4*6)+(3*8)+(2*4)+(1*9)=144
144 % 10 = 4
So 33868-49-4 is a valid CAS Registry Number.
33868-49-4Relevant academic research and scientific papers
Synthesis of 2H-Pyran-3-(6H)-ones
Skinnemoen,Kari,Undheim,Kjell
, p. 295 - 298 (2007/10/02)
5-Substituted 2H-pyran-3(6H)-ones have been synthesised by intramolecular aldol condensation of diacetonyl and acetonyl phenacyl ethers which were accessible by hydration of corresponding 2-propynyl ethers.
