39720-65-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 39720-65-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,9,7,2 and 0 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 39720-65:
(7*3)+(6*9)+(5*7)+(4*2)+(3*0)+(2*6)+(1*5)=135
135 % 10 = 5
So 39720-65-5 is a valid CAS Registry Number.
39720-65-5Relevant academic research and scientific papers
Mechanism of Wittig reaction with cyclic anhydrides
Kayser, Margaret M.,Hatt, Krista L.,Hooper, Donald L.
, p. 1985 - 1996 (2007/10/02)
The reactions of stabilized phosphoranes with cyclic anhydrides give enol-lactones as final products.The inital condensation, however, leads to the formation of acyclic adducts that are observable by NMR, can be easily trapped, and, in some cases, can be
