Synthesis of (Diethoxyphosphoryl)acetonitrile Oxide and Its Cycloaddition to Olefins. Synthetic Applications to 3,5-Disubstituted 2-Isoxazolines
作者:Otohiko Tsuge、Shuji Kanemasa、Hiroyuki Suga、Norihiko Nakagawa
DOI:10.1246/bcsj.60.2463
日期:1987.7
condensation with carbonyl compounds, alkylation, and oxidation with oxygen to provide 3,5-disubstituted 2-isoxazolines as useful synthetic building blocks. Raney nickel hydrogenolysis of 3-[(diethoxyphosphoryl)methyl]-2-isoxazolines gives β-hydroxy-β′-phosphoryl ketones bearing a variety of functional groups, which can be further converted into α,β-unsaturated β′-phosphoryl ketones.
(二乙氧基磷酰基)乙腈氧化物与烯烃发生区域选择性环加成反应,生成 3-[(二乙氧基磷酰基)甲基]-2-异恶唑啉或 -异恶唑。通过环加合物去质子化产生的磷稳定碳负离子可用于与羰基化合物缩合、烷基化和与氧氧化,以提供 3,5-二取代的 2-异恶唑啉作为有用的合成结构单元。3-[(二乙氧基磷酰基)甲基]-2-异恶唑啉的雷尼镍氢解得到带有多种官能团的β-羟基-β'-磷酰基酮,可进一步转化为α,β-不饱和β'-磷酰基酮。