Abstract
The hydroxyrhodium(I) complexes 2a,b, which are prepared from the corresponding chloro derivatives 1a,b and KOBut, react with acetic acid and phenol at room temperature to give the new acetato and phenolato metal compounds 3a,b and 4a,b almost quantitatively; subsequent treatment of 3a,b and 4a,b with CO leads to migratory insertion of the allenylidene unit into the Rh–OR bond to yield γ-functionalized alkynyl ligands.
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