Water → HCID 59475971, compound

Participants

Reaction Conditions

Reaction Steps

Trifluoromethanesulfonic acid (0.5 g, 0.0033 mol) was added slowly to a stirred solution of Example 4B (104 g, 0.211 mol) and triethylsilane (66.8 g, 0.574 mol) in trifluoroacetic acid (300 mL) cooled to 30° C. in a water-bath. The reaction became refluxed. After 0.5 h, the water bath was replaced by an oil bath. The reaction mixture was heated to reflux for 3 h. After cooling to room temperature, the reaction mixture was allowed to stir for another 1 h. The solid was filtered, washed with hexane (100 mL) and dried under vacuum at 30° C. to get the desired product as a pale gray solid (86.4 g, yield 85%) 1H NMR (CDCl3, 400 MHz): δ 7.2˜87.34 (m, 3H), 7.18˜7.25 (m, 4H), 4.08 (s, 1H), 2.93˜2.98 (m, 1H), 2.13-˜2.17 (m, 1H), 2.00˜2.03 (m, 1H).

Provenance & Evidence