a Terminal olefin (1.0 equiv.), maleimide (1.0 equiv.), 2,6Me2BQ (1.0 equiv.), p-NO2BzOH (10mol%), DCE(1M), 45°C, 48h. All isolated yields. b~1.3:1 Diastereomeric ratio of facial selectivity, separated using standard chromatography. Major diastereomer shown.