139884-14-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139884-14-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,8,8 and 4 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 139884-14:
(8*1)+(7*3)+(6*9)+(5*8)+(4*8)+(3*4)+(2*1)+(1*4)=173
173 % 10 = 3
So 139884-14-3 is a valid CAS Registry Number.
139884-14-3Relevant articles and documents
Steric Control of Chemoselectivity in the Reaction of Ynamine Esters with Heterodienes
Dell, Colin P.
, p. 699 - 700 (2007/10/02)
Ynamine esters undergo regioselective formal hetero-Diels-Alder reactions with α,β-unsaturated-1,3-dicarbonyl compounds yielding functionalised pyrans.The chemoselectvity of the reaction appears to be governed by steric factors.Key Words: Regioselective;
