Term: oxa-di-π-methane rearrangement
https://doi.org/10.1351/goldbook.O04359

Definition:
A photochemical reaction of a β,γ-unsaturated ketone to form a saturated α-cyclopropyl ketone. The rearrangement formally amounts to a 1,2-acyl shift and 'bond formation' between the former α and γ carbon atoms. O04359.png

Related Terms:
1) di-π-methane rearrangement (http://doi.org/10.1351/goldbook.D01745).
2) photochemical reaction (http://doi.org/10.1351/goldbook.P04585).
3) rearrangement (http://doi.org/10.1351/goldbook.R05194).

Image: Not defined (https://goldbook.iupac.org/img/inline/O04359.png) 

Source: PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2258 (https://doi.org/10.1351/pac199668122223)

Citation: 'oxa-di-π-methane rearrangement' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.O04359

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