Trifluoroacetic acid → HCID 17862551, compound

Participants

Reaction Steps

A mixture of 4-methoxybenzyl 2-[[bis(allyloxy)phosphoryl]oxymethyl]-4-cyanobenzoate (949.1 mg, 2.07 mmol) obtained from Example 4-(5) and anisole (1.0 g, 9.2 mmol) was cooled to 0° C., and trifluoroacetic acid (5 ml) was added thereto. The resulting mixture was warmed to room temperature and allowed to stand for 15 minutes, diluted with toluene, and concentrated under reduced pressure to eliminate the volatile components (repeated three times). Hexane was added to the residue, and then the supernatant solution was removed to give crude 2-[[bis(allyloxy)phosphoryl]oxymethyl]-4-cyanobenzoic acid. This crude product was dissolved in dichloromethane (20 ml), and oxalyl chloride (1.27 g, 10 mmol) and N,N-dimethylformamide (15 μl) were added thereto at 0° C. The mixture was warmed to room temperature and stirred for 30 minutes, and the solvent was distilled off under reduced pressure. The residue was diluted with toluene, and the solution was concentrated under reduced pressure to eliminate the volatile components (repeated three times), and crude 2-[[bis(allyloxy)phosphoryl]oxymethyl]-4-cyanobenzoyl chloride was obtained.

Provenance & Evidence