Fig. 1

Asymmetric Claisen rearrangement of allyl vinyl ethers and representative natural products containing adjacent quaternary stereocenters. a Previous work for the catalytic asymmetric Claisen rearrangement of allyl vinyl ethers. b The structures of natural products hyperolactones A–C and (−)-biyouyanagin A. c Our catalytic asymmetric Claisen rearrangement strategy for stereodivergent construction of adjacent quaternary stereocenters