80873-84-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 80873-84-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,8,7 and 3 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 80873-84:
(7*8)+(6*0)+(5*8)+(4*7)+(3*3)+(2*8)+(1*4)=153
153 % 10 = 3
So 80873-84-3 is a valid CAS Registry Number.
80873-84-3Relevant articles and documents
DIASTEREOSELEKTIVE SYNTHESE DES SESQUITERPENS (+/-)-OPLOPANON DURCH KATIONISCHE ?-CYCLISIERUNG
Koester, Frank-Hinrich,Wolf, Herbert
, p. 3937 - 3940 (1981)
Enone 3, obtained by regioselective alkylation of 4 with 5, was cyclized stereoselectively to the enol acetate 9, subsequently transformed to (+/-)-oplopanone (1) by a short reaction sequence.
