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Regioselective Synthesis of Tricyclic 1,1-Diphosphines

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journal contribution
posted on 10.12.1996, 00:00 by Maria Zablocka, Nathalie Cénac, Alain Igau, Bruno Donnadieu, Jean-Pierre Majoral, Aleksandra Skowronska, Philippe Meunier
A one-pot regioselective synthesis of tricyclic 1,1-diphosphines involving, first, insertion reaction of 2,3-dihydrophosphole (3) into the zirconium−carbon bond of a generated in situ zirconocene benzyne and, then, an exchange reaction between the resulting tricyclic metalated phosphine 4 and various dichlorophosphines is reported. One of these 1,1-diphosphines, 15a (bis(sulfide) adduct), is characterized by single-crystal X-ray diffraction studies.