Phosphorus oxychloride → HCID 178440023, compound

Participants

Reaction Conditions

Reaction Steps

The compound of formula III (0.51 g, 1 mmol) was added with POCl3 (2 mL), and the mixture was heated for 2 hours at 80° C. The excess phosphorous oxychloride was evaporated of under reduced pressure, and the residue was slowly poured into chopped ice. The solution was adjusted to a pH of 8 with sodium carbonate, and extracted with dichloromethane (40 mL). The organic phase was washed with saturated saline (15 mL), and dried over anhydrous sodium sulfate. Then, 20 mL of ethanol was added therein, and the solution was decolorized by activated carbon, filtrated, and evaporated to remove some of the solvent therefrom. Ethyl acetate was then added therein to perform a recrystallization. Finally, the crystal was separated to obtain 0.32 g of product with a yield of 65%. 1H NMR (CDCl3, 300 MHz) δ: 1.01 (3H, t), 1.04 (3H, t), 1.62 (3H, t), 1.86 (2H, m), 2.42 (2H, q), 2.54 (4H, t), 2.64 (3H, s), 2.99 (2H, t), 3.07 (4H, m), 4.34 (2H, q), 7.15 (1H, d), 7.88 (1H, dd), 8.48 (1H, d), 9.52 (1H, s).

Provenance & Evidence