Reactivity of (THF)4Ca(PPh2)2 in stoichiometric and catalytic reactions

Al-Shboul, Tareq GND

Catalytic intermolecular hydrophosphanylation of alkynes and conjugated diynes with HPPh2 was achieved with the calcium based catalyst (thf)4Ca(PPh2)2 with very good yields and under mild conditions. Beside the enormous reactivity of (thf)4Ca(PPh2)2 regarding hydrophosphanylation reactions, the diphenylphosphanide ligand is also able to act as Lewis base. In fact, reactions of (thf)4Ca(PPh2)2 with iron carbonyl complexes afforded [(thf)4Ca{Fe2(CO)6(µ-CO)(µ-PPh2)}2]. Reaction with elemental chalcogenides led to the formation of the respective diphenylphosphinates (thf)3Ca(S2PPh2)2, (thf)3Sr(S2PPh2)2, (thf)2Ca(Se2PPh2)2 and (thf)3Sr(Se2PPh2)2. All of these compounds are colorless, crystalline solids, which are stable under atmospheric conditions.

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Al-Shboul, Tareq: Reactivity of (THF)4Ca(PPh2)2 in stoichiometric and catalytic reactions. 2010.

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