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Expanded substrate scope with respect to the meso-oxanorbornadiene
Conditions: Polyol 15a (0.2 mmol), 16aa–ah (0.4 mmol), Rh(cod)2OTf (5 mol%), (R,S)-PPF-PtBu2 (6 mol%), organoboron catalyst 26 (30 mol%), in THF (2 ml), argon, 50 °C, 24 h. r.r. and d.r. were determined by analysis of the crude 1H NMR spectra. TBS, tert-butyldimethylsilyl.
