128989-55-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128989-55-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,8 and 9 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 128989-55:
(8*1)+(7*2)+(6*8)+(5*9)+(4*8)+(3*9)+(2*5)+(1*5)=189
189 % 10 = 9
So 128989-55-9 is a valid CAS Registry Number.
128989-55-9Relevant academic research and scientific papers
N-vinyl and N-unsubstituted β-lactams from 1-substituted 2-aza-1,3-butadienes
Georg,He,Kant,Mudd
, p. 451 - 454 (2007/10/02)
The reaction of acid chlorides and N-vinyl imines results in the stereoselective formation of cis N-vinyl β-lactams. The N-vinyl protecting group can be removed either oxidatively or hydrolytically to yield N-substituted β-lactams.
