Syntheses, characterizations and structures of ruthenium carbene and allenylidene complexes supported by 1,4,7-trimethyl-1,4,7-triazacyclononane (Me3tacn) ligands

Qian, Bing-Feng; Gao, Yang; Xu, Qian-Ya; Jia, Ai‐Quan; Shi, Hua‐Tian; Zhang, Qian‐Feng

doi:10.1016/j.jorganchem.2022.122429

Journal of Organometallic Chemistry

2022

DOI: 10.1016/j.jorganchem.2022.122429

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Syntheses, characterizations and structures of ruthenium carbene and allenylidene complexes supported by 1,4,7-trimethyl-1,4,7-triazacyclononane (Me3tacn) ligands

Bing-Feng Qian

Yang Gao²,

Qian-Ya Xu³

et al.

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2024

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Synthesis of Mono- and Bis-(allenylidene) Pt(II) Complexes and the Catalytic Application Thereof

Wan,

Zhang,

Wang

et al. 2024

Organometallics

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Seven unchelated bisphosphine-based allenylidene Pt(II) complexes, including three mono(allenylidene) Pt(II) complexes (3a, 3c–d) and four cis-bis(allenylidene) Pt(II) complexes (4a–d), along with four chelated bisphosphine-based bis(allenylidene) Pt(II) complexes (6b–d and 8), have been developed by using alkynyl triazole salt as the allenylidene source, in which a silver transmetalation reaction of mono(allenylidene) Ag(I)Cl complex 2 was involved as the key step. All of these mono- and bis(allenylidene) Pt(II) complexes were fully characterized by NMR spectroscopy and ESI-MS analysis. Moreover, the crystal structures of the unchelated mono(allenylidene) Pt(II) complex 3c, bis(allenylidene) Pt(II) complex 4a, and the chelated bis(allenylidene) Pt(II) complexes 6c and 8 were elucidated, revealing a square-planar coordination geometry in 3c and 4a, whereas a slightly twisted square-planar arrangement was observed in 6c and 8. In comparison to unchelated counterparts 3c and 4a, a stronger coordination of Pt(II) with the chelated bisphosphine groups and a weakened Pt–Cl complexation were observed in complexes 6c and 8. The catalytic prowess of these bisphosphine-bearing mono(allenylidene) Pt(II) complexes was then evaluated in Pt(II)-catalyzed 1,6-enyne cycloisomerization and Pt(II)-mediated bis-indolylation of cyclic vinyl amines/ethers, resulting in the formation of five methylene pyrrolidine derivatives (11a–e), four tri- or tetra-substituted cyclopropane derivatives (12a–d), and four ring-opening products (14a–d).

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Synthesis of Mono- and Bis-(allenylidene) Pt(II) Complexes and the Catalytic Application Thereof

Wan,

Zhang,

Wang

et al. 2024

Organometallics

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show abstract

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Syntheses, characterizations and structures of ruthenium carbene and allenylidene complexes supported by 1,4,7-trimethyl-1,4,7-triazacyclononane (Me3tacn) ligands

Cited by 1 publication

References 39 publications

Synthesis of Mono- and Bis-(allenylidene) Pt(II) Complexes and the Catalytic Application Thereof

Synthesis of Mono- and Bis-(allenylidene) Pt(II) Complexes and the Catalytic Application Thereof

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