139417-31-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139417-31-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,4,1 and 7 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 139417-31:
(8*1)+(7*3)+(6*9)+(5*4)+(4*1)+(3*7)+(2*3)+(1*1)=135
135 % 10 = 5
So 139417-31-5 is a valid CAS Registry Number.
139417-31-5Relevant articles and documents
The use of trans-2,3-divinyl epoxides as precursors to carbonyl ylides
Chou, Whe-Narn,White, James B.
, p. 7637 - 7640 (1991)
trans-2,3-Divinyl epoxides have been found to be good substrates for the generation of carbonyl ylides in CCl4 and 145 °C. These ylides, to a limited extent, undergo isomerization to cis-2,3-v divinyl epoxides, leading to the isolation of 4,5-d
