Phosphonates, phenylselenomethyl metallation

Phenylselenomethyl phosphonates and (phenylseleno)chloromethane have been metallated by NaH and Bu OK, respectively (Scheme 28, a and b Scheme 29). The former organometallics react with carbonyl compounds and dirratly produce vinyl selenides (Scheme 28, a and whereas the second decomposes to phenylselenomethylene which adds stereospecifically to alkenes and leads to phenyl-selenocyclopropanes in reasonably good yields (Scheme 29). 

Bu"Li, which usually performs the Se-Li exchange in selenides, effects the metallation of some functionalized selenides. This is p cularly the case of phenylselenomethyl phosphonates and phosphonium salts (Scheme 28, c). b6.w >p g t),g methyl phenyl selenide (Scheme 13, a... 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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