Yang photocyclization

{
  "id": "MLC-T-CHM-012773",
  "term": "Yang photocyclization",
  "field": "Chemistry",
  "definition": "A photochemical reaction involving the intramolecular cyclization of a γ-keto aldehyde or ketone to form a cyclobutanol. This process typically proceeds via a Norrish Type II reaction, where a hydrogen atom is abstracted from the γ-carbon by the excited carbonyl oxygen. The resulting 1,4-biradical then undergoes cyclization to form the four-membered ring alcohol.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "abstraction",
    "alcohols",
    "chemical induction",
    "diradicals",
    "intramolecular"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 441 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/yang-photocyclization/"
}