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2005
Other natural products
U 0800
Aerobic Oxidative Dimerization of 1-Naphthols to 2,2'-Binaphthoquinones Mediated by SnCl4 and Its Application to Natural Product Synthesis. — The type of
03- 205 products
obtained by treatment of 1-naphthols with catalytic amounts of SnCl4 in the
presence of dioxygen strongly depends on the substituents at the naphthols and the reaction time at room temperature. By facile biomimetic syntheses, 2,2'-binaphthoquinones (II) are converted into 3,3'-bijuglone and 3,3'-biplumbagin (IVa) and (IVb), and binaphthol (VIIIb) into elliptinone (X). — (TAKEYA*, T.; DOI, H.; OGATA, T.;
OKAMOTO, I.; KOTANI, E.; Tetrahedron 60 (2004) 41, 9049-9060; Showa Pharm.
Univ., Machida, Tokyo 194, Japan; Eng.) — Klein
2005
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