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PEG‐N 2 O 4 System as an Efficient Reagent both for the Rapid Oxidation of Urazoles and 1,4‐Dihydropyridines under Nonaqueous Conditions
Author(s) -
Zolfigol Mohammad Ali,
Ghaemi Ezat,
Madrakian Elaheh,
Niknam Khodabakhsh
Publication year - 2008
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200800106
Subject(s) - chemistry , reagent , oxidizing agent , aromatization , peg ratio , pyridine , peg 400 , combinatorial chemistry , inorganic chemistry , nuclear chemistry , medicinal chemistry , organic chemistry , polyethylene glycol , catalysis , finance , economics
N 2 O 4 was easily impregnated on polyethyleneglycol to give a stable reagent. Polyethyleneglycol‐N 2 O 4 ( PEG‐N 2 O 4 ) system was used as an effective oxidizing agent for the oxidation of urazoles and bis‐urazoles to their corresponding triazolinediones and also for the aromatization of 1,4‐dihydropyridines into the corresponding pyridine derivatives under mild conditions at room temperature with good to excellent yields.