... To a solution of the above compounds in CH,OH (5 mL) was added NaOMe (0.1 g, 2.0 mmol) in MeOH (100 mL), and the resulting mixture was stirred at 20 "C for 1 h. EtOAc (10 mL) was added, and the organic phase was washed with HCl (2 N, 10 mL), H20 ... J. Org. Chem., Vol. ...