Alkyne Carboaminationwith Imines Catalyzed by [py<sub>2</sub>TiCl<sub>2</sub>N(<i>p</i>‑tol)]<sub>2</sub>

α,β-Unsaturated imines are valuable functional groups that lack a general, reliable synthetic route. Here, we report that simple Ti imido halide precatalysts of the type [py<sub>2</sub>TiCl<sub>2</sub>N(Ar)]<sub>2</sub> can catalyze alkyne carboamination with imines, yielding highly substituted α,β-unsaturated imines. [py<sub>2</sub>TiCl<sub>2</sub>N(Ar)]<sub>2</sub> complexes can catalyze an expanded scope of substrates relative to earlier-reported cationic Ti complexes, albeit with modest yields. Several key side products of carboamination have been identified, indicating that low-valent Ti species resulting from catalyst decomposition may be limiting productive catalysis.

Publication Details

Journal
Figshare
Published
2025-01-28
DOI
https://doi.org/10.1021/acs.organomet.4c00499.s001
Primary Topic
Mycorrhizal Fungi and Plant Interactions
Type
article
Field-Weighted Citation Impact
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article

Alkyne Carboaminationwith Imines Catalyzed by [py2TiCl2N(p‑tol)]2

Figshare
Mycorrhizal Fungi and Plant Interactions
article

Alkyne Carboaminationwith Imines Catalyzed by [py2TiCl2N(p‑tol)]2

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Abstract

α,β-Unsaturated imines are valuable functional groups that lack a general, reliable synthetic route. Here, we report that simple Ti imido halide precatalysts of the type [py<sub>2</sub>TiCl<sub>2</sub>N(Ar)]<sub>2</sub> can catalyze alkyne carboamination with imines, yielding highly substituted α,β-unsaturated imines. [py<sub>2</sub>TiCl<sub>2</sub>N(Ar)]<sub>2</sub> complexes can catalyze an expanded scope of substrates relative to earlier-reported cationic Ti complexes, albeit with modest yields. Several key side products of carboamination have been identified, indicating that low-valent Ti species resulting from catalyst decomposition may be limiting productive catalysis.

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Mycorrhizal Fungi and Plant Interactions
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Alkyne Carboaminationwith Imines Catalyzed by [py<sub>2</sub>TiCl<sub>2</sub>N(<i>p</i>‑tol)]<sub>2</sub> · Figshare (2025) | TGRS Research Map | TGRS