1021955-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1021955-18-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,1,9,5 and 5 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1021955-18:
(9*1)+(8*0)+(7*2)+(6*1)+(5*9)+(4*5)+(3*5)+(2*1)+(1*8)=119
119 % 10 = 9
So 1021955-18-9 is a valid CAS Registry Number.
1021955-18-9Relevant articles and documents
N-Heterocyclic carbene catalysed β-lactam synthesis
Duguet, Nicolas,Campbell, Craig D.,Slawin, Alexandra M. Z.,Smith, Andrew D.
, p. 1108 - 1113 (2008)
N-Heterocyclic carbenes promote the formal [2+2] cycloaddition of ketenes with N-tosyl imines to give the corresponding β-lactams in good to excellent isolated yields; chiral NHCs give β-lactams in high e.e. after crystallisation.
