138841-33-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138841-33-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,8,4 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 138841-33:
(8*1)+(7*3)+(6*8)+(5*8)+(4*4)+(3*1)+(2*3)+(1*3)=145
145 % 10 = 5
So 138841-33-5 is a valid CAS Registry Number.
138841-33-5Relevant articles and documents
A general route to spirocycles by radical additions to exocyclic unsaturated sulphides and related compounds
Mellor, John M.,Mohammed, Shahid
, p. 7111 - 7114 (2007/10/02)
Manganic acetate promoted additions of β-dicarbonyl compounds to unsaturated sulphides and enamine derivatives, which are readily available via iodocyclisation of unsaturated substrates, and subsequent elimination, afford spirocyclic systems.
