[1,2]- or [2,3]-Rearrangement of Onium Ylides of Allyl and Benzyl Ethers and Sulfides via in situ-Generated Iodonium Ylides.
โ Scribed by Graham K. Murphy; F. G. West
- Publisher
- John Wiley and Sons
- Year
- 2007
- Weight
- 23 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0931-7597
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โฆ Synopsis
Abstract
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๐ SIMILAR VOLUMES
Tandem intramolecular generation and rearrangement of allylic oxonium ylides from a-diazo b-keto esters has been effected with the aid of dirhodium(II) tetrakis[N-phthaloyl-(S)-tert-leucinate] in toluene, providing benzofuran-3-ones via [2,3]-sigmatropic rearrangement in up to 76% ee. In systems wit
In this paper, the authors describe the tandem oxonium ylide formation and [2,3]-sigmatropic rearrangement from 1b using Rh 2 (R-DDBNP) 4 (up to 62% ee).