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Propargylic metal derivatives rearrangement

In 1998 it was revealed that allenylidene-ruthenium complexes, arising simply from propargylic alcohols, were efficient precursors for alkene metathesis [12], This discovery first initiated a renaissance in allenylidene metal complexes as possible alkene metathesis precursors, then it was observed and demonstrated that allenylidene-ruthenium complexes rearranged into indenylidene-ruthenium intermediates that are actually the real catalyst precursors. The synthesis of indenylidene-metal complexes and their efficient use in alkene metathesis are now under development. The interest in finding a convenient source of easy to make alkene metathesis initiators is currently leading to investigation of other routes to initiators from propargylic derivatives. [Pg.252]

In parallel, since the first preparation of allenylidene-metal complexes in 1976, the formation of these carbon-rich complexes developed rapidly after the discovery, in 1982, that allenylidene-metal intermediates could be easily formed directly from terminal propargylic alcohols via vinylidene-metal intermediates. This decisive step has led to regioselective catalytic transformations of propargylic derivatives via carbon(l)-atom bond formation or alternately to propargylation. Due to their rearrangement into indenylidene complexes, metal-allenylidene complexes were also found to be catalyst precursors for olefin and enyne metathesis. [Pg.354]


See other pages where Propargylic metal derivatives rearrangement is mentioned: [Pg.424]    [Pg.289]    [Pg.882]    [Pg.335]    [Pg.668]    [Pg.377]    [Pg.208]    [Pg.486]    [Pg.150]    [Pg.75]    [Pg.78]    [Pg.322]    [Pg.208]    [Pg.413]    [Pg.181]    [Pg.381]    [Pg.150]    [Pg.339]    [Pg.207]    [Pg.623]   
See also in sourсe #XX -- [ Pg.371 , Pg.372 , Pg.373 , Pg.374 ]




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1.1- propargyl metals

1.2- metallate rearrangement

Metallic derivates

Propargyl rearrangement

Propargylic derivatives

Propargylic metal derivatives

Propargylic metalation

Propargylic rearrangement

Rearrangement derivatives

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