104487-42-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 104487-42-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,4,8 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 104487-42:
(8*1)+(7*0)+(6*4)+(5*4)+(4*8)+(3*7)+(2*4)+(1*2)=115
115 % 10 = 5
So 104487-42-5 is a valid CAS Registry Number.
104487-42-5Relevant articles and documents
Asymmetric total synthesis of an a-ring precursor to hormonally active 1α,25-dihydroxyvitamin D3
Posner,Kinter
, p. 3967 - 3969 (2007/10/02)
A new sulfinyl orthoester has been designed and used effectively in one-flask syntheses of dienoate esters from allylic alcohols; this new method as well as a highly stereocontrolled [2 + 4]-cycloaddition are applied to synthesis of 1α,25-dihydroxyvitamin D3.