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    ICAR: endoscopic skull‐base surgery

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    Synthesis of the diaryl ether cores common to chrysophaentins A, E, and F

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    The synthesis of the diaryl ether subunits of the marine natural products chrysophaentin A, E and F is described. These natural prodcuts feature tetrasubstituted benzene rings with complex substitution patterns. The central strategy involves an S(N)Ar reaction between a complex phenol and a polysubstituted fluoronitrobenzene. Subseqent attempts to construct the unusual E-chloroalkene linkage through several different approaches are also disclosed
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