221171-90-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221171-90-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,7 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221171-90:
(8*2)+(7*2)+(6*1)+(5*1)+(4*7)+(3*1)+(2*9)+(1*0)=90
90 % 10 = 0
So 221171-90-0 is a valid CAS Registry Number.
221171-90-0Relevant articles and documents
Synthesis of 2-halo-2H-azirines
Pinho E Melo, Teresa M.V.D,Lopes, Cláudia S.J,Cardoso, Ana L,Rocha Gonsalves, Anto?nio M.D'A
, p. 6203 - 6208 (2007/10/03)
α-Oxophosphonium ylides react with N-chlorosuccinimide, N-bromosuccinimide and N-iodosuccinimide in the presence of azidotrimethylsilane giving the corresponding haloazidoalkenes which were completely converted to the 2-halo-2H-azirines on heating in heptane.
