Successive Michael Reaction-Sigmatropic Rearrangement of Naphthodiquinone With O-Silylated Ketene Acetals Leading to Synthesis of Cycloshikonin and Structure-Reactivity Relationship for Side Chain of Naphthazarins.

Chemical and Pharmaceutical Bulletin - Japan
doi 10.1248/cpb.41.1549
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Pharmaceutical Society of Japan

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