Phosphonium salts, phenylselenomethyl

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... 

---