“…Following the procedure as for the synthesis of 36, the title compound was obtained as a white solid (30%); mp ) 69 °C; R f 0.56 (50:50 ethyl acetate:hexane); δ H (500 MHz, CDCl 3 ) 9.80 (1H, bs), 9.68 (1H, s), 4.16 (2H, q, J 7.1), 2.76 (2H, t, J 7.3), 2.61 (3H, s), 2.60 (3H, s), 2.32 (2H, t, J 7.5), 1.74-1.64 (4H, m), 1.39-1.31 (8H, m), 1.29 (3H, t, J 7.1); δ C (125 MHz, CDCl 3 ) 197.8, 177.5, 173.9, 142.0, 133.6, 128.2, 123.7, 60.2, 42.9, 34. (43). Purged KOH (4 M, 4 mL, 16.00 mmol) was added dropwise to a purged solution of 4-methoxy-3-pyrrolin-2-one (1.36 g, 12.00 mmol) in THF (80 mL), and the reaction mixture was stirred at 60 °C for 1 h under N 2 , after which 36 (2.01 g, 8.00 mmol) was added.…”