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Oxazolone is a chemical compound and functional group, with the molecular formula C3H3NO2. It was named in-line with the Hantzsch–Widman nomenclature and is part of a large family of oxazole based compounds. There are a total of 5 structural isomers of oxazolone; 3 according to the location of the carbonyl group and 2 more according to the location of the double bound C=X (with X= N or C): *2-(3''H'')oxazolone. *2-(5''H'')oxazolone. *4-(5''H'')-oxazolone. *5-(2''H'')-oxazolone. *5-(4''H'')-oxazolone. The 4-oxazolone motif, which is also formally a lactam, is present in a number of drugs (fenozolone, thozalinone, cyclazodone, reclazepam etc). Substituded 5-oxazolones may also be regarded as the cyclization products of N-acyl α-amino acids, making them lactones, and are sometimes referred to as azlactones. ==See also== * Oxazole * Oxazolidone - the saturated analogue 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「oxazolone」の詳細全文を読む スポンサード リンク
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