𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Photochemical reactivity of α,β-unsaturated δ-lactams: Synthesis of seco-steroids. Photochemical reactions. XIII [1]

✍ Scribed by Antonio Cánovas; Jesús Fonrodona; Juan-Julio Bonet; Marie Claire Briansó; José Luis Briansó

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

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The UV. irradiation of 17 β‐hydroxy‐2‐aza‐4‐androsten‐3‐one (1), N‐methyl‐17 β‐hydroxy‐2‐aza‐4‐androsten‐3‐one (3), 17 β‐hydroxy‐4‐aza‐5 β‐androst‐1‐en‐3‐one (2) and N‐methyl‐17 β‐hydroxy‐4‐aza‐5 β‐androst‐1‐en‐3‐one (4), gives rise to 1,10‐seco (from 1 and 3) and 5, 10‐seco (from 2 and 4) steroids.

📜 SIMILAR VOLUMES

Photochemical Rearrangement of a Steroid
Photochemical Rearrangement of a Steroidal α,β-Epoxylactone. Photochemical reactions, XI [1]
✍ María Jesús Caus; Antonio Cánovas; Juan-Julio Bonet 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 German ⚖ 284 KB 👁 1 views

## Abstract The UV. irradiation of 17β‐acetoxy‐4α, 5α‐epoxy‐2‐oxaandrostan‐3‐one (**7**) yields 17β‐acetoxy‐2‐oxa‐10(5 → 4)__abeo__‐4ζ (H)‐androsta‐3,5‐dione (**11**). A non‐photochemical synthesis of **11**, proceeding in lower yield, is also described.

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 👁 1 views

## 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
A Di-π-Methane Rearrangement in the Photolysis of a 4-Oxa-steroidal α,β-Unsaturated Enol-lactone. Photochemical reactions VIII
✍ José Alberto Vallet; José Boix; Juan-Julio Bonet; Marie Claire Briansó; Carlos M 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 German ⚖ 364 KB 👁 1 views

## 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__).

Photochemical Reactions. Part 58 [1]. On
Photochemical Reactions. Part 58 [1]. On the mechanism of the rearrangement of the triplet-excited α, β-unsaturated δ-diketone 3, 7-dioxo-4, 4-dimethyl-17 β-acetoxy-Δ5-androstene
✍ S. Domb; K. Schaffner 📂 Article 📅 1970 🏛 John Wiley and Sons 🌐 German ⚖ 461 KB 👁 1 views

## Abstract In einer vorangehenden Arbeit [2] wurde gezeigt, dass sich das triplettangeregte α, β‐ungesättigte δ‐Diketon **1** in die beiden stereoisomeren Cyclopropyl‐diketone **2** und **3** umlagert. Neue Resultate vermitteln nun einen näheren Einblick in die mechanistischen Aspekte dieser Photo