74156-45-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74156-45-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,1,5 and 6 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 74156-45:
(7*7)+(6*4)+(5*1)+(4*5)+(3*6)+(2*4)+(1*5)=129
129 % 10 = 9
So 74156-45-9 is a valid CAS Registry Number.
74156-45-9Relevant articles and documents
A CONVENIENT SYNTHESIS OF 8-OXOPROTOBERBERINE DERIVATIVES
Ruchirawat, Somsak,Lertwanawatana, Werawat,Thepchumrune, Pongtip
, p. 189 - 192 (2007/10/02)
The annulation of isoquinoline derivatives to form the 8-oxoprotoberberine derivatives is described.The key step of the reaction involves intramolecular alkylation of the Reissert compounds.
