87929-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 87929-21-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,9,2 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 87929-21:
(7*8)+(6*7)+(5*9)+(4*2)+(3*9)+(2*2)+(1*1)=183
183 % 10 = 3
So 87929-21-3 is a valid CAS Registry Number.
87929-21-3Relevant articles and documents
Novel Synthesis of Pyrazole and Pyrazoline Derivatives
Matsumura, Noboru,Kunugihara, Akira,Yoneda, Shigeo
, p. 1169 - 1172 (2007/10/02)
The 1,4-dianion of acetophenone N-ethoxycarbonylhydrazone reacts with carbonyl compounds such as esters, acyl chlorides, amides and α-haloketones such as phenacyl chloride, 1-chloroacetone, 1,3-dichloroacetone, to produce pyrazole and pyrazoline derivativ
