... Chem., Vol. ... The organic layer was washed with 2 N HCl and saturated aqueous NaHC03 and then evaporated. ... concentrated to give the hydroxyimino derivative 7 (4.85 g, 94%) as a colorless syrup: [aIz2D +61.7' (c 1, CHCI,); 'H NMR (CDCl,, 300 MHz) 6 2.29 (1 H, dd, J 1.5,15.2 ...