反应详情

Following the procedure described for compound 46, zinc powder (0.957 g, 14.6 mmole), TiCl4 (0.800 mL, 7.30 mmole), (4-bromophenyl)(4-hydroxyphenyl)methanone (2) (0.512 g, 1.85 mmole) and 2,2,6,6-tetramethyltetrahydro-4H-pyran-4-one (52) (0.851 mL, 5.45 mmole), afforded 0.564 g (76%) of 53 as a white foamy solid. 1H NMR (CDCl3): δ 7.41 (d, J=8.3 Hz, 2H), 7.02 (d, J=8.4 Hz, 2H), 7.01 (d, J=8.4 Hz, 2H), 6.76 (d, J=8.3 Hz, 2H), 4.99 (s, 1H), 2.24 (s, 2H), 2.20 (s, 2H), 1.22 (s, 6H), 1.21 (s, 6H).