反应详情

To a solution of dimethyl (3,3-difluoro-2-oxoheptyl)phosphonate (1) (0.453 g, 1.75 mmol) in anhydrous THF (7 ml), sodium hydride (60%, dispersion in mineral oil, 70 mg, 1.75 mmol) was added and stirred for 15 minutes at room temperature. A solution of methyl 7-[(1R,2R,3R,5S)-5-acetoxy-2-formyl-3-(2-tetrahydropyranyloxy)cyclopentyl]heptanate (2) (0.175 g, 439 mmol) in anhydrous THF (3 ml) was added thereto, and the mixed solution was heat refluxed for approximately 4 hours. Only a trace amount of the target product (3) was obtained.

1. temperaturethe mixed solution was heat
2. temperaturerefluxed for approximately 4 hours