The (1-phenylsulfonyl-2-pyrazolin-5-yl)-methyl ketones 1a–c and the ethylene hemithioketal of 1b are converted by ethanolic sodium hydroxide into a variety of heterocyclic products such as pyridines, pyrazoles (2a, 2c, and the ethylene hemithioketal of 2f, respectively) and pyridazines (7a, b). The formation of part of these products involves a novel variant of the van Alphen rearrangement and a novel
(1-苯基磺酰基-2-
吡唑啉-5-基)-甲基酮1a–c和1b的亚乙基半
缩酮被
乙醇氢氧化钠转化为各种杂环产物,例如
吡啶,
吡唑(2a,2c和分别为2f的亚乙基半
缩酮和
哒嗪(7a,b)。这些产物的一部分涉及van Alphen重排的新变体和3 H-
吡唑→
哒嗪环扩大反应。酮1a–c的
肟以及
肟醚14在消除它们的侧链和/或苯磺酰基的情况下被转化为芳族
吡唑衍
生物和环转化产物,即。2-
异恶唑啉和
吡啶的衍
生物。将
肟衍
生物的裂解反应与其母体酮的裂解反应进行了比较。