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Lithium-Aluminate-Catalyzed Hydrophosphination Applications.

ABSTRACT: Synthesized, isolated, and characterized by X-ray crystallography and NMR spectroscopic studies, lithium phosphidoaluminate iBu3 AlPPh2 Li(THF)3 has been tested as a catalyst for hydrophosphination of alkynes, alkenes, and carbodiimides. Based on the collective evidence of stoichiometric reactions, NMR monitoring studies, kinetic analysis, and DFT calculations, a mechanism involving deprotonation, alkyne insertion, and protonolysis is proposed for the [iBu3 AlHLi]2 aluminate catalyzed hydrophosphination of alkynes with diphenylphosphine. This study enhances further the development of transition-metal-free, atom-economical homogeneous catalysis using common sustainable main-group metals.

SUBMITTER: Pollard VA

PROVIDER: S-EPMC6771573 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature

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Lithium-Aluminate-Catalyzed Hydrophosphination Applications.

Pollard Victoria A VA Young Allan A McLellan Ross R Kennedy Alan R AR Tuttle Tell T Mulvey Robert E RE

Angewandte Chemie (International ed. in English) 20190725 35

Synthesized, isolated, and characterized by X-ray crystallography and NMR spectroscopic studies, lithium phosphidoaluminate iBu3 AlPPh2 Li(THF)3 has been tested as a catalyst for hydrophosphination of alkynes, alkenes, and carbodiimides. Based on the collective evidence of stoichiometric reactions, NMR monitoring studies, kinetic analysis, and DFT calculations, a mechanism involving deprotonation, alkyne insertion, and protonolysis is proposed for the [iBu3< ...[more]

PMID: 31260154

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