142598-52-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142598-52-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,5,9 and 8 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 142598-52:
(8*1)+(7*4)+(6*2)+(5*5)+(4*9)+(3*8)+(2*5)+(1*2)=145
145 % 10 = 5
So 142598-52-5 is a valid CAS Registry Number.
142598-52-5Relevant academic research and scientific papers
Condensed heterotricycles: Synthesis of pyrazoloquinoline derivatives
Nagarajan, Kuppuswamy,Shah, Rashmi K.
, p. 316 - 321 (2007/10/02)
Pyrazolquinoline 4a is obtained from 4-(2-nitrophenyl)pyrazole-3-carboxylate (3a) by reduction followed by thermal cyclization. 4a undergoes aminoalkylation uniquely at N(3) to form 4b-d, as shown by 13C NMR.Pyrazoles 3a and 3c are methylated at N(
