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Spiroannulation by the [2,3]sigmatropic rearrangement via the cyclic allylsulfonium ylide. A stereoselective synthesis of (+)-acorenone B

✍ Scribed by Kido, Fusao; Abiko, Toshiya; Kato, Michiharu


Book ID
121335722
Publisher
Royal Society of Chemistry
Year
1992
Weight
731 KB
Volume
2
Category
Article
ISSN
1472-7781

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New variously substituted 1-dimethylamino or 1-methylthio but-3-enylidene-bis-phosphonates have been prepared from readily available ␣-dimethylamino or ␣-methylthio methylene-bis-phosphonates by postulated [2,3]-Wittig rearrangements of the corresponding N-or S-allylic intermediate ylides.