123331-71-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 123331-71-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,3,3 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 123331-71:
(8*1)+(7*2)+(6*3)+(5*3)+(4*3)+(3*1)+(2*7)+(1*1)=85
85 % 10 = 5
So 123331-71-5 is a valid CAS Registry Number.
123331-71-5Relevant academic research and scientific papers
Synthesis of (+/-)-2-Oxo-seychellene and (+/-)-2-Oxo-4-epi-seychellene
Spitzner, Dietrich,Klein, Iris
, p. 63 - 68 (2007/10/02)
Aprotic Michael additions, which generate the functionalized bicyclooctane 8 from ethyl 2-methyl-2,3-butadienoate (10) and the lithium cyclohexadienolate 9a, are the key steps in the synthesis of 6 (and its 4-epimer). 6 was made from 8 in 10 steps.
