The treatment of F-alkyl ketones with sodium diethyl phosphite in tetrahydrofuran at −10 to 0 °C gave high yields of 1-substituted F-1-alkenyl phosphates, which readily reacted with amidine or hydrazine derivatives at room temperature to afford the corresponding fluorinated pyrimidines or pyrazoles, respectively, in good to excellent yields.
在四氢呋喃中在 -10 至 0 °C 下用二乙基亚磷酸钠处理 F-烷基酮,得到高产率的 1-取代 F-1-烯基磷酸酯,其在室温下容易与脒或肼衍生物反应,得到相应的氟化物。嘧啶类或吡唑类,分别具有良好到极好的产率。
An efficient generation of the aluminum enolates of 1H-perfluoroalkyl ketones from 1-substituted-1-perfluoroalkenyl phosphates and their aldol reaction with aldehydes
A new efficient method for the generation of F-alkyl ketone metal enolates by using copper(II) bromide-lithium aluminium hydride reagent and their aldol reaction with carbonyl compounds
1-Substituted -1-alkenyl phosphates, readily prepared from -alkyl ketones and sodium diethyl phosphite, were treated with copper(II) bromide-lithium aluminiumhydridereagent at −30 °C to generate -alkyl ketone aluminium enolates, which underwent the aldol reaction with various aldehydes to give the corresponding α-fluoro-α--alkyl β-hydroxy ketones in fairly good to excellent yields.
Highly effective dephosphorylation of F-1-alkenyl phosphates with copper halide-lithium aluminium hydride reagent: A new access to 1-hydryl-F-alkyl ketones from F-alkyl ketones
作者:Takashi Ishihara、Manabu Kuroboshi
DOI:10.1016/s0022-1139(00)83092-4
日期:1987.10
1-Substituted F-1-alkenyl phosphate, readily available from F-alkyl ketones and diethyl phosphite, undergo the dephosphorylation by the action of copper(I) or copper(II) bromide and lithium aluminium hydride at −78 °C followed by hydrolysis to give the corresponding 1-hydryl-F-alkyl ketones in good to excellent yields.