Selenides, propargylic metallation

Alkylation ofa-thio- and a-seleno-alkyllithiums Alkylation ofa-thio- and a-seleno-benzylmetals Alkylation ofa-thio- and a-seleno-allylmetals Alkylation ofa-thio- and a-seleno-propargylic metal derivatives Alkylation of a-metallovinyl sulfides and selenides... [Pg.85]

Allylic metals, in propargylic alcohol alkylation, 11, 129 ir-Allylic palladium complexes, and carbocyclization, 11, 426 Allylic position, alkenes, dienes, polyenes, metallation, 9, 6 Allylic selenides, [2,3]sigmatropic rearrangement, 9, 481 Allylic substitution reactions for C-N bonds via amination... [Pg.51]

Propargylic sulfides " and selenides have been metallated with n-butyllithium and lithium amide respectively, and allylated or alkylated selectively at the propargylic position (Scheme 34) with primary and secondary alkyl halides. - ... [Pg.104]

Lithiated allylic sulfoxides may be a-alkylated and the resulting products subjected to [2,3]-sigmatropic rearrangement induced by a thiophile to give allylic alcohols (eq 43). In contrast, alkenyl aryl sulfoxides produce a-lithiated species which are alkylated with Mel or PhCHO in good yields (eq 44). LDA has also been used to metalate allylic and propargylic selenides as weU as aryl vinyl selenides. ... [Pg.228]

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