139061-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139061-21-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,0,6 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 139061-21:
(8*1)+(7*3)+(6*9)+(5*0)+(4*6)+(3*1)+(2*2)+(1*1)=115
115 % 10 = 5
So 139061-21-5 is a valid CAS Registry Number.
139061-21-5Relevant articles and documents
Synthesis Of Oxygen Spirocycles By Manganic Acetate Promoted Additions To Exocyclic Enol Ether Derivatives
Mellor, John M.,Mohammed, Shahid
, p. 7107 - 7110 (1991)
Oxidative addition, promoted by manganic acetate, of β-dicarbonyl compounds to enol lactones and related enol derivatives having an exocyclic double bond affords spirocyclic products, and addition to endocyclic enol ethers gives fused acetals and ketals.
