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Tandem Reactions to Construct Heterocycles via Phosphine-Catalyzed Umpolung Addition and Intramolecular Conjugate Addition.

✍ Scribed by Cheng Lu; Xiyan Lu

Book ID
101944396
Publisher
John Wiley and Sons
Year
2003
Weight
197 KB
Volume
34
Category
Article
ISSN
0931-7597

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Palladium(II)-catalyzed coupling of allenoic acids and Ξ±,Ξ²-unsaturated carbonyl compounds through tandem intramolecular oxypalladation and conjugate addition reactions
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A regioselective divalent palladium-catalyzed tandem coupling reaction of allenoic acids with a,b-unsaturated carbonyl compounds was developed. The reaction involves intramolecular oxypalladation of an allene, followed by insertion of the a,b-unsaturated carbonyl compound and protonolysis of the C P