反应详情

5-(4-(2-(1-ethylcyclopentyloxy)-2-oxoethoxy)-3,5-dimethylphenyl)-5H-dibenzo[b,d]thiophenium bromide (20.0 g, 37.1 mmol) and triethylammonium 1,1-difluoro-2-(methacryloyloxy)ethanesulfonate (1.1 eq, 40.8 mmol, 13.5 g) were dissolved in dichloromethane (250 mL) and water (250 mL) and stirred at r.t. overnight. The dichloromethane layer was separated and the aqueous phase washed with dichloromethane (3×250 mL). The combined organic layers were washed with water (4×250 mL), concentrated in vacuo and residual water removed via azeotrope with acetonitrile (2×250 mL) to afford the title compound (23.8 g, 93%) as a white solid. 1H NMR (300 MHz, (CD3)2CO) δ: 8.53 (d, J=7.8 Hz, 2H), 8.36 (d, J=7.8 Hz, 2H), 8.04 (t, J=7.5 Hz, 2H), 7.83 (t, J=7.8 Hz, 2H), 7.51 (visual s, 2H), 6.14-6.16 (m, 2H), 5.66-5.69 (m, 2H), 4.75 (dd, J=15.6, 15.6 Hz, 2H), 4.57 (s, 2H), 2.30 (s, 6H), 2.03-2.11 (m, 2H), 2.02 (q, J−7.8 Hz, 2H), 1.93-1.95 (m, 3H), 1.55-1.6 (m, 6H), 0.84 (t, J=7.5 Hz, 3H).

1. customThe dichloromethane layer was separated
2. washthe aqueous phase washed with dichloromethane (3×250 mL)
3. washThe combined organic layers were washed with water (4×250 mL)
4. concentrationconcentrated in vacuo and residual water
5. customremoved via azeotrope with acetonitrile (2×250 mL)