The preparation of some p-(ω′-dimethylaminoalkyl)- and p-(ω′-dimethylaminoalkoxy)-2-oximinoacetophenones and their methiodides is described.No general method was found for synthesis of short-chain (C0, C1, C2) p-(ω′-dimethylaminoalkyl)-2-oximinoacetophenones. The longer-chain compounds (C3, C4) were prepared by a method which would appear to be general. ω-Phenyl-1-haloalkanes undergo Friedel–Crafts acylation to yield p-(ω′-haloalkyl)-acetophenones. These were converted to the dimethylamino compounds, which, subsequently, yielded 2-oximinoacetophenones. No method of preparation of p-(2′-dimethylaminoethyl)-2-oximinoacetophenone was found.Synthesis of p-(ω′-dimethylaminoalkoxy)-2-oximinoacetophenones was accomplished using mixed α,ω-dihaloalkanes and p-hydroxyacetophenone. The p-(ω′-haloalkoxy)-acetophenones from these reactants were first converted to oximes and then to the dimethylamino compounds. Syntheses of p-(ω′-dimethylamino-ethoxy, -propoxy, -butoxy, and -pentoxy)-2-oximinoacetophenones were achieved. That of p-(dimethylaminomethoxy)-2-oximinoacetophenone was unsuccessful.
一些p-(ω′-
二甲氨基烷基)-和p-(ω′-二甲
氨氧基)-2-氧代
肟苯酮及其
碘化物的制备已被描述。没有找到合成短链(C
0, C
1, C
2) p-(ω′-
二甲氨基烷基)-2-氧代
肟苯酮的通用方法。较长链化合物(C
3, C
4)是通过一种看似通用的方法制备的。 ω-苯基-1-卤代
烷烃经过弗里德尔-克拉夫斯酰化反应生成p-(ω′-卤代烷基)-
苯乙酮。这些化合物被转化为二甲
氨基化合物,随后生成2-氧代
肟苯酮。没有找到制备p-(2′-
二甲氨基乙基)-2-氧代
肟苯酮的方法。使用混合的α,ω-二卤代
烷烃和p-羟基
苯乙酮完成了p-(ω′-卤代氧基)-
苯乙酮的合成。从这些反应物中首先将p-(ω′-卤代氧基)-
苯乙酮转化为
肟,然后转化为二甲
氨基化合物。成功合成了p-(ω′-二甲
氨氧乙氧基、-丙氧基、-丁氧基和-戊氧基)-2-氧代
肟苯酮。p-(
二甲氨基甲氧基)-2-氧代
肟苯酮的合成未成功。