Annulation

{
  "id": "MLC-T-CHM-000626",
  "term": "Annulation",
  "field": "Chemistry",
  "definition": "A chemical reaction that leads to the formation of a new ring system directly attached to an existing molecule. This process effectively expands the molecular framework by adding a cyclic structure. It is a fundamental transformation in organic chemistry for synthesizing polycyclic compounds, including natural products.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "annelation",
    "cyclization",
    "transformation"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1083 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/annulation/"
}