Design, Synthesis, and Application of Phosphaalkenes to Unique Palladium and Gold Catalysts

Shigekazu Ito Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai, Japan

Matthias Freytag Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai, Japan

Hongze Liang Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai, Japan

Katsunori Nishide Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai, Japan

Masaaki Yoshifuji Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai, Japan; Department of Chemistry, The University of Alabama, Tuscaloosa, AL, USA

Abstract

A 2-silyl-1,3-diphosphapropene was utilized as an asymmetrical P2 ligand of stable palladium(II) catalysts. Several phosphaalkene ligands were utilized for synthesis of novel gold(I) complexes which exhibited unique catalytic activity in 1,6-enyne cycloisomerization, indicating effects of P = C double bond, Au–Au contact, and sulfanyl group.

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Acknowledgments

We thank Mr. Sou Hashino, Tohoku University, for conducting the reaction of 6 to 8 in the presence of 4 and Prof. Noboru Morita for his helpful comments and suggestions.

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Design, Synthesis, and Application of Phosphaalkenes to Unique Palladium and Gold Catalysts

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Design, Synthesis, and Application of Phosphaalkenes to Unique Palladium and Gold Catalysts

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