54993-52-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 54993-52-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,9,9 and 3 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 54993-52:
(7*5)+(6*4)+(5*9)+(4*9)+(3*3)+(2*5)+(1*2)=161
161 % 10 = 1
So 54993-52-1 is a valid CAS Registry Number.
54993-52-1Relevant articles and documents
A facile route to N-fused pyrrole lactams
Yang, Zhi,Fu, Decai,Shao, Ruimin,Zhang, Shoufang
, p. 790 - 791 (2007/10/03)
N-Fused pyrrole lactams (1a-d) were prepared by substitution and cyclization of methyl 1-(2-bromoethane)pyrrole carboxylate in one-pot. The latter was obtained by treatment of methyl pyrrole-2-carboxylate with excess 1,2-dibromoethane containing NaOH in the presences of PTC.
