Reaction of Alkyl Vinyl Sulfoxides with PH Acidsстатья
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Дата последнего поиска статьи во внешних источниках: 28 мая 2015 г.
Аннотация:Alkyl vinyl sulfoxides add bis(2-phenylalkyl)phosphine oxides in the presence of alkali metal hydroxides (18-25°C) to give bis(2-phenylalkyl)[2-(alkylsulfinyl)ethyl]phosphine oxides in 86-88% yields. At a higher temperature (50°C) under the conditions of basic catalysis (KOH-dioxane, KOH-DMSO) alkyl vinyl sulfoxides act on secondary phosphine oxides predominantly as sources of the CH2=CH group, giving bis(2-phenylalkyl)vinylphosphine oxides (yield 34-37%) along with bis(2-phenylalkyl)[2-(alkylsulfinyl)ethyl]-phosphine oxides. Phosphine and bis(2-phenylalkyl)phosphines are much less reactive toward alkyl vinyl sulfoxides in the presence of bases than secondary phosphine oxides.