A product C11H14N2O4 obtained in the reaction of ethyl acetoacetate and hydroxylamine has been identified as (II), and evidence is presented that it was formed through 4-isopropylidene-3-methylisoxazol-5-one (III). A Michael reaction of 4-benzylidene-3-methylisoxazol-5-one (VII) is also recorded.
                                    在
乙酰乙酸乙酯和
羟胺的反应中获得的产物C 11 H 14 N 2 O 4被鉴定为(II),并且证据表明它是由4-异亚丙基-
3-甲基异恶唑-5-酮(III)形成的。 。还记录了4-亚苄基-
3-甲基异恶唑-5-酮(VII)的迈克尔反应。