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Photochemical Rearrangements in β,γ-Unsaturated Enones: The Oxa-di-π-methane Rearrangement

✍ Scribed by Vishwakarma Singh

Publisher
John Wiley and Sons
Year
2004
Weight
50 KB
Volume
35
Category
Article
ISSN
0931-7597

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## Abstract The irradiation of 17β‐acetoxy‐4‐oxa‐1,5‐androstadien‐3‐one (**12**) yielded the two stereoisomeric spiro‐lactones **13** and **14**, which result from a di‐π‐methane photorearrangement. A third product, the oxa‐anthrasteroid **15**, was also isolated (__Scheme 3__).