128403-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128403-18-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,4,0 and 3 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 128403-18:
(8*1)+(7*2)+(6*8)+(5*4)+(4*0)+(3*3)+(2*1)+(1*8)=109
109 % 10 = 9
So 128403-18-9 is a valid CAS Registry Number.
128403-18-9Relevant academic research and scientific papers
N-ACYLIMINIUM CYCLIZATIONS: FORMATION OF THE FUROPYRROLIZINE RING SYSTEM
Ent, Hugo,Koning, Henk de,Speckamp, Nico W.
, p. 501 - 505 (2007/10/02)
The hydroxylactams 5a,b could be converted into the furopyrrolizine derivatives 10a,b via the 2-aza-Cope rearrangement cyclization reaction of N-acyliminium ions.
