## Abstract The BF~3~ · Et~2~O‐ and the CH~3~SO~3~H‐catalysed rearrangements of 10 α‐vinylcyclobutanones have been examined. With little acid, the β,β‐dialkyl derivatives **1** were transformed into linear dienones **2** and **3**; with more acid, they were converted into cyclopentenones **4** by _
Acid catalysed rearrangements of some 5α-acertoxy steroids
✍ Scribed by J.M. Coxon; M.P. Hartshorn; G.A. Lane; K.E. Richards; U.M. Senanayake
- Book ID
- 119481034
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- English
- Weight
- 320 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0039-128X
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📜 SIMILAR VOLUMES
The Westphalen rearrangement' of 38,68-substituted-cholestan-5u-ols (1) to give 5g-methyl-A'-compounds (2) has received considerable study2. No rearrangement products are obtained from 5J3-hydroxy-3, 6a-substituted-4, 6f3-methyl-5 or 6-keto-derivatives 6 . Recently Davies and Summers' reported t
Ihe boron triflucride catalysed rearrangements of steroidal epcxides have been widely reported (1). Recently, considerable interest has been shown in the backbone rearrangement of 4,5-and 5,6-epoxy-steroids (1). In an attempt to elucidate the mechanism of these rearrangements in more detail, we have
Acid-catalyzed reaction of the steroidal A~-unsaturated 313,513-epoxyimino compound 2 and A3-unsaturated 113,513epoxyimino products 3 and 7, results in intramolecular rearrangement involving the N-CH 3 group to give the corresponding perhydro-3,1-oxazine derivatives 9-11. Under similar reaction cond