Chai TJ, Chiou XS, Lin NX, Kuo YT, Lin CK.
In situ generation of acyloxyphosphoniums for mild and efficient synthesis of thioesters.
Org Biomol Chem 2023;
21:7541-7545. [PMID:
37676265 DOI:
10.1039/d3ob01318a]
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Abstract
We present a novel approach for in situ generation of acyloxyphosphoniums by premixing iodobenzene dicarboxylates and triphenylphosphine, resulting in efficient thioester synthesis (up to 100% yield). Stable solid iodobenzene dicarboxylates, achieved via carboxylate exchange, serve as hypervalent iodine precursors. The resulting acyloxyphosphoniums allow convenient one-pot thioester synthesis under mild conditions. Our method demonstrates facile acyloxyphosphonium production from iodobenzene dicarboxylates and Ph3P, enabling diverse thioester preparation. ESI-MS analysis confirms acyloxyphosphonium ion formation, pivotal in acylation. This strategy holds potential for combinatorial thioester synthesis and broader nucleophile modification applications.
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