89114-08-9Relevant academic research and scientific papers
Pyridinium N-ylides and (arylmethylene)azol-5-ones. Reaction cascade leading to an unusual spiroisoxazolinone ring
Risitano, Francesco,Grassi, Giovanni,Foti, Francesco,Bilardo, Cristina
, p. 9669 - 9674 (2000)
The reaction of a series of (arylmethylene)azol-5-ones with phenacylpyridinium salt 3 in glacial acetic acid/ammonium acetate mixture gives different results depending on the starting azolone. The isoxazol-5-ones 1 give the unusual spirans 6 in a reaction cascade involving Michael- and retro-Michael reactions, C-alkylation, aldol addition, and diastereospecific cyclization. The reaction performed with oxazol-5-ones 11 has shown that a literature report has to be corrected since no oxazolopyridines 12 but rather arylideneimidazol-5-ones 13 are produced. In the case of pyrazolin-5-ones 14, the unavoidable formation of bis-adducts 15 always prevents any other type of reaction. (C) 2000 Elsevier Science Ltd.
3-Aryl-4-(2,6-dimethylbenzylidene)isoxazol-5(4H)-ones as Fungicides
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Page/Page column 23, (2012/03/27)
The invention relates to 3-aryl-4-(2,6-dimethylbenzylidene)isoxazol-5(4H)-ones, to agrochemically active salts thereof, to the use thereof and to methods and compositions for controlling phytopathogenic harmful fungi and insects in and/or on plants or in
