147972-99-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 147972-99-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,7,9,7 and 2 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 147972-99:
(8*1)+(7*4)+(6*7)+(5*9)+(4*7)+(3*2)+(2*9)+(1*9)=184
184 % 10 = 4
So 147972-99-4 is a valid CAS Registry Number.
147972-99-4Relevant articles and documents
Synthesis of cyclododeca-2,8-diyne-1,7-dione
Bodenmann,Keese
, p. 1467 - 1470 (1993)
The 12-membered carbocyclic compound 5, containing 2 α,β-unsaturated alkynone functionalities is prepared from 5-hexyn-1-ol in 9 steps. Ring closure is achieved by reductive C-C bond formation between the terminal iodoalkyne and aldehyde group using CrCl