{
  "abstract": "Indigoids, which are derivatives of indigo and indirubin, have been synthetized from indoles in the presence of H₂O₂ and a supramolecular capsule formed from 2,8,14,20-tetra-undecyl-resorcin[4]arene and water, with the latter acting as an organocatalyst. The dimerization reaction of the oxides formed takes place within the confined space provided by the capsule. This one-pot synthesis is carried out under mild conditions, 8 h at 40° C, with a \"green\" oxidant, and requires no metal. The method yielded nine dyes, including indigo, indirubin, and two novel derivatives of these molecules: 6,6′-dibenzyloxyindigo and 6,6′-dibenzyloxyindirubin.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 2,
  "authors": [
    {
      "name": "Maxime Steinmetz"
    },
    {
      "name": "David Sémeril"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2z09k9wbdy18j.bib",
  "cited_by": 1,
  "doi": "10.1016/j.dyepig.2025.113367",
  "fulltext_url": null,
  "id": "2z09k9wbdy18j",
  "issns": [
    "0143-7208"
  ],
  "landing_url": "https://hal.science/hal-05805646v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.chim"
    ],
    [
      "hal",
      "1.chim.cata"
    ],
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      "hal",
      "1.chim.orga"
    ],
    [
      "openalex",
      "1605|Synthesis of Indole Derivatives"
    ]
  ],
  "openalex": "W4415623478",
  "pdf_url": "https://hal.science/hal-05805646/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-19",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/2z09k9wbdy18j.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:59Z",
      "native_id": "hal-05805646",
      "source": "hal",
      "url": "https://hal.science/hal-05805646v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "hal:1.chim.cata",
      "subfield": "catalysis"
    },
    {
      "field": "chemistry",
      "origin": "hal:1.chim.orga",
      "subfield": "organic"
    }
  ],
  "title": "One step synthesis of indigoids from indoles in a self-assembled capsule",
  "title_text": "One step synthesis of indigoids from indoles in a self-assembled capsule",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:59Z",
  "url": "https://research.draconitic.com/paper/2z09k9wbdy18j",
  "venue": "Dyes and Pigments",
  "versions": []
}