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A Norrish Type I cleavage in the photolysis of a steroidal α,β-unsaturated δ-lactone. Photochemical Reactions. XIV [1]

✍ Scribed by Antonio Cánovas; Juan-Julio Bonet

Publisher
John Wiley and Sons
Year
1980
Tongue
German
Weight
189 KB
Volume
63
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The UV. irradiation of 17 β‐acetoxy‐4‐oxa‐5 α‐androst‐1‐en‐3‐one (1) yields A,B‐diseco‐steroids originating from a Norrish I process of the lactone function.

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Photochemical reactions VII [1]. A ‘type
Photochemical reactions VII [1]. A ‘type A rearrangement’ in the photolysis of a steroidal α, β-unsaturated lactone
✍ Vicente Ferrer; José Gómez; Juan-Julio Bonet 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 German ⚖ 220 KB

## Abstract The irradiation of 17 β‐hydroxy‐2‐oxa‐androst‐4‐en‐3‐one (**1**) yield a cyclopropane derivative **2**, which is the result of a rearrangement, formally analogous to the ‘type A rearrangement’ of the enones. Two other products, the dihydroxy compound **5** and the dimer **6**, have also

A Di-π-Methane Rearrangement in the Phot
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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__).