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Synfacts 2015; 11(1): 0055
DOI: 10.1055/s-0034-1379752
DOI: 10.1055/s-0034-1379752
Metal-Catalyzed Asymmetric Synthesis and Stereoselective Reactions
Nickel-Catalyzed Asymmetric Claisen Rearrangement
Further Information
Publication History
Publication Date:
15 December 2014 (online)
Significance
The authors present an asymmetric propargyl and allyl Claisen rearrangement using a readily available chiral N,N′-dioxide–nickel(II) complex. Product allyl and allenyl compounds were obtained with good yield and excellent enantio- and diastereoselectivities.
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Comment
This rearrangement works with relatively inexpensive metal (nickel) under mild reaction conditions. The produced β-keto esters with all-carbon quaternary stereogenic centers with allenyl and allyl substituents are highly useful chiral building blocks.
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