Potassium Hydroxide → HCID 67166457, compound

Participants

Reaction Steps

To a solution of Step 2 intermediate (3.0 g, 15.7 mmol) in ethanol (10 ml) was added 2.0 M potassium hydroxide (4.0 ml) and the mixture was refluxed for 3 h. The mixture was concentrated under reduced pressure and diluted with water. The basic aqueous solution containing the product was washed with diethyl ether (2×25 ml). The aqueous solution was acidified to pH 4.0 with 1N HCl. The solid separated out was filtered and washed with water and dried to give 550 mg of the product as an off-white solid; 1H NMR (δ ppm, CDCl3, 300 MHz): 7.01 (t, J=9.0, 1H); 6.57 (d, J=9.0, 1H); 6.36 (d, J=9.0, 1H); 5.94-5.79 (m, 1H); 5.02-4.90 (m, 2H); 3.46 (d, J=6.0, 2H).

Provenance & Evidence