“…These are essentially identical with the reported spectral data. [ 39,63 ] A less mobile fraction with R f 0.2‐0.4 gave 8 as a colorless oil (13 mg, 33%); IR (neat): 1664 (CO) cm −1 ; 1 H NMR (270 MHz, CDCl 3 ): δ 3.09 (t, 2H, CH 2 , J = 6.7 Hz), 3.69 (s, 3H, OCH 3 ), 3.83 (s, 3H, OCH 3 ), 4.42 (t, 2H, CH 2 , J = 6.7 Hz), 6.39 (d, 1H, 2′‐H, J = 2.0 Hz), 6.51 (dd, 1H, 6′‐H, J = 8.0, 2.0 Hz), 6.75 (d, 1H, 5′‐H, J = 8.0 Hz), 7.36‐7.42 (m, 3H, 5‐, 6‐, and 7‐H), 7.55 (q, 1H, 2‐H, J = 1.7 Hz), 8.37‐8.42 (m, 1H, 4‐H) ppm; 13 C NMR (100.5 MHz, CDCl 3 ): δ 35.6 (CH 2 ), 49.4 (CH 2 ), 55.7 (OCH 3 ), 55.9 (OCH 3 ), 109.1 (C), 110.2 (CH), 111.5 (CH), 111.7 (CH), 116.9 (q, CF 3 , J = 291.0 Hz), 120.7 (CH), 122.7 (CH), 123.9 (CH), 124.5 (CH), 127.0 (C), 129.4 (C), 136.3 (C), 137.8 (q, CH, J = 5.0 Hz), 148.3 (C), 149.2 (C), 174.7 (q, CO, J = 35.5 Hz) ppm; EI‐MS: m/z 377 (M + , 34.7), 308 (47.2), 226 (8.1), 151 (100), 129 (12.0); HR‐MS calcd for C 20 H 18 NF 3 O 3 377.12385, found 377.12371.…”