In a convenient one-pot sequence, treatment of imines with Lawesson’s reagent (LR) followed by hydrolytic work-up leads to β,β′-diketophosphine sulfides in good to excellent yields. These compounds were isolated exclusively in their tautomeric β-keto-β′-enol form as was evident from IR and NMR spectroscopic data.
在方便的一锅法操作中,用Lawesson试剂(LR)处理
亚胺,然后进行
水解后处理,可产生良好产率的β,β'-二酮膦膦
硫化物。从IR和NMR光谱数据可以明显看出,这些化合物仅以互变异构体β-酮-β'-烯醇的形式分离。