Journal of the Chemical Society. Chemical communications p. 477 - 478 (1987)
Update date:2022-08-30
Topics:
Negishi, Ei-ichi
Akiyoshi, Kazunari
Takahashi, Tamotsu
Reductive elimination of (tBuC<*>C)2Pd(PPh3)2 to give tBuC<*>CC<*>CBut (4) is strongly inhibited by an excess of LiC<*>CBut through the formation of Li2Pd(C<*>CBut)4, which does not readily decompose to produce (4); these results provide, for the first time, a mechanistic interpretation of the hitherto puzzling inhibitory action of highly electropositive metals, such as Li, in Pd-promoted coupling reactions.
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