photo-Bergman cyclization

{
  "id": "MLC-T-CHM-008806",
  "term": "photo-Bergman cyclization",
  "field": "Chemistry",
  "definition": "A photochemical reaction involving an enediyne derivative that, upon irradiation, undergoes an intramolecular cyclization to form a 1,4-benzenediyl diradical. This highly reactive intermediate can then abstract hydrogen atoms from suitable donors. The reaction is a light-induced variant of the thermal Bergman cyclization and is relevant in the mechanism of certain antitumor antibiotics.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "intramolecular",
    "cyclization",
    "photochemical reaction"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 384 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/photo-bergman-cyclization/"
}