Reaction between aryl 1,3-diketoesters 2a-e and hydroxylamine hydrochloride has been investigated under different experimental conditions. Whereas acid conditions gave principally 3,5-isoxazole esters (3a-e), reactions under neutral and basic conditions led to different 4,5 and 2,3-dihydro-hydroxy-isoxazoles 4a-e and 5a-e.
在不同实验条件下,研究了芳基1,3-二
酮酯2a-e与
盐酸羟胺的反应。酸性条件下主要生成3,5-
异噁唑酯(3a-e),而中性和碱性条件下的反应则导致不同的4,5和2,3-二
氢-羟基-
异噁唑(4a-e和5a-e)。