176702-20-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 176702-20-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,6,7,0 and 2 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 176702-20:
(8*1)+(7*7)+(6*6)+(5*7)+(4*0)+(3*2)+(2*2)+(1*0)=138
138 % 10 = 8
So 176702-20-8 is a valid CAS Registry Number.
176702-20-8Relevant articles and documents
An efficient use of Oppolzer sultam for diastereospecific synthesis of cis-β-lactams
Srirajan,Puranik, Vedavati G.,Deshmukh,Bhawal, Baburao M.
, p. 5579 - 5584 (1996)
Diastereospecific synthesis of cis-β-Lactams (6a-g) has been achieved in ketene-imine cycloaddition reaction (Staudinger reaction) by using homochiral ketene precursors 3 and 4 derived from Oppolzer sultam, in very good yields.