Journal of the American Chemical Society

Mechanism of the zirconium-catalyzed carboalumination of alkynes. Evidence for direct carboalumination

T Yoshida, E Negishi

Index: Yoshida, Tadao; Negishi, Ei-ichi Journal of the American Chemical Society, 1981 , vol. 103, # 16 p. 4985 - 4987

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Citation Number: 48

Abstract

Despite all these facts and interpretations, the results presented below provide unequivocal evidence for direct carboalumination, which must be assisted by a Zr-containing species, at least in some typical Zr-catalyzed carboalumination reactions of terminal alkynes. Furthermore the alkyl-halogen exchange, that we previously considered to be an essential step required for carbozirconation with alkylalanes and C12ZrCpz, not only is ...