Dimerization of Cyclopropyl Ketones and Cross Reactions of Cyclopropyl Ketones with Enones as an Entry to Five-Membered Rings.
✍ Scribed by Lei Liu; John Montgomery
- Book ID
- 101994570
- Publisher
- John Wiley and Sons
- Year
- 2006
- Weight
- 34 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0931-7597
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✦ Synopsis
Abstract
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## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
## Abstract Cyclopropyl ketones are readily cleaved under neutral conditions at room temperature by the combined action of acetyl methanesulfonate and nucleophiles such as Br^−^, I^−^, and MsO^−^. The high‐yield reaction involves regiospecific enol acetate formation with a stereoselectivity of nucl
## Abstract Attempts to convert 3β‐acetoxy‐5,19‐__cyclo__‐pregna‐6,20‐dione (8) into a cyclocitrinol‐related steroid with a bicyclo[4.4.1]‐undecane AB‐ring substructure through a Lewis acid‐assisted fragmentation failed. Instead, treating 8 with an excess of Ac~2~O and BF~3~·Et~2~O afforded B‐__hom