{
  "abstract": "A dinuclear gold photocatalytic approach for strain-release σ-bond metathesis has been developed by combining inner-sphere electron transfer (ISET) and radical ligand transfer (RLT) mechanisms. This strategy facilitates atom-transfer reactions via C–I bond cleavage, radical translocation, and ligand transfer, yielding a wide range of spirocyclobutyl oxindoles with excellent substrate diversity and atom economy. Additionally, the produced C(sp 3 )–I bond functions as a versatile handle for selective Heck-type coupling with alkenes. Mechanistic investigations indicate a combined ISET-RLT pathway, where sequential excitation and excited-state aurophilic interactions between high-valent gold centers weaken the Au–I bond and enable ligand transfer. Gramscale synthesis and further derivatizations highlight the synthetic utility of this methodology.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "name": "Sourav Pal"
    },
    {
      "name": "Pintu Kumbhakar"
    },
    {
      "name": "Theertha Babu T"
    },
    {
      "name": "Malekul Islam"
    },
    {
      "name": "Suman De Sarkar",
      "orcid": "0000-0002-6342-4711"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/73rk21q4htxh5.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15009073/v1",
  "fulltext_url": null,
  "id": "73rk21q4htxh5",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009073/v1",
  "language": null,
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1605|Radical Photochemical Reactions"
    ]
  ],
  "openalex": "W7213553392",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15009073/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-18",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/73rk21q4htxh5.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:19Z",
      "native_id": "10.26434/chemrxiv.15009073",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009073/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1605|Radical Photochemical Reactions",
      "subfield": "organic"
    }
  ],
  "title": "Dinuclear Gold Photocatalyzed Atom-Transfer σ-Bond Metathesis and Sequential Heck-type Coupling",
  "title_text": "Dinuclear Gold Photocatalyzed Atom-Transfer σ-Bond Metathesis and Sequential Heck-type Coupling",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:19Z",
  "url": "https://research.draconitic.com/paper/73rk21q4htxh5",
  "venue": "ChemRxiv",
  "versions": []
}