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Abstract
The interaction of 1-alkynyl phosphine oxides, sulfides, and selenides with Me 3 Al and Et 3 Al under zirconocene catalysis was studied. It has been found that the pathway of the reaction of 1-alkynyl phosphine derivatives with Et 3 Al strongly depends on the nature of the substrate and the solvent. The ethylalumination takes place in the case of 1-alkynyl phosphine oxides in hexane solvent. The reaction of 1-hexynyl phosphine oxide with Et 3 Al failed when dichloromethane was used as a solvent. Zirconium-catalyzed reaction of 1-heptynyl phosphine sulfide with Et 3 Al proceeds as the cycloalumination followed by the desulfurization under the action of low-valent zirconium complexes. 1-Heptynyl phosphine selenide was subjected to full deselenation under the reaction conditions.
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