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Carbonylative Suzuki-Miyaura couplings of sterically hindered aryl halides: Synthesis of 2-aroylbenzoate derivatives

Permanent link
https://hdl.handle.net/10037/18225
DOI
https://doi.org/10.1039/D0OB00044B
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Date
2020-02-10
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Author
Ismael, Aya; Skrydstrup, Troels; Bayer, Annette
Abstract
We have developed a carbonylative approach to the synthesis of diversely substituted 2-aroylbenzoate esters featuring a new protocol for the carbonylative coupling of aryl bromides with boronic acids and a new strategy to favour carbonylative over non-carbonylative reactions. Two different synthetic pathways – (i) the alkoxycarbonylation of 2-bromo benzophenones and (ii) the carbonylative Suzuki–Miyaura coupling of 2-bromobenzoate esters – were evaluated. The latter approach provided a broader substrate tolerance, and thus was the preferred pathway. We observed that 2-substituted aryl bromides were challenging substrates for carbonylative chemistry favouring the non-carbonylative pathway. However, we found that carbonylative Suzuki–Miyaura couplings can be improved by slow addition of the boronic acid, suppressing the unwanted direct Suzuki coupling and, thus increasing the yield of the carbonylative reaction.
Is part of
Ismael, A. (2020). Method development towards synthesis of carbapenemase inhibitors. (Doctoral thesis). https://hdl.handle.net/10037/19594.
Publisher
Royal Society of Chemistry
Citation
Ismael A, Skrydstrup T, Bayer A. Carbonylative Suzuki-Miyaura couplings of sterically hindered aryl halides: Synthesis of 2-aroylbenzoate derivatives. Organic and biomolecular chemistry. 2020
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© The Royal Society of Chemistry 2020

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