Focal Interest
Focal Interest
AI Summary of Peer-Reviewed Research

This page presents an AI-generated summary of a published research paper. The original authors did not write or review this article. [See full disclosure ↓]

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Electron-withdrawing groups enable thio-Belluš–Claisen rearrangement with difluoroketene

A chemistry laboratory workspace featuring a large red-filled Erlenmeyer flask in the foreground, alongside clear glass beakers, a separatory funnel suspended on a stand, and laboratory glassware arranged on a white surface against a dark background.
Research area:ChemistrySulfur-Based Synthesis TechniquesFluorine in Organic Chemistry

What the study found

The study reports a thio-Belluš–Claisen rearrangement using difluoroketene. It found that allyl thioethers can capture the unstable difluoroketene efficiently when the ketene is released in a controlled manner.

Why the authors say this matters

The authors say the new protocol enables controlled release of difluoroketene and its efficient capture for the rearrangement. The findings indicate that an electron-withdrawing group on the internal alkene site is vital because it promotes the rearrangement through charge stabilization in the transition state.

What the researchers tested

The researchers developed a protocol based on fluoride-initiated desilylative β-elimination of difluorobromoacetylsilane. They tested this approach for generating difluoroketene and reacting it with allyl thioethers in a thio-Belluš–Claisen rearrangement.

What worked and what didn't

The protocol was successfully developed for controlled difluoroketene release and its efficient capture by allyl thioether. The abstract states that the presence of an electron-withdrawing group on the internal alkene site was proven to be vital for the reaction; it does not describe unsuccessful variants in detail.

What to keep in mind

The available summary does not provide numerical yields, substrate scope details, or experimental limitations. It also does not list specific failed conditions beyond the statement that the electron-withdrawing group is vital.

Key points

  • The article reports a thio-Belluš–Claisen rearrangement using difluoroketene.
  • Difluoroketene was released by fluoride-initiated desilylative β-elimination of difluorobromoacetylsilane.
  • The protocol allowed efficient capture of the unstable difluoroketene by allyl thioethers.
  • An electron-withdrawing group on the internal alkene site was described as vital for the reaction.
  • The abstract says this effect promotes the rearrangement through charge stabilization in the transition state.

Disclosure

Research title:
Electron-withdrawing groups enable thio-Belluš–Claisen rearrangement with difluoroketene
Publication date:
2026-03-03
DOI:
10.1021/acs.orglett.6c00293
OpenAlex record:
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AI provenance: AI provenance information is not available for this post.

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