Salicylamide → HCID 18760865, compound

Participants

Reaction Steps

To a stirred solution of polyphosphonate ethyl ester (PPE) (3.46 g, 8.0 mmol) in chloroform (10 mL) was added salicylamide (548 mg, 4.0 mmol) followed by addition of a solution of (±)-Methyl 2-ethoxy-3-[4-[(2,2diethoxy)ethoxy]phenyl]propanoate (1.28 g, 4.4 mmol) obtained in preparation 2, in chloroform (10 mL) dropwise at 25-30° C. The reaction mixture was immersed in a preheated oil bath at 70° C. and refluxed 12 h. The reaction mixture was cooled to room temperature and CHCl3 was removed under reduced pressure. The resultant residue was neutralised (pH=7.0) with saturated aqueous NaHCO3 solution and extracted with ethyl acetate (3×20 mL). The combined organic extracts were washed with brine, dried over anhydrous Na2SO4 and concentrated. The crude compound was chromatographed on silica gel using a gradient of 5-25% of ethyl acetate in pet ether as eluent to afford the title compound (1.15 g, 72%) as a pale yellow liquid.

Provenance & Evidence