RETRACTED: A Broadly Applicable Strategy to Aminate Azines Enabled by Electronically Tuned Phosphine Reagents.

08 August 2024, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

We describe a strategy for aminating pyridines and other azines via phosphonium salt intermediates. Precisely tuning the electronic properties of the phosphonium ion was key for C–N bond formation via an SNAr-halogenation, SNAr-amination sequence. The process accommodates a wide range of amine classes and pyridine coupling partners and is viable for applications such as late-stage amination of complex pharmaceuticals and fragment-fragment coupling reactions. The capacity to rapidly modify the structure of the phosphine reagent was decisive and is a valuable feature in pseudohalide design.

Keywords

Pyridines
Amination
Phosphonium salts
Late-stage functionalization
SNAr reaction

Supplementary materials

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Description
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Supporting Information
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Methods, compound characterization and spectral data
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