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Abstract
A route to enable the preparation of 5-benzylidenyl-benzopyridyloxepine analogues was developed to continue our research in the field of nuclear hormone receptor modulators. The key steps are 1) a syn-stereoselective diboration of a tethered aryl alkyne; 2) an intramolecular Suzuki cross-coupling reaction, which forms in a stereo- and regiocontrolled fashion, the 5-exoalkylidenyl 7-membered ring imbedded within the core of the scaffold and; 3) an intermolecular Suzuki to furnish the final tetra-substituted olefinic benzopyridyloxepines.
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