Synthesis, Characterization and Reactivity of a Base-Stabilized Dialane(4) Supported by Double Layer Nitrogen–Phosphorus Ligands

Pengfei Chen; Yafei Li; Qianyi Zhao; Congqing Zhu; Qin Zhu

doi:10.1002/cjoc.202401017

Chinese Journal of Chemistry ›› 2025, Vol. 43 ›› Issue (6) : 627 -632. DOI: 10.1002/cjoc.202401017

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Synthesis, Characterization and Reactivity of a Base-Stabilized Dialane(4) Supported by Double Layer Nitrogen–Phosphorus Ligands

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Abstract

We synthesized a dialane(4) compound ( 2) stabilized by double-layer N-P ligands. Upon reduction with KC ₈, compound 2 demonstrates solvent-dependent reactivity: in THF, it undergoes C—O bond cleavage to yield product [MeN(CH ₂CH ₂NPiPr ₂) ₂Al(CH ₂) ₄O] ₂K ₂; whereas in a THF/toluene mixture, it results in the activation of the methyl C—H bond in toluene, forming product [MeN(CH ₂CH ₂NPiPr ₂) ₂AlH] ₂K ₂. We propose that these reactions involve an “Al(I)” intermediate, which facilitates oxidative addition with either the C—O bond of THF or the C—H bond of toluene.

Keywords

Dialane / Aluminyl anion / Nitrogen–phosphorus ligand / C—H activation / C—O activation / N, P ligands / Aluminum / Anions

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Pengfei Chen, Yafei Li, Qianyi Zhao, Congqing Zhu, Qin Zhu. Synthesis, Characterization and Reactivity of a Base-Stabilized Dialane(4) Supported by Double Layer Nitrogen–Phosphorus Ligands. Chinese Journal of Chemistry, 2025, 43(6): 627-632 DOI:10.1002/cjoc.202401017