173259-97-7Relevant academic research and scientific papers
Method of quantitative determination of peroxide, a peroxidation-active substance or a pyrazolopyridopyridazine derivative
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, (2008/06/13)
Disclosed is a chemiluminescent method of quantitatively determining one of peroxide, a peroxidation-active substance or a pyrazolopyridopyridazine derivative represented by the formula (I): wherein R1represents hydrogen, lower alkyl, optionally substituted aryl, optionally substituted heterocyclic group, substituted sulfonyl, substituted sulfinyl, substituted thio etc.; R2represents hydrogen, lower alkyl, optionally substituted aryl, etc., or a salt thereof;, characterized by subjecting an unknown amount of one substance selected from the peroxide, peroxidation-active substance and pyrazolopyridopyridazine derivative to react with a known amount of the remaining two substances.
Synthesis and chemiluminescence of 1,3-disubstituted pyrazolo[4',3':5,6]pyrido[2,3-d]pyridazine-5,8(6H,7H)-diones and related compounds
Tominaga,Yoshioka,Kataoka,Aoyama,Masunari,Miike
, p. 8641 - 8644 (2007/10/02)
Reactions of 1,3-disubstituted 5-aminopyrazole 5-aminopyrazole-4-carbonitrile derivatives (3a-o) with dimethyl acetylenedicarboxylate in the presence of potassium carbonate in dimethyl sulfoxide gave the corresponding dimethyl 1,3-disubstituted pyrazolo[3,4-b]pyridine-5,6-dicarboxylates (4a-o) which were allowed to react with excess hydrazine hydrate in ethanol under reflux followed by heating at 250-300°C to give 1,3-disubstituted 4-amino-1H-pyrazolo[4',3':5,6]pyrido[2,3-d]pyridazine-5,8(6H,7H)-dione s (7a-s) in good yields. These tricyclic pyridazine derivatives were evaluated for chemiluminescence. Some were found to be more efficient than luminol in light production. 4-Amino-3-methylsulfonyl-1-phenyl-1H-pyrazolo[4',3':5,6]pyrido[2,3-d]p yridazine-5,8(6H,7H)-dione (7r) showed the greatest chemiluminescence intensity derivatives in the presence of H2O2, peroxidase, in a solution of phosphate buffer pH 8.0.
